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January 2025 by Lucas Lopez
Ordered some 45 overs for lmm durmax super fast turn around time and super nice Dan was super helpful.
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January 2025 by Haden Smith
Came from Oklahoma to Northern Illinois for work, my LML took a crap and Ty and his crew took great care of me. I appreciate them and all they did, I will for sure be sending everyone I know to DDP
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December 2024 by chris perrino
The TCM went out on my 2012 Silverado 3500.
I ordered a new one from Dan’s, received it a day earlier than expected, plugged it in and the truck is running great.
The same day the TCM went out on my 2014 Sierra (same setup).
This module was replace about 2 years ago with an OEM part.
Ordered another from Dan’s Diesel. It arrived promptly, installed in 5 minutes and no issues. No programming needed on either one.
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December 2024 by Christian Escalera
Don't waste your time and money buying from here.
I bought a transmission internal harness and after installing, the plug itself failed and started leaking bad(took to a shop and confirmed by shop plug failed) ok no problem so I tried calling and could barely get ahold of anyone but finally talked to a guy who I explained to and all he could tell me is that he couldn't believe that it failed already and different ways to reinstall it which I tried telling him already the product itself was bad, and if nothing else worked to just buy another one, Ridiculous. So I did buy another one but a real OEM one which I should have in the first place and it has not leaked at all. Save your self the troubles and just buy real OEM parts to not have these issues.
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December 2024 by Alex J
Absolutely phenomenal work done by Tyler and his team. I had dropped my truck off about 2 weeks ago for a shifting problem. They were able too tear the truck apart, found the bell housing and transfer case needed too be replaced, sourced all the necessary parts and had it back too me WITHIN 2 WEEKS!!! Tyler kept me in the loop with absolutely everything and went above and beyond with answering all of my question. If you EVER need anything done too your duramax, look no further!! These guys know their S***t!! I will definitely be using them for all of my duramax needs, thanks again for everything!!!
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December 2024 by Trenton Miller
Customer Service is on point, awesome to deal with!
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November 2024 by Eddie Stringer
Terrible I bought a tcm from them online for an 04 gmc sierra 3500 lb7 and it showed up and and I put it in and drove it around maybe 50 miles to town and back over the coarse of a few days and everything worked great and then I drove it around the block and it started shifting real hard and late and my engine light comes on so I put a scanner on it and I get communication codes u2104, and u2105 so I park it and I call them and it’s already passed 30 days so I can’t get my money back for it so I had to do warranty and so I sent it to them and they got it to pop up the codes and supposedly fixed it and sent it back to me and I plug it in and clear the codes from before and back up to test drive it and don’t make it out the driveway before it throws those codes again.
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November 2024 by Randall Deppe
Only has reman sac injectors for duramax no new stuff. And no one has responded to my question and phone calls don't get answered I won't purchase from here
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October 2024 by Zachary Sharoian
I purchased a Dan's Diesel Performance Stage 1 64MM Turbo, and unfortunately, it has been a series of problems from the start. While the customer service was decent, they often didn’t have clear answers to my questions.
Here’s the main issue: after installing the turbo, I could only drive my truck for about 1,000 miles before the turbo vane position arm got stuck. I sent it back, but they claimed it was due to "abuse," which baffled me since I was driving normally—just like any other responsible driver.
Fast forward to receiving the turbo back. It looked like it had been dropped, but I thought, "No big deal; it still works." I installed it, and for a moment, everything seemed fine—until I drove just 100 miles, and the same problems returned. Once again, the turbo failed, and it’s clear that this Chinese-made product just doesn’t hold up.
In my honest opinion, buying a Dan's Diesel Turbo feels comparable to purchasing a cheap E-bay special. I wouldn’t recommend it.
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October 2024 by Ayden Walaszek
I called regarding employment just to see if they hire people with a CDL A or no experience. The guy who answered the phone had a bad attitude and just muttered “ we don’t need no truck drivers” under his breath and hung up.
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September 2024 by Thomas Harvel
Dan's Diesel answered the phone!! They verified my diagnosis for my 2013 Silverado 2500 Duramax w/Allison Trans of a bad TCM over the phone. I spoke with JD. Ordered a new TCM with their "enhanced tune" and Lifetime Warranty. Part was at my door step within 22hrs. Installed and driving within minutes. JD is very knowledgable and professional. Highly recommended.
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September 2024 by Shian Dunaway
Don’t hold up there warranty!
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August 2024 by Cody Davis
Purchased a new 66mm turbo through Dans Diesel for my LML. Ran into some problems with the VGT actuating correctly after installation, so I reached out to Dan and his team to see what could be done. After troubleshooting what we could, they shipped me out an exchange turbo the next business day.
Great customer service, timely communication, and professional. Will be a returning customer when it comes time for fuel upgrades!
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July 2024 by Gary Hume
Ordered TCM from Dan and had it in 2 days truck shifts smooth and works awesome thank you.
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June 2024 by The Weldor
Awesome place ! Great ppl to deal with ! Highly recommend ther services and products ! Thank you from Colorado
