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October 2023 by Deanna Morgan
Trenton at Mad Diesel Workz had my truck for 5 days and couldn’t fix the problem. He tells me to bring it back @ $200 per hour for diagnostic. No thanks I’m never going back. Waste of time and completely unprofessional.
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July 2023 by ron braasch
Great shop diagnosed my issue and had it fixed in 2 hours. Reasonable price and good work. 2k cheaper than dealership
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May 2023 by Adrian
Not even sure how they received stars. Worst shop I have ever dealt with. Well, I thought at first. ZERO COMMUNICATION. I mean ZERO. They messed up my truck and sent it to their buddies at Chino Hills Transmission. That was even worse. Cost me $4,000 and problem still exist. Don’t even want to take back with “their warranty” knowing my truck will be gone again for 3 months “working on it”
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March 2023 by Michael G.
When it rains it pours! They tried stealing my Chevy 2500 back in January. They punched out the door lock and ripped the column apart and destroyed the ignition trying to start it. Luckily they didn't. I was still able to get it started with my key if messed with it and juggled it around. February rolls around and registration is due in about a month. All of a sudden my check engine light comes on. I take it to a shop in Downey, they scan it and tell me its my EGR valve and cooler. They quote me some ridiculous price. So I call my buddy Paul and tell him about it and he says there crazy. Take it to my "buddies shop Mad Tech" ask for Trenton. Went by there and after talking with Trenton for about 5 minutes I knew I was in the right place. He told me that he really doubts it's my EGR valve in cooler because they rarely if ever go out. So he scans it and he was right! I had a bad M.A.F. sensor and 2 bad glow plugs. He suggested that I do all 4 on that bank since it was already apart and glow plugs are cheap. When he was scanning it he also noticed my door lock broke and my Ignition all messed up and he said he could fix that for me also. While working on it he noticed my font end will need some work in the future. No pressure on doing it now. Just something you will need to address when yoy can. Trenton is straight up HONEST. My truck will go to no other place but to Trenton from now on. I cannot recommend this shop enough.
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March 2023 by Joseph T.
Took my truck to Trenton and his Team and they were amazing! Professional and Courteous. They were honest and quick with their work. Shoutout to Andrew for the knowledge he game me about work I want on the truck and shoutout to Trenton for his professionalism!
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February 2023 by Brad P.
Found a great place for diesel truck service and repairs. Owner is extremely knowledgeable on all types of diesel engines, their functionality and maintenance needs. His staff have the same expertise and are helpful answering your questions.
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January 2023 by shaun alexander
Outstanding customer service, honest quality work. I would high recommend. I don't usually give reviews but they deserve more than 5stars
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January 2023 by Jason G.
So I have a 6.0. Just had for about 3 months and there was black smoke coming out of the exhaust. I looked on YouTube to help me out. I went a got some parts to try to fix it. But that did not work. I found this shop not to far from the house. Give them a call. I explain what was going on with my truck. The guys on the told me with I mite be to bring it in. But do not drive it have AAA bring it. He was telling me, that if a drove the truck more I mite brake more. Finding out that the cost of a diesel mechanic is very expensive. I took his advice.
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December 2022 by David Haro
Very clear about work done and work needing to be done. Friendly and reasonable pricing. Will be going back
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October 2022 by Mike Millias
They new exactly what my problem was. I felt Very comfortable. The workers are very helpful. They got me fix and back on the road. It’s like new again. I have been driving my F350 diesel for three months now with no issues. I recommend them 100%. Thanks Trenton.
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September 2022 by Robert R.
Trenton is the best around for diesel repair. I had my oil pan changed and my turbo boot fixed and the work was was perfect.
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August 2022 by stephen j.
For all you guys that have Diesel trucks, I highly recommend you see Trenton (Owner) he is a fantastic guy and service is excellent!!!
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July 2022 by Brooke Bernath
Have been looking for a good desiel mechanic since moving to California and finally found it. Came in with a handful of issues on my 2014 Ram 2500 Turbo Desiel that I had just purchased and Trenton was super helpful in making sure we resolved them all.He was happy to diagnose the issues with me and talk through the repairs I needed before starting any work to make sure I was on board.Dropped off and picked up my truck today and it is running better than ever. Would not take my truck any where else!Good pricing too!
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June 2022 by Heather H.
Trenton got us out of a tough spot today and we couldn't be happier. Knowledgeable and helpful in every way. We will definitely recommend to all our friends and family and will always be appreciative! Thank you Trenton!
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June 2022 by Nick Simion
Called mad tech a Thursday afternoon and let them know I’m planning on flying in and buying a private party diesel and wanted a shop to do a quick 30 min inspection before I did. Every other shop either said they’re too busy or they don’t deal with duramax. Guy over the phone was super polite and said they can squeeze me into the busy schedule. Got to the shop all the techs were very nice and the main guy I dealt with, Trenton, is the man! Guy is knowledgeable, thorough, and made it a great customer experience, if I ever need diesel work done in LA they will forsure get a returning customer out of me :) thank you mad Tech Diesel Workz!
