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November 2023 by Jay McAllister
Phenomenal business. These guys are absolute diesel experts. I brought my F-350 in for routine maintenance and they found the cause of every issue it had and didn’t charge me any extra for the diagnostic. The truck is running like a BEAST now!On top of that Zach called me on the weekend to update me on the repair status. He started off the call saying “sorry to bother you on the weekend, but I have an update on your truck”. Are you kidding me? Bothering me? I love these guys! I definitely invited Zach to my baby shower. Zach knows how to run a business and McKenna couldn’t be any friendlier up front! Looking forward to maintenance down the line so I can happily pay these guys more money.5 star service.
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November 2023 by Jaker 0815
Where can I even begin absolutely amazing shop and staff! After my 1997 f250 had its up pipes mangled by another shop I took it to Diamond diesel and they did not disappoint. Zack and his team made quick work diagnosing my truck, and squeezing me in quickly for the repair. They did an amazing job and I would like to personally thank Zack and his whole team for the amazing work. Best diesel techs around. Will be taking my truck there from now on for any repairs I need done. Highly recommend!
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January 2023 by kristen franz
A friend recommended Diamond Diesel to me and they did not disappoint! Had a few minor things that needed to be done, Zack and his crew had it fixed up and ready to go in 2 days. They are very honest people here, thank you again for the quality service!Service: Transmission
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November 2022 by matt moruzzi
Hands down best diesel service around, performance work or maintenance/fleet, Zack and his crew do honest and quality work for a price no others can compare too.
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August 2022 by Albert Lowe
Stopped by to ask a couple questions. Was given good answers to questions asked and given best recommendation for product I was looking for. Will shop here in near future.
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November 2021 by Nenad Radojevic
Zack and his buddies know what they are doing. Best service ever. Bring all kind of diesel vehicle and they'll take care of you. I'll stay with them for the rest of my life. My VW Jetta is not an car anymore it's plane.Thank you guys.P.S. Nenad
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July 2021 by Katherine Cunningham
friendly staff !
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June 2021 by Justin Kraus
Brought my cutaway e450 6.0 van in for a knockin noise and thought it was the engine. They diagnosed a bad vacuum pump and they repaired it promptly. I will definitely call them again next time my van needs repairs.
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February 2021 by Max Kinast
Great place to work with
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December 2020 by Colin Stuntz
Took my 18 cummins in for some new tuning since the last two shops couldn’t get it right. Left very satisfied
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May 2020 by Joe Dunigan
I highly recommend Diamond Diesel & Auto Zach work on my Silverado today and diagnosed what was wrong fixed the problem and got me back on the road!! Thanks
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March 2020 by Jason White
Zack is the best diesel mechanic shop in illinois guaranteed work done right the first time second to none even fixes other shops mistakes new diesel are expensive but zack is more than fair.trust the best Diamond Diesel
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January 2020 by Jake Ruhbeck
Zack was able to fit me in his busy schedule yesterday for a coolant leak on my Cummins. He had the problem diagnosed and repaired in a couple of hours. Nice shop with a great owner. Thanks Diamond Diesel
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January 2020 by Michael R Coffey Jr
Owner is very knowledgeable and helpful. Would recommend if you need any repair large or small.
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December 2019 by Lizz Manning
After practically a brand new front end and all new injectors and tires. I feel like I’m driving a brand new truck again Zach does great work and I highly recommend him.
