John is by far one of the most knowledgeable people I have ever met when it comes to diesel trucks & honestly anything mechanical whether it be your work truck, race truck, or tow truck, any truck.Grizzli is the 1 stop shop for all your diesel needs. Pricing is beyond fair, communication is not a problem with John, he did a turbo swap on my truck and sent me many photos through the process. John goes up and out of his way to make sure that things are A1 on the vehicles that he touches. No one else will ever touch my trucks again!!!!!!

Had an S&B cold air intake installed on my 2020 RAM 2500 by grizzly diesel. Absolutely love the sound and the noticeable acceleration that you get from these cold air intake‘s and you can rest assured that John will professionally install it without any issues. I highly recommend Grizzly Diesel for all your diesel truck needs. There pricing is very fair and everyone was very professional and John and his crew will do your truck right the first time. It’s Definitely Worth coming here for all your mechanical and truck maintenance issues and needs.

Best diesel work in the midwest! Truck went to the dealer twice for the same problem and they never figured it out. John fixed it right the first time. Been taking my truck ever since and will never take it anywhere else! Very honest!

Great mechanic. Good work and good prices

Johns a great guy and does great work always takes care of me and my 6.0!!!

Super nice guy. Definitely recommend him

Very friendly and knowledgeable service!