I can't say enough good things about George and the team at Diesel Tune! We brought our 2008 Ford Super Duty in with a very complex problem, and they did an amazing job navigating through it and getting to the bottom of the issue. They saved us a tremendous amount of money, and we truly appreciate their honesty and expertise. They worked quickly, communicated well, and were incredibly kind and professional throughout the entire process. I especially appreciated how female-friendly and welcoming they were. As a woman, sometimes walking into an automotive shop can feel intimidating or uncomfortable, but George and his team made me feel respected, listened to, and completely comfortable. Thank you, George, for taking such great care of us and our truck! We will definitely be coming back to Diesel Tune and recommending you to everyone we know. Excellent service from start to finish! read more

An overdue review for a great business! Diesel Tune is definitely one of the best diesel mechanics in the area. I encourage you to take your truck with the most issues, these guys will repair it all in a super efficient time frame at a reasonable cost guaranteed. Thank you ! read more

George is the man! Super helpful, super knowledgeable, and works super fast to get your truck running flawlessly ! My 07 LBZ Dmax went in for a head gasket job and i got it back running better then ever. If you're looking for a good, reliable, and affordable shop look no further. They are super detail oriented and go above and beyond to make sure the job is done right and you're satisfied. Thanks again George! read more

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Diesel Tune is your go-to shop for all of your diesel repairs!!!!! I'm so thankful I found George and his highly capable crew of mechanics. "Diesel" = $$$$$ and Diesel Tune has always had fair prices, they are quick to try and get my truck in, diagnosed and out whenever possible. They always find OG parts when they're available for my 97 and go out of their way as far as customer service goes. I'd give them 10 Stars if I could. If you want an honest shop, no bullshit... then Diesel Tune is the place!!! read more

I have a 2023 F350 Lariat with the high output diesel. This is my first diesel truck and everyone told me they are more expensive and difficult to maintain. This truck is a workhorse and I use it to haul loads of gravel and soil for construction. Last month, I had an attempted break in that immobilized the truck. I had it sent on a flatbed to my local Ford dealer. They took 2 weeks to tell me that it needed a full fuel system replacement for $19k. They did a recall and charged me $500 for a diagnostic.I absolutely could not believe the truck needed this much work, so I took it to Diesel Tune for a second opinion. George and his guys looked over the truck and plugged in the OBD2 reader. They couldn't find anything wrong with the truck and they even check over all the fluids for contamination. We ended up doing a full 50,000 mile service with filters and fluids replaced along with some additional consumables. The total was $2600 and all the work was done diligently on time. I gave the dealer an earful and they refunded the money they charged me for a diagnostic. Diesel Tune has my business for life. I would give George and his team more stars if I could. read more

Diesel Tune - back on the road! - Auto Repair Near Me - Downey, California

Had a persistent rattle in my Silverado that another shop couldn't diagnose after 5 weeks and $700 in unnecessary repairs. Took it to George at Diesel Tune, and he found the issue within hours--a broken downpipe. He also pointed out a few other concerns, and now my 180k-mile truck runs and rides like new. George is a great communicator, honest, and clearly knows his stuff. Highly recommend Diesel Tune for anyone looking for reliable, knowledgeable diesel service! read more

10 out of 10 service Diesel tune is number one in my book Every time I go in there, they knock it out of the park and go above and beyond. I'm just very thankful this is a shop that you can trust. I would highly recommend this shop. All my friends and family come here. read more

Diesel Tune - Auto Repair Near Me - Downey, California

Amazing went well! Very honest and helpful explains everything in detail. We are very happy with the service provided. He was able to fix our diesel truck and no one has been able to fix it so we are very happy customers. We will be bringing in our other diesel truck in the future. read more

I highly recommend Diesel-Tune for anyone needing work on their diesel truck. I had a few engine codes pop up, and they pinpointed exactly what was wrong--nothing more, nothing less. They only replaced what truly needed fixing. Big thanks to George for taking the time to explain everything clearly, including the potential damage if the issues were left unresolved. Not once did I feel pressured or upsold on unnecessary work. Honest shops with fair pricing are hard to come by, but Diesel-Tune has definitely earned my trust--and a lifetime customer as long as I own a diesel. Be sure to ask for George! David Black Ford F250 read more

I had a great experience with george at diesel tune. It's hard to find mechanics that are honest, knowledgeable, and don't try to upsell you on things you don't need, but these guys were exactly that. They took the time to explain what was going on with my truck, showed me the issue, and walked me through the repair options without any pressure. The work was done quickly and the price was very fair compared to other places I called. You can tell they really know diesel engines and take pride in their work. My truck has been running great since the repair. Customer service was also excellent everyone was nice. If you're looking for a reliable diesel mechanic that you can trust, I definitely recommend this shop. read more

10/10 ! Took my truck to Diesel Tune and they did a great job. My baby's back on the road and running smooth. George is the best. He was super nice over the phone and explained everything clearly. I really appreciate when the owner is honest and straight with you. Definitely recommend Diesel Tune if you want your truck fixed right. Thanks again guys, hopefully I don't need to come back too soon but if I do I know where I'm going. read more

I've seen Diesel Tune for years so I felt pretty confident they knew their stuff. Sure enough they did! George was great, he informed me about everything they were doing and checked with me before doing anything. They diagnosed the problem quickly and while they fixed the problem George made suggestions on preventive maintenance since they were already working on the transmission. While no repair is cheap the cost was worth it. Will definitely be a repeat customer. read more

Honest. Great Work. Great Value. Diesel-Tune, if you need a reliable and business level repair solution. Been a customer for years, some work was fairly diesel heavy. Diesel water pumps, injectors, other truck repairs. Diesel tune is my exclusive truck repair supplier. Always stands behind warranty part work where required. Only uses the highest quality parts available. Honest. Great Work. Great Value. read more

Brought in my 2018 Ram 1500 for a check engine light and rough idling. George at the front desk was professional and kept me in the loop the whole time. Freddy, the lead tech, diagnosed it quickly as a faulty EGR valve and had it replaced the same day. The truck runs smooth now and feels brand new. No upselling, no games, just honest work and fast turnaround. If you've got a diesel truck and want it fixed right, this is the place to go. read more

Have been taking trucks here for years now. Great communication, and fair pricing. Would recommend for anyone who has big issues to just a simple diagnostic. read more

On my way back from a trip up north, a check engine came up on the dash. A friend from work recommended this spot. I dropped off my car for 2 hours to have it diagnosed and they told me there was a loose connection in the fuel injector system. They fixed it and brought my baby back to life. The final cost was also very good considering the fact that a dealership would charge you 3x extra and misdiagnose you. If you need something done, get it done with Diesel Tune. Speak with George or Freddy, they know what's up. read more

Diesel Tune - The shop banner. - Auto Repair Near Me - Downey, California

George and his team are great. They are the go to Diesel guys in town. They are honest and very hard working. As trucks get older they are the ones to keep them going. read more

Great service friendly front office staff (George) and quality work. Serviced my transmission on my 2009 Dodge Ram truck Diesel.

THIS IS WHERE YOU GO! Just worked on my behemoth Ford F250 1999. No one could diagnose the issue. Enter Diesel Tune! Spot on. Analysis. George is a great man. Expert techs, EXCELLENT PRICING & quick. SHOP IS PERFECTLY LOCATED. Love ya, guys! Thanks for making my HEAVY DUTY HEAVENLY. read more

Very honest mechanic, after my warranty ran out I had to find a Diesel Mechanic for my F250 super duty. Now all my maintenance is done here and any work that needs to be done on my truck. read more

To my diesel truck to this location. I asked them to test my batteries. They kept my truck for 2 days. They wanted to keep it 3 days but I just picked it up. I got charged over $400 and they did absolutely nothing. Total rip off! Don't go there!! I should have taken it to Autozone. read more

Called this shop and they were close , the owner or the manager over the phone just told me how to pass the regeneration on my diesel Isuzu truck and I did it my self . Great guys read more

These guys do excellent work. I took them my 2020 GMC Sierra 2500HD Duramax to have the (CARB Legal) PPE high flow manifold, PPE up-pipes, & PPE down-pipe installed. No leaks or problems ever since the install. It's been over 2 years since I took it and still running strong. Planning on doing the PowerStop Z36 Extreme Truck and Tow 8-Lug Brake Rotor - Pad Kit, Nitro Gear & Axle AAM 11.5-Inch Full Float Rear Axle Shaft; 30-Spline, Nitro Gear & Axle AAM 11.50-Inch Rear Helical Gear Limited Slip Differential; 30-Spline, & the Snow Performance (CARB Legal) SNO-50100-BRD water/methanol kit install. When I receive the parts, I'll be sure to contact these guys to do the install. GOOD JOB GUYS read more

Diesel Tune - Auto Repair Near Me - Downey, California

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Sal has a calm voice and communicates well. He did a general check on my Cummins and repaired or serviced what was needed. Much cheaper than dealer and not bad in pricing. read more

First I will start by saying, bringing a 6.0 with tons of upgrades to a shop that didn't build it, hoping they can fix the issue is a long shot, however Diesel Tune truly did that. George & Sal were extremely helpful when it came to my husbands truck. They answered all his questions. They try their best to have it ready as soon as they can knowing it's his work truck & he needs it as soon as he can have it back. It took a couple times to figure out the main issues, when it comes down to it, it's an amazing truck that didn't have the proper care beforehand. Lots of things were replaced, I mean my husband truly did put his money into this truck. It's not always easy doing that with a shop because you fix one thing, another thing goes wrong, it's just how it is with mechanics, you just have to understand that. I will say though, will all the money & time my husband put in with this shop and his truck, George really came through. He helped us multiple times. The truck is running strong, & that was ultimately the goal being that it's a truck hauling different trailers for multiple businesses'. We just want to say thank you, thank you George, Sal, and the team of mechanics working on the truck. we really appreciate you having the best interest in resolving the issues. read more

Diesel Tune - Auto Repair Near Me - Downey, California

I want to give Diesel tune a huge thank you and shout out for the amazing service and care they provided today. I broke down right outside the shop and walked over hoping to find someone to help. The man who greeted me was so kind and immediately had someone walk over to my car and bring it to the shop. Within minutes they had checked it over, ran the sensors and let me know what to do next. I don't even have a diesel engine and they were still able to fix the sensor issue and got my car back up and running. I have never felt more kindness, care and compassion from mechanics than I did here. Everyone went above and beyond, putting business aside to help someone in need. I truly appreciate everything they did. If you have a diesel engine, take it here, they are truly good people and good at what they do. read more

They specialize in larger diesels. I found their minimum a bit pricey, but they know what they're doing (and not a lot of shops know the intricacies of diesels). read more

Sal was on top of it and was so super helpful! Fixed my son's truck and did not overdiagnose or suggest things that were not wrong. He fixed our truck quickly and was very kind. read more

This is a compliment to Sal and the mechanics at Diesel Tune: they were great in their service! Sal was very accommodating in scheduling our oil change on our 2007 Chevy 3500 with our truck camper attached. His prices were fair and close to half of what other places wanted. The service was completed in about 2 hours. Sal shared his knowledge of diesels with us and he was pleasant in having a conversation and gave us a great Mexican restaurant for us to head to while the service was being completed. We feel like we could trust him and their work. Basically, he treated us as he would like to be treated himself. Can't go wrong with that:). Highly recommend! Thanks, Sal read more

My second time having service done by this group of solid guys I took my 18 ram 3500 6.7 Cummins the first time for an oil change in & out the second time for some emission related issues and they recommended a few extra services they got it done in two days were the dealer wanted a week plus just to get around to Along with that dealer price tag if you questions about anything they do they will explain with no problem even have you talk to the mechanic till you understand joe & sal and the tech have gained a new customer out of me I suggest them for all yo diesel motor issues very knowledgeable group read more

Thank You Mr. George and Your Amazing Employees for handling my situation on my truck. Thank You.

So I've been going to diesel tune for a Few years i have a 06 6.0 ford. I've done some work with them. Like engine work fuel sender radiator alternator and other stuff. Stoped going to them when i was getting the same issues. Like an alternator that lasted less than 2 years when my new mechanic changed it he said it wasn't a motor craft brand like they said. Now the fuel sender was changed twice by diesel tune in less than 40k miles so it went out a 3rd time. That's less than 60k miles now for a third time. My new mechanic did the job again no motor craft fuel sender. It was never installed no wonder it kept going out. Sal at diesel tune is always saying how we're putting motor craft don't worry. Then when I went back for the same issue Sal was like you only have a 10k mile warranty so I paid again 1250$ Spoke with George I told him to pay for one of the jobs since he didn't install what he promised me. Charged me 1250$ both times for an inferior part. His only solution was to bring it back to Diesel Tune. No thanks George I don't trust you anymore which is kind of sad because I feel like you took advantage of me. I already have a new mechanic that I'm comfortable with and hopefully I'll be able to trust him. I'll be posting the Delphi fuel sender that he installed and admitted installing read more

If you've got a vehicle with a Diesel Engine in it. Have these guys be the ones who service it and keep it cherry. George, Sal, John, and the rest of the crew are absolutely 110% professional. They worked with me to the best of their abilities and then some when I was in a pinch to get my truck squared away before my trip east. I will for sure be sending my truck to them so that it will receive the absolute BEST care and run for another 3-400,000 miles. GOOD JOB GUYS!!! read more

Finding a good diesel repair center is tough. I found these guys after my previous mechanic misdiagnosed my truck and I ended up stranded on the highway. This shop provides exceptional customer service, they're courteous, fair and do good work. My fuel pump was replaced by the previous shop, however the gas lines were junk, these guys found this out through their expert analysis. Since then I've had them do my brakes, radiator flush and I have been very happy. I actually came back thinking my rear brakes had an issue with brake chatter and George at no charge identified that the problem was due to my own ignorance and he torqued my rear airbag that was actually making what I thought was brake chatter. read more

Right. So if you've seen my other review for George, Sal and the rest of the Diesel Tune crew, you know I've been a fan. They really are great. But I'm posting this update because they've come through big recently and thought you should know. Since I bought my truck, I've had to make all sorts of repairs. Some I've done myself, some I've tried and had DT fix them for me, and others I've had to bite the bullet and prepare myself for the bank account drain. Welp- it finally happened. My truck blew a gasket and it came time to make the call to sell, junk or get the work done. DT diagnosed my truck, gave me a list of items that need to be done and gave me a cost. It's too much to list here, but the important part is that they did the work, it was exactly what they said they'd do and the cost came in within 10% of the original estimate. I waited until I'd driven it for over 500 miles before posting this. It now runs better than it has since I've owned it and probably as good as the day it came off the lot in 2003. Great guys, fair pricing, honest guidance. I trust these guys with my truck and you should too. read more

These guys have very fair prices and are located right off the freeway if you are in a bind and need somewhere to go for a quick repair . Very helpful and honest read more

Sal and Jon saved me from a huge headache today, and got my megacab back on the road... I was having idle issues with my 6.7 and they quickly diagnosed me and got me back on the road with my trailer for the 6 hour journey home. Can't say enough good things about these guys, fast grade A service for a reasonable price. read more

Diesel Tune - Auto Repair Near Me - Downey, California

I am here diesel tune fix my 2006 dodge sprinter before here i want to another shop this guy told me you need to fix your TURBO cost around $4000 dollar they told me and i bring my van fix to problems diesel tune and they fix my van very easy and not problems.any things you have diesel car van do not go another shop The guys name GRAGE i thinks he is owner very helpful guy .another guys name is SAL he is good people and Costomer service very nice Chang any parts show old parts and show new parts that way no body got cheat and very good prise . Come to fix you diesel car van DIESUL TUNE read more

Diesel Tune - Auto Repair Near Me - Downey, California

I personally do not like writing or talking bad about anyone or an individual place of business so I'll just state Facts... My truck would not not start at all so I got it towed to Diesel Tune being a 2500HD 6.6 GMC because they are the few Diesel specialist in the area, check in with Geranamo told him what was wrong, starter would not crank over batteries had low voltage on them. A few days later he calls me back with a list of other issues the truck had and a 1,500$ estimate ! Said "ok" take care of it. Well they Replaced throttle body Hose clamps Duct seal wtf is a duct seal!? Replaced alternator Ended up with a 1500$ bill whatever not a big deal BUT! 3 weeks later the same thing happens Im STRANDED! The starter would not crank over! I work all over the wester states and when I need my truck I am willing to pay big $$$ for it to be in good working order. Needless to say I was not happy at all! Like I said I don't like writing bad reviews but when I pay a lot of $$& and don't get a good job that really makes me mad! I will say they are great a changing oil and basic servicing, but when you are in a bind and need it fixed well they are not the place to take your diesel to. Sorry. read more

Diesel Tune - Payed Big $$$ not happy - Auto Repair Near Me - Downey, California

Took my truck in 2006 Ford F-350 6.0 powerstroke. Truck had several issues: leaking radiator, white smoke through tail pipe, running way sluggish, and over heating. Read good things about this shop and was recommended through a forum. Truck had blown head gasket, bad oil cooler, and some bad injectors. They recommended to bullet proof the truck. A little over $10k. After some hard thinking decided to do it. Got the truck back and decided to mostly keep it parked as I want it to last (only use it to haul my boat). Not even a gas tank in Radiator started to leak, one reason I took it in. Took it back and they wanted to charge me a little over 400 to get it replaced. Was way upset. They said we can't control what your truck is going to do. After going back and forth dropped it to like 200 and some change In labor, I did a warranty swap through autozone for the radiator. As I didn't use it much, I later realized that my windshield wiper hoses were taken off and never put back. Then as summer came along I had no functioning AC. They may have disconnected the AC for engine work and never refilled it. Last thing, had a superchips flashpaq tuner in the truck that I explained I had put in the truck and asked if that would damage the engine etc. I mentioned i wouldn't use that tune anymore since I wanted this 10k investment to last. Went to try and sell it and find that the tune programming has been used elsewhere ? . Based on my radiator experience when I took it back i decided not to go back as the warranties pretty much don't exist with them. Truck runs good though (only put no more than 2000 miles in like almost a year) except for the other issues so gave 2 stars. I guess check your whole truck before and after u get it. read more