I bought this truck a little over a year ago. Mileage 89,392. 2 weeks later the truck started to run poorly, shaking badly, misfiring. Took it to the garage. They told me the had to replace coil packs one one side lifters and one push rod. Truck ran good for 1 year. I know this because I had just gotten it inspected. A couple days later the truck started doing the same thing. Now itas in the garage again. They tell me the camshaft is shot and needs replaced including all the lifters. The truck now has just over 100,000 miles on it. The repair is about $6600.00. GM will allow the garage to do some work under a warranty type citation and GM will pay approximately $535.00. For a total of about $1000.00. Now my concern is this truck could break down on the highway and cause an accident just like a current recall for crankshaft and or connecting rods. If there can be a recall for that there should be a recall on this issue also. The garage has informed me they have done a lot of these repairs. Some even had to come back a second time.