Took in my 2008 Silverado 3500 Duramax with a troublesome P0101 (mass air flow performance) CEL. Johnathan (service adviser) was extremely helpful laying out a plan of attack to fix the truck. Ended up being a boost leak and instead of just fixing one thing and calling it quits, Steven (service technician) continued digging and found TWO more boost leaks. I truly appreciate their diligence and care. From the pre-service inspection to a thorough check of all other systems at the end, they truly took care of me. (They even found one of my batteries still under warranty was bad) Would recommend this shop to anyone with an diesel!