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July 2023
John is a gentleman and a great mechanic. You don’t find that combination too often these days.
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February 2023
John knows diesel engines. Duramax, Powerstrock or Cummins. His pricing is very fair. These things aren't cheap to work on. With his help, I expect to get at least a half million miles out of my 04 LB7 Duramax
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December 2022
Terrible customer service and over torqued my lug nuts to where I had to drill out the wheel studs, also over torqued my fuel filter. Asking for small things like checking the tps system seems to be beneath them. Got the impression they are more into mods than maintaining. Good luck Griffith, I won't be going back again.
