At approximately 14,000 miles my 6.2L V8 engine had a lifter go bad on the truck. GMC covered this with warranty at the time. The truck seemed to perform well until I hit approximately 94,841 miles and then a lifter went bad again. I had an 85,000 warranty and this repair was not covered. I was quoted $6,500 to repair the truck by the dealer. I made a social media post and tagged GMC. GMC reached out to me directly and took $1,000 off of the repair and I paid $5,576.48 out of pocket to repair the lifters. GMC also offered an extended 2 year warranty on the engine at that point that is expires in September of 2025. I currently have 143,000 miles on the truck and my intent was to drive this truck for as long as humanly possible. I was told that this was designed to be a 500,000 mile truck. My engine is now burning approximately 2.5 to 3.5 quarts of oil between oil changes and I’m worried that there is something else wrong with the engine and that another lifter will go bad. I love my truck and can’t afford another $6,500 to $10,000 repair. I sometimes get this car and other cars serviced for an oil change at the Mavis Auto in my neighborhood and the shop director who has been in the business has a friend who is a mechanic with GMC and he told me that his friend was given directive that if one lifter went bad 100% of the lifters, the housing and CAM shafts were to be replaced. (I’m not a mechanic so I may be missing some details here) Anyway — I’ve been informed about the NHTSA Investigation Into the V8 Engine in my truck which has opened my eyes to other mechanical defects associated with my truck. I’d like to make this report to protect myself and my investment. I do not want incur additional expenses related to manufacturer defects and I do not want to feel unsafe on the road with this vehicle.