All American Diesel and Fleet Services in Orange

632 W Angus Ave, Orange, CA 92868, United States

★★★★☆
(139 reviews)
Specialties: Diesel engine repair service Diesel engine dealer Truck accessories store Truck repair shop Used truck dealer

About

All American Diesel and Fleet Services has a friendly and knowledgeable staff committed to helping you with your truck. From light duty diesel repair and maintenance to heavy duty diesel truck repairs, our team offers a comprehensive solution for all your diesel needs. We specialize in semi truck towing service near you, ensuring your vehicle is back on the road swiftly. Our expertise also extends to DPF filter cleaning near you, providing top-notch diesel particulate filter cleaning service near you. As one of the largest independent diesel repair facilities in Orange County, we pride ourselves on exceptional diesel towing service near you and complete fleet maintenance. Contact us today for more information!

Website
allamericandieselservices.com
Address
632 W Angus Ave, Orange, CA 92868, United States
Plus Code
Q4XR+C7 Orange, California, USA
Time Zone
America/Los_Angeles

Business Hours

Sunday
Closed
Monday
7:30 am–6:30 pm
Tuesday
7:30 am–6:30 pm
Wednesday
7:30 am–6:30 pm
Thursday
7:30 am–6:30 pm
Friday
7:30 am–6:30 pm
Saturday
Closed

Services

Service options
Language assistance
Accessibility
Wheelchair-accessible car park Wheelchair-accessible entrance
Offerings
Oil change

Reviews

3.6
★★★★☆
139 reviews

Most Mentioned

vehicle (23) company (19) job (9) quality (8) team (7) tow (6) knowledge (6) scam (5) inspection (5) warranty (5)
5 stars
87
4 stars
4
3 stars
3
2 stars
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1 stars
44
March 10, 2025

If I could give ZERO stars, I would. Trust the older reviews (from a month ago or so) as they are accurate on how this shop operates and their schemes to milk you of every dollar they can. I needed to get my trailer repaired and they told me at MOST it would take 24 hours. Now, after 3 FULL DAYS, they want to charge me for them holding the trailer for this long? Absolutely absurd. These guys are NOT worth your business and I should have read the older reviews beforehand and not these newer ones that look paid (all the recent 5 star reviews have similar profiles and descriptions which indicate they are fake). No idea how these guys can do business this way at all as they give a bad rep to other repair shops. TAKE YOUR BUSINESS TO A REPUTABLE SHOP. They had requested my CC information which I gave on the basis that they would the charge the initial quoted amount, but I later found 3 UNSOLICITED CHARGES that they said were "part of the repair". Horrible Service. Horrible Shop. I am 100% sure there are better and actually honest trailer repair shops in Orange that you can find.

★★★★★
March 6, 2025

Greg and his team over it All American diesel and fleet Have always delivered exceptional service. Incredibly trustworthy, great communication and able to get our equipment back to us quickly, Which has a massive impact on us being able to run our fleet efficiently. Highly recommend.

★★★★★
February 28, 2025

Great experience here, I haven't been over in a while. Each time I have its a positive experience with the nicest people. Mark & Dannett took great care of me, they were very professional & kind. My oil changes are quick and easy and they always provide a complimentary inspection to advise if anything needs to be addressed. They are never high pressure to sell and I really appreciate that. Their great crew is dedicated and went out of their way to open on a Saturday for a big job I was having done so I could pick up my truck. It's nice to have a one stop shop especially when I'm driving up from South Orange County.

★★★★★
February 21, 2025

Brought my RV in for some repairs, and they did a good job. Mark is a really nice guy that works there. The service was straightforward, and the pricing was fair. Everything was done in a reasonable time, and my RV is running well.

★★★★★
February 6, 2025

Customer service from Stephanie was excellent. They took me in same day I had called and My Hino was ready the next day. Very nice people. Will definitely go back when needed. Price was reasonable also.

February 6, 2025

WARNING! PLEASE READ! PLEASE! I do not know what these guys are up to or what scam they are trying to run. They promise and promise and NEVER, NEVER, NEVER deliver on what they say. Everyone else on here is correct about the shop. If they tell you a day it would be a month. Mark and Stephanie try to be nice but they can't finish. And the basic maintenance that they did for me was faulty and almost caught my truck on fire. Do not come here, you will regret it.

January 30, 2025

just now New I took my Ford Transit Van in for a diagnostic The outcome was that I needed to replace the high pressure pump. Cost $5,000 , the truck will be ready 5 days. Mark is very believable. Over 10 days later I called to check and was told that I needed to replace the 5 injectors another $5,k+ plus and an additional 5 days. Two weeks later I called to check on my work truck that has been out of service for over 30 days I was told that I now needed to spend another $5k+ for a fuel filter etc . The story goes on and after spending almost $25k and 6 weeks , my engine light is still on so I have to go get a second opinion.

★★★★★
October 9, 2023

I cannot express enough how impressed I am with the top-notch service I received from Greg and the entire team at All American Diesel & Fleet Services. If you're looking for a team of experts who go above and beyond to ensure your vehicle is in its best shape, look no further. From the moment I walked into their shop, I was greeted with a warm and friendly atmosphere. Greg himself took the time to listen to my concerns and provided a thorough explanation of the issues with my diesel engine. His knowledge and passion for what he does are immediately evident, and it's clear that he genuinely cares about his customers and their vehicles. The work done on my diesel engine was nothing short of outstanding. The mechanics at All American Diesel & Fleet Services are true professionals who take pride in their craft. They worked meticulously to diagnose and fix the problem efficiently, ensuring that my vehicle was running smoothly again in no time. What sets this shop apart is their commitment to transparency. Greg kept me informed every step of the way, explaining the necessary repairs and providing a detailed breakdown of the costs involved. There were no surprises or hidden fees, which is a breath of fresh air in the automotive industry. In addition to their expertise, Greg and his team provide exceptional customer service. They treated me with respect and kindness, making me feel like a valued customer throughout the entire process. Their dedication to ensuring customer satisfaction is truly commendable. If you're in need of diesel engine repairs or maintenance, I wholeheartedly recommend Greg & The All American Diesel & Fleet Services. Their exceptional workmanship, transparency, and customer service make them stand out in the industry. I can confidently say that I've found my go-to mechanic, and I won't hesitate to return for any future automotive needs. Thank you, Greg, and the entire team for your outstanding service!

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March 10, 2025

Trust me, avoid this place if you can. Horrible customer service and reliability.

★★★★★
February 24, 2025

Great service, knowledgeable staff, kept me informed through every step of the process.

★★★★★
February 24, 2025

Had a solid experience here. The mechanic was straightforward about what needed to be fixed and got my vehicle fixed. The repair was done on time, and my truck is running well. No complaints!

★★★★★
February 24, 2025

I first brought my Ford E450 ambulance RV to Mark and the All American Diesel team, and ever since, they ve been the only shop I trust for all my vehicle needs. From routine maintenance to major repairs, their expertise and professionalism are unmatched. The team takes the time to explain every detail, ensuring you understand the work being done something you don t often find in other shops. What truly sets them apart is their commitment to their customers. One time, I ran out of fuel on the highway, and Mark and his team came to my rescue without hesitation. Their response was like a Navy SEAL drill flawless, efficient, and executed with precision. They had me back on the road in no time, turning what could have been a nightmare into a smooth recovery. If you own an ambulance conversion, fleet vehicle, or any specialty rig, this is the place to go. Their knowledge, honesty, and dedication to quality service are second to none. Highly recommend! - Aliso Viejo This keeps it polished while naturally including Aliso Viejo at the end. Let me know if you need any other tweaks!

January 24, 2025

Everything customers are complaining about this place is 100% true.the act nice in the beginning and ruin your car or truck charge you a lot and make your vehicle worst. they did it to me drove my truck running they gave back to me I had to tow away charged me 1200$ to break down my truck told me something else when I took to Frightliner they said someone played with your fuses but this place told me I need to replace transmission for $7000 they give me nightmares when I remember this place

December 24, 2024

WORST shop i have ever taken my vehicle to. NEVER TAKE YOUR TRUCK HERE FOR REPAIR! Extremely disappointed with all the work that was done to my vehicle. Took my car in to fix a starting isuse. My truck sat at their shop for a months and I had to continually call and hound them to start working on it. When they finally did they would tell me one thing was the issue and I would pay for labor and parts and it still wouldnt fix the problem. After that happening multiple times they said I needed to replace my entire wiring harness. After tearing apart my entire interior, they damaged multiple panels and even lost my floor mats. Its been months since I have had my truck back and they still havent given me a replacement. When I finally did get my truck back running they couldnt figure out why it was staying in limp mode. They promised they programmed all the new moduels that I paid to replace multiple times. I drove it home without power brakes,steering and check engine light which were all new issues they caused while it was there at the shop. I took it to a much better shop that actually knew what they were doing, they programmed everything they said they did and all lights went away and ran great. I continue to find more and more issues that they caused with my truck, cut wires missing conectors, unfinished work they half passed. MY WHOLE RESR SEAT WASNT BOLTED IN! Now I needed to trailer a car for work and they didnt conect my trailer brake system back up and there is no function to my trailer lights. WORST SHOP THAT JUST ROBS YOU OF YOUR MONEY AND LEAVES YOU WITH A WORSE AN EVEN WORSE VEHICLE THAN WHAT YOUR BROUGHT THEM!

Verified Reviewer
November 24, 2024

Fake reviews made up he will steal everything you have.

November 24, 2024

I sent truck there for changing hose They give me qoute for changing hose $2k That s ridiculous seriously I asked my mechanic he said it s only 30 mnts job Don t go there they are

October 24, 2024

This place and the people who run this place make me SICK!. At first they act very helpful but dont fall for this its all a setup to rip you off. They dont talk with the truth and will have you pay and sign paper work before work even is done. Parts will take longer than what you are told and if you call back for an update they will give you attitude and find excuses just to keep ripping you off. This place is literally a SCAM so people beware. Too many people with bad experiences here who have exposed this phony business. Please take note of this before you think of coming here because this place will RIP YOU OFF!

October 24, 2024

Please people take a second to listen before you become the next victim. This is a unethical Company theyre no good people. This company does not care about your concerns & will only use it against you to take advantage of you. What theyre doing is wrong. So Be careful with what you sign and be alert for alot of bogus charges because theyre all traps they want you to take the bait cuz they know exactly they are going to screw you over. Too many customers protesting against them. So please jusy stay away and dont become a victim. This company is operated by wicked individuals.

May 24, 2024

DO NOT USE THIS COMPANY!!! I regret not all the other reviews that are all very similar in what happens here. First the will be nice and helpful, Greg Mone Mark (who possibly could be a silent owner, but Denette Gola aka Deanna the receptionist ) will keep you posted, but then higher charges to your CC will happen with core deposit fees on almost everything they do. You will never see these core fees!! Then after they have your vehicle for awhile, you ll probably get a parking ticket (I did), but the real fun is once they have had your vehicle for over three months and you were told parts were ordered two months prior, you find out the waited two months to even order the parts (robbing Peter to pay Paul), even though they charged your CC two months prior for part, labor and core fees. But then after waiting two and a half months you ll probably get another charge to your CC, and when you inquire about it, you ll get this Mark said he messaged and told you there was a core fee and he said you agreed to it the lady who works the office will even lie and say she saw the messages. But once you send them the messages, that just tells you parts are coming (not additional charges) and no mention of additional money, they will start ignoring you. When you go there to talk they will continue to ask you to talk outside so no other customers can hear how bad they are. There is obviously a reason this company used a name very similar to a reputable company. Denette Gola the registered owner/CEO will act like she just works there and has no clue what s going on. But don t be fooled she is the owner and knows exactly what she is doing (not as a mechanic but a con). If you are talking to a guy who calls himself Mark, just know his real name is Greg Mone. Former owner of G&M Diesel that had it s license revoked. I did get my truck back and running from them after almost 4 months. Lots of lies from them, contested CC charges

March 24, 2024

Our truck came back to us in worse shape then it was when we took it in. Very disatistied with this business and will not put our trucks there again.

March 24, 2024

SCAM COMPANY. Do NOT give them a credit card under any circumstances. They will quote you one thing and charge you a complete different amount. Then, if you dispute that charge they will threaten to impound your truck unless you bring them cash. Then once you pay them that cash they will not refund your card. 100% scam operation. Anyone looking to do business with them contact me first and I will explain exactly what happened. The owner Denette I presume refuses to refund my card after we paid them cash just to get our truck released. This company should not be allowed to do business by these standards. Mark, one of the service managers was also very rude the entire time and original quoted me $495 for the truck tow but immediately charged my card nearly $800. Zero response when I asked for the reason why the increase in the charge.

★★★★★
March 24, 2024

Had some maintenance done excellent people will definitely be back serviced our vehicles for three years now now

March 24, 2024

WORST COMPANY EVER! NEVER bring your van or car here. This is the worst company. I brought my van to this place and they give back to me worst!! they removed original parts from the van!!! addition to that, they promised to give it back to me in a week or so and it took 3 months!! 3 months for nothing! They didn t fix anything! Besides that, they will charge you a reasonable price in the beginning but over the time they will charge more and more! if they promise you it will be 2,000, you will end up paying 20,000! this company is definitely a scam! MARK (the owner) is totally unprofessional! VERY RUDE PERSON! 0% professional! Mark and the staff will threat you like trash! ALL AMERICAN DIESEL & FLEET SERVICES has to disappear from this country!! NEVER EVER IN YOUR LIFE BRING YOUR VEHICLE HERE! NEVERRRRR!

March 24, 2024

Run fast do not do business here. He is not licensed

March 24, 2024

STAY AWAY! from this Shop! they dont deserve the name they gave themselves, they definitely need to change it! They don t know what they are doing they just know how to make money from you. I came there with one check light, they told me my truck will be ready tomorrow and they kept me 10 days every day day they telling me new problem and made me to pay, as a result I left with nothing , I left them with two check lights, I had to go another shop to fix. The manager her name is Dinett she is totally unprofessional and rude person, the first day she was nice the first thing she asked me to pay, they even didn t begin and then everyday she made me to pay for something new, I begin with $600 and ended up paying $10,000! when I began to start demanding some result she just hangs up and doesn t talk with you, addition she charged me one amount twice and told me she is going to refund me and still didn t . This company is definitely a scam!

March 24, 2024

I don t post reviews, but I am making an exception, because dealing with this company was an unpleasant experience. It would be a long list of complains if I had to mention everything what happened, so I will only focus on the most important things. The service (inspection of the truck due to a DMV yearly requirement) was performed in august First, they tried to charge for things we didn t need or already had (emergency safety triangles), required side stickers started to peal the next day after we received the truck. There was literally no communication from the company during the time they had the truck, I was calling daily, just to get a completion date and time and was always s told they would let me know. Well, they never did, until the day when the truck was finally ready on Friday, at 3pm - we did not have anyone here anymore to have it picked up Anyway, It s December now and I get a parking citation in mail from the City of Orange. The truck was left on the street the All American Fleet resides at. They did not inform us at the time they gave us the truck about this So I start calling and e-mailing. Dealing with 3 different people and they keep blaming each other. No response for a week. I keep calling. The guy working there starts lying and tries to convince me the citation was our responsibility because we did not pick up the truck. Well, the citation was from Wednesday, the truck was only ready on Friday So it was not even ready at the time the citation was issued When I confronted him, he said he would need to talk to the upper management. Again, no response for days. Now I am dealing with a different employee - Briana, she makes an excuse that she wasn t involved in this earlier. Well, I don t carer, you all work for the same place, don t you? So Briana tells me she has already paid the citation, This is on Wednesday., OK, please send me the confirmation, I asked. NO, She can t, she is busy dealing with customers. (How long does it really take to send an e-mail???, 2-3 minutes at the most? OK, Now it s Thursday, 2 weeks since I started calling them. The same story as on Wednesday, she is busy and cannot send me the e-mail Friday. I am really losing my patience, Briana claims again that the citation had been paid, but still don t have time to e-mail the confirmation. I call the City of Orange and SUPRIES SUPRIES, it had not been paid I call again, this time I confront her and ask why does everyone keeps lying to me? She claims it had been paid. I threaten to involve our legal department, which I guess worked I am finally getting an e-mail from Briana with an apology that she missed it and didn t paid it earlier + the payment confirmation. If you want to save time and your nerves, do not engage with this company and try to find someone who employes more honest people and not bunch of liars.

March 24, 2024

Had a rental truck that brokedown near LA and found this place online. STAY AWAY! They seemed very nice and convincing at first that they were helping me but soon enough I got taken advantage of for not knowing anything about trucks. They did not stop adding more and more charges each week and took over 2 months to complete the work because they were waiting on parts. I called them everyday and they always said they would call back and never did. Found out from other people that this happened to them too.

March 24, 2024

I had a horrible experience with this company (and have heard from people in the industry) that they have had similar experiences. First of all, they took about 2 months to get a simple part for a rental truck that we had them fix. I called every day for status updates since we were getting charged for the rental of the truck, and it was a mission just getting them to call me back (very unprofessional and rude). After they finally got this part, they said it was the wrong one and then they took an additional few weeks to get the right part. They charged our card for the full price of the service (way more then others have since quoted for the same work), but refused to give the truck back until we sent them a photo of the card and my drivers license. They said it was company policy to do so prior to taking payment, but this clearly was not true since they charged the card prior to asking for this. I ended up being an hour late to our company holiday party since they had this insane request and if I didnt do this, we would have had to had our driver (at our expense) come back on a different day. All in all, one of the worst repair companies I have ever dealt with. Very unprofessional, very rude, very incompetent, very slow, very expensive. If I could give negative stars, I would. Stay away!

March 24, 2024

DO NOT USE THIS COMPANY!!!!! WORST CUSTOMER SERVICE I HAVE EVER EXPERIENCED!! Our company worked with them and it was nightmare costing us thousands of dollars!!! What kind of company asks their customers to send pictures of their credit card over email?!?!?!?!

March 24, 2024

HORRIFIC experience working with this company. NEVER EVER bring your vehicle here. They are unprofessional, slow, and scam you out of a lot of money!! Our company worked with them and we could not be more sorry that we did. STAY AWAY!

March 24, 2024

Complete scam, I wish I could give them 0 stars.

March 24, 2024

If I could give 0 stars, I would. 4500 dollars later and my truck still doesnt run, and they had it for over 4 months (and had the nerve to ask me to be patient). Shoddy repair done that I could have done a better job myself. I also noticed body damage that wasnt there before. The only reason I took it to them was because I didnt have a place to work on my vehicle at the time. I really wanted to believe in this company. The boss seemed like he cared until I addressed my concerns to him. Its unfortunate that it had to come to this. I should have read the other reviews before I decided on this place. Please, DO NOT take your vehicle to this place for repair!

March 24, 2024

The worst shop ever, they dont know how to fix and they give you cheap quotes at the beginning and then you will find yourself paying thousands for literally nothing. Scammers!

★★★★★
March 24, 2024

My truck had a leak and was unable to drive it to their shop, as well as working early in the morning I was unable to get it to All American Diesel and they were able to compensate and work with me. They were able to come tow my truck for me to their shop which I found extremely helpful and made things a lot easier and less stressful on myself. Really nice people who just want to help out.

March 24, 2023

red flag number 1 you looking for a diesel shop all shops and dealerships will not take you for 4 to 6 weeks this shop will take you ! claiming hes got plenty of mechanic and they fast ! ones you truck vehicle is there he will ring you up $$ for things you dont need ! he will not communicate with you at all you have to chase him , he will switched parts on you vehicle to ring you up that much is you let him .. very shady & unprofessional! you dont have to believe this just look at the reviews on BBB better businesses bareu.. beware! beware!

March 24, 2023

DO NOT TAKE YOUR VEHICLE HERE This business should not be operable and allowed to continue ripping off people who work hard for their money. They have changed their business name several times in the attempt to cover their dirty work. Greg, how can you in good faith take peoples money when you or the shop dont do the actual work that is required. You should not be allowed to run a business and hopefully you end up behind bars for your dishonest deeds. In response to Owners comments: I have an invoice from you for 2021 with a different company name than the one I have from you for this year and I dealt with you personally so to say you just bought the company in 2022 is false. There is no point to try and make things better now when the damage has been done. The best outcome is to share with others and help them stay away from your business.

March 24, 2023

Wish you could give no star thats my choice. You value your vehicle this is not the place to go. Lets see had the vehicle over a year, double billed for parts, temporarily fixed items which malfunctioned within hours after picking up vehicle. Body damage while at their facility. Parts were missing need I say more. Stay clear of this place.

March 24, 2023

WARNING !!!!!!!!!! This shop has countless complaints filed with the Bureau of Automotive repairs Graigs auto repair license revoked in March of this year!!!! Save yourself the head ache and loss of time and money STAY AWAY from this shop!!!!!!!!! DONT BE FOOLED THE OWNERSHIP HASNT CHANGED JUST THE NAME !!!!!

March 24, 2023

I would not recommend coming here they are a complete ripoff I dont how there still in business they over price the parts dont actually change the parts that they say you need I paid 7000 just for the same problem to come back 2 mouths later and tell me that Im not covered under warranty is no stars were a option I would definitely have no stars

March 24, 2023

Extremely unprofessional, charged me $7,000 for a repair on my truck that ended up breaking again and they refused to fix it under warranty for me. Extremely dissatisfied with their service!

Verified Reviewer
March 24, 2023

BEWARE!!! DO NOT COME HERE!!! They specialize in taking all your money and giving your truck/car back with more problems and all your money in their pocket, using a credit approval process and charging it to the limit without ordering parts that they say have been ordered which never show up and you cant get a refund because no return policy... owners name is Greg, he may say his name is Mark but its not. THIS BUISNESS IS A FRAUD

★★★★★
Verified Reviewer
March 24, 2023

Good people , good service honest business

★★★
March 24, 2023

This shop has been around for at least like 4 years, because last time I went they were way too busy to work on my truck. Ill give the owners credit because theyre clearly a very popular place. However I feel like their popularity is also a huge downfall for them. The shop is incredibly small and I actually saw a group of maybe 10-15 trucks parked around the corner/across the street at the PUBLIC PARK. A police officer was actually outside their business the morning I came in and he was writing several parking tickets with the owner outside trying to move vehicles. Im not here to knock there work because I do know some of my buddies got great service here, however I cant put faith or trust my vehicle to a shop that cant even keep my vehicle within their eyesight and instead is trashing customer property at a public parking lot across a major street. Major security & liability issues.

★★★★★
March 24, 2022

Spoke to Lance regarding repairs for my RV motorhome and told him I had received a quote from another shop and asked if I can get a quote from him for the same work if I just emailed him the list of work to be done from my current quote. He was very personable and took the time review the files I sent him and he called me back the same day and discussed the type of jobs to be done and he stressed the importance of quality parts and gave me some great insight and he was very honest and knowledgeable. I havent gotten My RV fixed yet, but wanted to write this review and thank G&M Diesel Services for great customer service. Much appreciated!

Verified Reviewer
March 24, 2022

Did not expect the cost of doing business with this facility and BeWare as we left over $12,000 shorter after picking up our 2002 Chevy which was brought in to replace injectors & wheel bearings. This truck has been well maintained and has only 135,000 miles on it. Again be warned.

March 24, 2022

Full of bot 5stars or customer offer discount to leave 5 star over their pil change or brake pad replacement lol. Gm is company without justice craving for profit. I already shared our exeprience so i wont again. Word of advise to u greg. Be rich like me. Then u wont need to yell out ur customer of ur wrong. U can finally compensate if ur rich. just compensate and make million instead. pathetic owner

★★★★★
March 24, 2021

If I could, I would give G&M 10 Stars! I am a returning customer here at G&M. I m always provided with 10 Star service. I am updating my review because I believe Greg s and Debbie s honesty and Integrity should be known and rewarded. I recently brought my truck in for service. My truck is working great now. I get a phone call the day after I picked up my truck; and Debbie tells me due to new computer system, I accidentally got overcharged for something and they want to give me my money back. I am astonished with the level of honesty and integrity from G&M. I think most other dealerships would have just kept the money, but not here at G&M. You won t regret choosing G&M. Thank you Greg and Debbie. Here is my previous review: Greg and his team took care of my 2007 Chevy Suburban. The truck would not start, was leaking oil, and had the check engine light on. I knew my truck needed a lot of work. G&M took care of it all. I live about 25 miles away from this G&M, but I brought my truck here because I trust their expertise, experience, honesty and integrity. Capri at the front desk is always very courteous and helpful. The truck is running great. Thank you

Verified Reviewer
March 24, 2021

THIS IS A VERY GOOD EXAMPLE OF WHAT A SCAMMER IS FOR A COMPANY...I HAVE REPORTED THEM TO THE Bureau of Automotive Repair AND HAVE FILED A COMPLAINT...FOR ALL THE ADDED ON REPAIR COSTS YOU MIGHT AS WELL BUY YOURSELF A NEW RIDE...GREG YOURE A SCAMMER

★★★★★
March 24, 2021

G&m diesel largest independent diesel shop in southern California. At g&m diesel we are your one stop shop for diesel repair and service. We handle anything from a basic oil changed to installing a lift kit on your favorite. We are open from 8 a.m. to 8 p.m. call us anytime ask for Mick in .service

★★★★★
Verified Reviewer
March 24, 2021

Great customer service everybody should take there Chevy Tahoe there.

March 24, 2021

was a regular here but recently moved so I found a new mechanic. I called G&M on Friday, July 3rd when my new mechanic found that my truck s water pump was leaking, the timing belt cover needed resealed, and the trans pan was leaking. He also said that all of the work looked too new to need redone and should be covered under warranty. Thus, I called G&M as they did all three repairs (around 106,000 miles, my truck currently only has 122,700 miles, although it has admittedly been 2.5 years since those repairs). Chris gave me an appointment for Tuesday, July 7th at 8:00 a.m. and assured me that it would be done that day. When I brought my truck in at 8:00 a.m., I stood in the shop until 8:30 a.m., when Chris finally took my keys. Chris initially argued with me about doing a $129.99 dollar multi-point inspection, as I d just had one done the week prior and was telling Chris exactly what needed to be done. The only reason I even brought the truck back to G&M was because the water pump was unquestionably under warranty, otherwise I would have had my new guy do the work. I asked Chris if he thought that they d still be able to get the truck done that as I needed it back, and he assured me multiple times that they would. Chris printed out my old work receipts for the items that they d worked on. I was interested to see that my warranty for the rebuilt transmission that I paid $3,000 for only stated that it was 2-year or 24,000 miles when Greg and I had separately negotiated a longer warranty via text message for 30,000 miles. Surprisingly, G&M refused to honor any of the warranties other than the water pump, despite me being well under the mileage and their workmanship seemingly failing after very few miles of driving. And, even for the water pump, Greg refused to replace a thermometer under warranty that he admitted was CAUSED by the leaking water pump. Greg also assured me multiple times that they d have the truck ready by the end of day. At 11:30 a.m., I finally get a written estimate. The estimate did not include a completion date, as required under California law if the final bill is to exceed $100, which I overlooked given the numerous verbal assurances by G&M as to when the work would be done. Greg says they found over $3,500 worth of work, but my new mechanic had inspected the truck 4 days earlier and disagreed with Greg s assessment of what the truck needed. After Greg and I agreed to the work that G&M would do (the water pump, transmission service and fixing transmission pan leak), he again assured me that the truck would be ready by the end of the day, and even said his guys work until 7:00 p.m., sometimes even 8:00 p.m. if they have to. Greg said that he d call me that afternoon once it was done. At 6:45 p.m., I had not heard anything from G&M, and I had a friend bring me over to the shop to pay and pick up the truck as Greg said that it would be ready. I called Greg as I was getting close, and he said the guys still have a little more work that they need to do on it and it d be better if they could just finish it up tomorrow. I told him that it looked like they hadn t done anything as the truck was where it was parked when I d left it at 12:00p.m. He claimed that they d done some work to it and proceeded to get angry at me when I told him that what he was saying was unacceptable as he and Chris assured me multiple times that the truck would be done that day. He then claimed that the scope of the work was simply too much for one day of work (4.3 hours on the estimate), despite him and Chris assuring me multiple times otherwise with knowledge of what the scope of work. Greg said that his guys would look at it tomorrow and he d call me in the afternoon for a status update. So now I m without a vehicle for two business day and have to cancel meetings in San Diego for Wednesday. At 6:00 p.m. Wednesday, I hadn t heard from Greg with an update, so I texted him. I eventually got the truck home by 10:30 p.m. with no discount for the hassle, when I was promised to have had the truck back the day I left it there.

★★★★★
March 24, 2021

I am writing this review purely based on the phone conversation I had with a lady that initially answered the call followed by Greg who graciously answered a few questions for me about an emissions equipment issue I am having with my 2018 Chevrolet Colorado Duramax Diesel truck. I was an auto mechanic for the better part of 10 years before I left to do IT work. This place sounds off the charts in terms of diagnosing capabilities, willingness to work with the customer on difficult to diagnose issues, and warranty work. They can do direct warranties on Dodge and Ford. For GM, GM does not allow direct warranty work but customers can still have them do the work and get GM to honor the work. This business knows how to write up the paperwork correctly for GM and Chevy so that the warranty will be honored. I highly recommend this shop based on that conversation alone.

★★★★★
Verified Reviewer
March 24, 2021

All the staff is suuuuper nice & friendly! Excellent service!

★★★★★
March 24, 2021

I am from Georgia i had a truck up there and called them and they got right on it and got me in there thank u and if Im up there or someone else is up there I will be coming your way if something happens again i will be going back there. They are good people thanks

★★★★★
March 24, 2021

My vehicle was towed into G&M because I put gas into my diesel truck. I was concerned I did a lot of damage. Greg was really nice and knowledgeable about this, apparently I m not the only one who has done this. He explained in detail how they would approach this and I feel so much better. I have had my vehicle back for a few months and it s running great. Thanks to this awesome shop and the honesty I received they re my lifesaver. Really glad I was referred here by a few of my buddies that speak so highly about G&M

★★★★★
March 24, 2021

Had repairs done at G&M 2005 Ford Excursion runs great the people at this establishment are stand up people hard to find a company like G&M.Carrol and I will enjoy the truck for another 15 years Thank You GOOD JOB.

★★★★★
Verified Reviewer
March 24, 2021

Just had a 2014 lariat overhauled new power plant etc.

★★★★★
March 24, 2021

Great service and great staff. Greg and his boys know their stuff and do really solid work. Thank you for bulletproofing my F-250 6.0

March 24, 2020

Beware of this shop, they ruined 2 of our trucks and charged us thousands. 1 truck still at their shop, refusing to release it back to us after charging us $7000. Look for a Ford F650 stakebed at their lot and youll see yourself. Greg stated he had a replacement Block, after taking out the entire engine apart he calls back stating he doesnt have a Block. See the pics. Speak for itself. This is how they returned back to us after charging $7000. This is 2nd truck. Need details feel free to reach out to our company. Currently going through legal means to get this situated. They wont even send you an invoice before they charge your account. Forged our signatures on invoices. DO NOT GIVE THEM YOUR CREDIT CARD information.

March 24, 2020

Not a place i would ever do business with again .i go in with a truck that has a sensor problem and i leave with a new rebuild motor because of a bad cylinder .so you would think after 12000.00 plus that ther would be no check engine light on .not this place the first time i take home after 3 months in leaks out all the oil out of the motor in my drivway .so they tow it back and fix what seal they forgot to replace and .yet still check engine light .just the most dishonest practices i ever encountered .they got me ha ha on me .never again .its to bad i was hopping there was a honest deisel machanic around but yet .Not this place . Yes i am not a mechanic .and i paid for it. But normally a machanic can tell you what was wrong after the tear down what its going to cost .not start at the tires . i told you my budget and you reach the amount .u should have been able to tell me it would end up costing me 4 times the amount .i just felt like i was getting strung along and if i didnt keep going i would have waisted money. That not good buisness.u know what happened .you guys are good mechanics just need to be better custamer care people and honest about the cost ..i wouldnt send a custemer home with a check engine light on after spending 13000.oo. Just doesnt seem right is all .im hopeing this just helpes you learn how not to treat a honest customer. Good luck in you future .i learned my lesson

★★★★★
March 24, 2020

This is a great shop! Greg and his crew are very helpful. They are busy however always make time for each customer. I have been a loyal customer for several years, there just isn t a better shop.

★★★★★
March 24, 2020

I took my 93 Dodge to G &M because it s hard to find someone trustworthy enough to give the truck over & who is smart enough to work on it lol. They did gears, pump work, injectors, & fixed a bunch of leaks. They got the job done in a timely manner, but it did take a while to get the pump back from Bosch, but G&M has nothing to do with that. In conclusion, these guys really know what they are doing & they have my business for life! 10/10 would recommend.

★★★★★
Verified Reviewer
March 24, 2020

Ive been using G&M diesel for years for my fleet management and repairs. Hands down, nobody out there offers a better value for their customers. I have had several times when we had a vehicle go down as an emergency. G&M understands that every minute of down time cost us alot of money. They had us back up and running faster than I thought was possible. Thanks guys.

★★★★★
Verified Reviewer
March 24, 2020

I went in for a water pump and they were able to get right on it and finish it within 1 day and I added a bunch of other service. A quality job and time were the most important things for me and they absolutely hit the mark. I know Ill be back.

★★★★★
March 24, 2020

Hey guys its Justin. Thanks for the great advice! I had to give ya the good review. Cheers!

★★★★★
Verified Reviewer
March 24, 2019

Very professional love the management looks like a very efficient repair facility I would take my vehicle here based just on the interaction with the owner.

March 24, 2019

sorry to say but they do not know what they are doing. came in for repairs and left with the same problem that they said was fixed. so they would rather blame the customer then fix the problem. gave one star because could not put in zero stars

★★★★★
March 24, 2019

Been going here for over a year with my husband Kelly. Theyve worked on all our cars.

★★★★★
Verified Reviewer
March 24, 2019

Dwayne Johnsons cousin works here... When you want something done, this is the place. They have a certified Mercedes tech working here. They warranty their work that is done on your diesel. You should always make appointments wherever you go, but if you seriously need it done like yesterday or need a tow, just ask Greg. Theyll tow your diesel truck for free if youre within 7 miles. Too bad I wasnt, but the difference was hella cheap.

★★★★★
March 24, 2019

I visited G&M due to a recomidation from a friend and I must say my expirence was fantastic. I have used them for multiple large repairs on my 01 f-250 Come to find out I had a failing cylinder which lead to a bad head. Greg and his team where fast with a diagnosis and quick to communicate the issues to me to get my rig back on the road. The team gave me different options for fixing the issue and Overall it came out to a complete top end rebuild to do the proper repair. Within 4 months of that repair my transfer case locked up damaging the gears and other internal parts which lead to me having to replace the entire case and with a helpful suggestions from his team and some reconidations from research I found online we went through the transmission and rear differential to make my drive train bulletproof. This by far was the best experience I have ever had in a shop. Prices are great and competitive to other local diesel shops in the Orange County area. G&M will defiantly be my number 1 choice for my family for any repair or service on our vehicles.

★★★★★
March 24, 2019

Great shop !! G&M Diesel Will be doing all my Maintenance on my 6.0 ...

March 24, 2019

Worst service they don t care for customers

★★★★★
March 24, 2019

I would highly recommend this diesel mechanics shop. They run a clean and organized business with integrity. Greg was very helpful from the minute I handed him my keys until I drove away. If youre looking for a shop that diagnoses honestly, repairs completely, and handles the process seamlessly, come here.

★★★★★
March 24, 2019

Super happy with the level of service and knowledge G&M Auto Care provides. There isnt another auto repair shop in all of Orange County that compares to this place. Superior products at a reasonable price! Update: I have been taking my Commercial Fleet to G&M Diesel Services for over a year. Their expert diesel mechanics are the best and know what theyre doing opposed to other shops in the nearby area. I have 2 businesses with medium to heavy duty trucks. GM Diesel keeps them all in great running performance. My Cummins Diesel Trucks have never ran better. Thanks Greg, you run one hell of a great shop.

★★★★★
March 24, 2019

I cannot say enough good things about Greg and this shop, brought a truck in to have a pre purchase inspection done and which yielded several problems. I had flown in to the area to purchase this truck and would have been stranded had the crew here not went out of their way to make the necessary repairs. Amazing customer service and knowledgeable staff. I Would HIGHLY recommend this shop.

★★★★★
Verified Reviewer
March 24, 2019

I came in to get my husbands truck an oil change. Since the minute I drove up everyone was so nice. Everyone had a great work attitude, friendly, helpful and informative. The wait was a while but i also came knowing there may be a wait because I just drove in no appointment. No one seemed sketchy at all like the dealerships and never gave off a just want your money vibe. I recommend this place and Ill most likely be going back. Big thank you to G&M diesel services and everyone who helped me out

★★★★★
Verified Reviewer
March 24, 2019

Great Customer Service , owner is best , all the mechanics were courteous and asked if we needed anything. Not from Orange Country and had some break problems on what they worked on, got it taken care of with local shop with no problems. I see why they are awarded #1 shop in orange country

★★★★★
March 24, 2018

Best place to get your Car fixed!! Greg was a very honest guy. :)

★★★★★
March 24, 2018

Great service. Theyll take care of you.

★★★★★
March 24, 2018

Guys are really pleasant here. They make you feel welcomed. Been able to walk in or schedule appointment. Priced area great and they wont try to offer something you dont need. Very happy coming here. Thanks G&M.

★★★★
Verified Reviewer
March 24, 2018

A good diesel mechanic shop

★★★★★
March 24, 2018

Great shop. Great workmanship. Great employees.

★★★★★
March 24, 2017

Great service and EXCELLENT auto repair is what I get each and every time I visit G&M Auto Care. This place is the best when it comes to the best prices and dependable auto repair. My brother came here and had his truck lifted. WOW! they did a great job and their prices were way more reasonable than anybody else in Orange County! I cant say enough good things about this place. Stop by yourself and get the best auto repair possible.

★★★★★
March 24, 2017

Great service and great prices. I have been to a lot of shops over the years, however after coming to G&M Auto Care I wont go anywhere else. The owner is a real professional who takes the time to meet with each customer and fully discuss the options and best path to take. Im super impressed with this place and highly recommend them.

★★★★★
March 24, 2017

One of the best things I like about going to G&M Auto Care is that they ALWAYS have the best attitudes. They take such pride in the work they do that its second nature to everyone at G&M to talk to their customers like intelligent people. I have witnessed this and received this kind of genuine customer care each and every time Im at the shop. They have a great way of doing business and it works, treat each customer with respect and provide quality work at a fair price.

★★★★★
Verified Reviewer
March 24, 2017

Im very impressed with the quality of workmanship and Pride G&M put into every vehicle,I would recommend this place to anyone who needs quality auto repair and services. Thanks G&M Auto care

★★★★★
March 24, 2017

I have an older BMW that requires a lot of patience. I have used other shops in the past that seem to do very little good work for a high price. A good friend told me about G&M Auto Care and how happy they have been for years. I went over to the shop and spoke to Greg. He explained everything in terms that were easy to understand. I got my car back and it honestly has never ran better. The price was more than fair and the service is seriously the best. I wish I could give this company 10 stars!!

★★★★★
March 24, 2017

This company is the best when it comes to auto repair, their repairs are all quality and their crew is very professional! I wont go anywhere else. Thank you Greg for making my car run great and keeping it well maintained. Our family loves G&M Auto Care!

★★★★★
March 24, 2017

Best Auto Repair Orange has to offer! These guys are great! I have a fleet of diesel engine medium duty trucks that Greg and his team of master mechanics have been servicing for years now. These trucks get a lot of miles on them so keeping each well maintained is very important to my company. Each time one of my diesel trucks has been to G&M Auto Care the service is complete with no problem. Their turn time is always as promised and the prices are more than fair. I will be a lifetime customer and encourage others to seek out this great shop!

★★★★★
March 24, 2017

I got tipped off by a friend to go to G&M after looking to put a lift and a locker on my van. I went to G and M and they turned my family van into the beast it is today. I drive places people in jeeps have no idea how I made it. Sometimes I dont even know how I made it but my van takes me wherever I want to go now. Thanks G&M for giving Freedom the van the steong soul it has today!

★★★★★
March 24, 2016

Great service by a really professional crew. Im so impressed with this shop that I just have to let the public know. If you are in need of Auto Repair and want the best in the city of Orange, this is the place you want to go to. They do everything from oil changes to engine rebuilding.

★★★★★
March 24, 2016

Getting the best service on your car is never easy for some reason. At G & M Auto Care you will never have that problem. They really care about customer satisfaction and quality. I have never seen a better ran shop. This place is the best!

★★★★★
March 24, 2016

I needed auto care done and wanted an expert. I was told about G & M Auto Care by a friend that was really happy with their service. I called and made an appointment to get my engine worked on. I was really happy with the finished work, and the price was reasonable too. Thank you for your help, I will be your customer for life.

★★★★★
March 24, 2016

Greg and his team are the best! Wouldnt go anywhere else.

★★★★★
March 24, 2016

Man this shop is the BEST Auto Repair Orange has to offer!! Every time I go here I get the best auto maintenance service. The guys are focused, professional and very friendly. I really appreciate that the owner makes it his priority to meet and greet every customer. He really goes out of his way to make each customer understand everything that is being performed on their car. Im old so I have a lot of time to sit and watch how people interact with others. I have to say that this place is as busy as it is because they provide quality service to everyone.

★★★★★
March 24, 2016

Getting my truck worked on by the best auto repair was my goal. Going to G&M Auto Care was the best decision. I have two work associates that have been going here for a long time, so they came highly recommended. The owner is professional and courteous. All the repairs we discussed that were necessary to keep my vehicle running in top condition were done with quality. Super happy I came here everyone is professional and happy to help. I vote 10 Stars!

★★★★★
March 24, 2016

Took my wifes car to G&M Auto Care as it needed a lot of work. Nothing was running right and I just didnt know what the problem was. I spoke to the owner who explained that they would run a complete vehicle inspection and let me know what exactly we need to do. A little while longer everything was explained and we began the process. I went back the next day to pick up the car and was really impressed with the sound of the car (if you heard it before you would understand) anyway the car ran great the charges were more than fair and now 2 months later my wifes car is still running like new. I think the money we spent was worth every penny. Thanks guys my wife is happy and that says a lot!!!

★★★★★
March 24, 2016

Getting my car repaired was really over due. I have a super busy schedule and was way behind on my automotive maintenance. I went to G&M Auto Care because my brother highly recommended them. These guys are well organized, great mechanics and the owner makes it a priority to personally talk to his customers. I sure appreciate an automotive repair shop that is clean and friendly. G&M is my new automotive shop for sure! I read that they were the winner for 2015 Best Auto Repair so I inquired. The City of Orange Voted and gave G&M Auto Care the 2015 Award. I clearly can see why.

★★★★★
March 24, 2015

Thank you so much for helping me out with my car and getting it fixed. Im so happy with the way my car runs now and it didnt cost me a bunch to get it working again. Its really great to know that there is an automotive shop in the city of Orange with honest people. I am a customer for life!!

★★★★★
March 24, 2015

This company is really great, the crew is awesome and they always go the extra mile to insure customer satisfaction.

★★★★★
Verified Reviewer
March 24, 2015

I am truly impressed with Greg. He goes above and beyond the call of duty to make you happy. I would highly reccommend him for any and all automotive care needs as well as tires, his prices were the best I found.

★★★★★
March 24, 2015

This shop has the best mechanics in the OC. They are professional and really knowledged. Its great to have an auto repair mechanic that gets the job done right the first time. They said their motto is Because We Care and I beleive them.

★★★★★
March 24, 2015

I was in town visiting family and needed to help my sister with her car. We were told about a great shop called G & M that my family had used. We took her car over and had the maintenance done and a few other things. I was really impressed with this shop and the ownder. They really go out of their way to make sure that each and every client is properly taken care of. WOW I have never seen that before. Usually you go to a shop and they try to drain your wallet. Thanks guys, you made me a believer.

★★★★★
March 24, 2015

I cant say enough good things about this auto repair company. They do top quality work that I know I can depend on and that speaks for its self. My car needed to be aligned, it was seriously in bad shape. These guys got it all fixed up and did an amazing job.

★★★★★
March 24, 2015

We took our car over to G & M thinking we were going to have a big problem and a big bill to go with it. G & M Auto Care got us up and running in a short time with their great mechanics and the bill wasnt bad at all. Thanks Guys

★★★★★
March 24, 2015

Great service and I have to say that this crew of experts are the best in ALL of Orange County. They get the job done right and the prices are more than fair. 10 stars for G & M Auto Care.

★★★★★
March 24, 2014

I was I need of a lot of work on my truck and wanted a pro to get the job done right. I had heard about this shop in orange. G & M Auto Care, I called and made an appointment to go down there and discuss all the work that my truck needed. Upon my arrival I was greeted by a really friendly crew, these guys arent in for the big sale like lots of shops are. They are really interested in getting the job done right and having a happy client. I left my truck with them and when it was done the difference was really amazing. My truck rode like it was new again and my bank account didnt suffer. I now have a shop where I will be taking all my vehicles to and with out a doubt know that G & M will take good care of me. Thank you!

★★★★★
March 24, 2014

Needing engine work can be such a pain, I wanted to keep my truck but didnt know if it would be worth all the work, effort and not to mention expense. A good friend of mine told me about G & M auto Care. I went over to the shop and met with the owner. I was really happy with all his knowledge and great ideas of how to move forward. This wasnt going to be a quick fix and I knew that. Using G & M Auto Care for this project was the best decision ever. I am really happy with my new engine and know that my 1967 truck is going to continue to get me where I want to go!!

★★★★★
March 24, 2013

Having a great auto mechanic can be hard to find. I found G & M Auto Care and will never go any where else. They are the best in all of Orange County California. If you have any automotive repair needs these are the guys to call. They do everything from small engine to the most high tech turbo engines. I am so impressed with this company I cannot imagine going to anybody else. Thank you for your great automotive care G & M