When my Chevy 3500 Diesel Pick-up Truck developed an issue with its Transmission Control Module (TCM) I took it to the Chevy dealer. When that dealer didn't fix it I had it towed to a second Chevy dealer. When it looked like the second dealer wouldn't be able to make the repair, I called Precision Auto Service in Sacramento. I spoke with Rick. After days of dealing with the problem, I had gained some knowledge concerning TCMs (essentially a computer that helps the vehicle's transmission be as efficient as possible). From speaking with Rick, I could tell he knew his stuff. I explained the problem and asked if Precision Auto would be able to fix it, in the event the second dealer could not. Rick assured me they could make the repair. Next, Rick asked me about my warranty with Chevy. My truck is six years old and has 63K miles - well over the warranty - or so I thought. Rick educated me as to the Federal Emissions Warrant that goes beyond the GM warranty. I looked into it as neither dealer had mentioned it. Chevy was able to make the repair and was ready to bill me over $900. Because of Rick's technical expertise and his mentioning of the Federal Emissions Warranty, I knew the dealer wasn't being 'up front' regarding coverage under warranty. In the end, I didn't pay a dime! Next time my truck has any need at all I will have Precision Auto Service do the work. Before I could write a Yelp review on this business, I wanted to personally visit Precision Auto Repair; I had dealt with them over the phone only up to this point. I met Rick and his business partner Scott. Both very personable and knowledgeable. I viewed the business and the repair bays. Precision Auto Service is clean, well run, and professional automotive repair shop.