FIRST OFF... Short Summary- I strongly Recommend Dana Brothers Automotive... My first repair was leaking fluid. 2003 Silverado 3500K 6.6 LB7. Old Truck but love my truck like others do. To find a Diesel shop who have so far excited my expectations in service and Diesel mechanical skills. During my first visit additional work was recommended and I approved the work. I was traveling to Florida and staying for a couple of months. I need confidence in my truck and the people who keep me on the road. When I returned to Phoenix I needed more work on my truck. I noticed another leak and another appointment. Leak coming from valve covers. Discovered another shop over tighten rocker assembly cracked and damaged... Dana Brothers tracked down parts , Canada had the parts needed. ( GM ) . Since my truck would out of commission getting the parts 2 1/2 weeks they loaned me a vehicle. THANKS . Everyone knows how much car rentals are even if you can find one. We just got my truck back and we are scheduled to go to Colorado Springs. We got there and I noticed a spot of fluid on the ground. Climbed under , took vido pictures, sent to Dana Brothers and they felt it was coolant. I checked and Reservoir was low. Dana Brother recommended a Shop to diagnose the leak. Not related to repairs done by Dana Brothers. Harry's Automotive in Colorado Springs did the diagnose but did not have lift that would carry my truck. Harry kept my truck overnight then recommended Master Tech Automotive in Colorado Springs. They also took me and finished the job the same day I picked up truck from Harry's. DANA BROTHERS GOT HARRY'S TO SEE ME NEXT DAY , HARRY GOT MASTER TECH AUTOMOTIVE THE SAME DAY. No one has ever coordinated so much between three repair shops ever and I'm 71 yrs young. LONG STORY and you made it this far then you may made your decision. You won't regret this choice. I full time in my 5th Wheel I need my truck and depend on having repairs done right. Thanks for your attention and time. Sincerely, Wilbur