I have a 22 5.3L V8 trail boss 86k miles was running great prior.Truck gears started slipping and was able to get it home. Started the next day and check engine light came on and no reverse. Was able to get it to the dealership with the reduced engine power warning. I dropped it off Friday 2/21 and was immediately diagnosed with the bad valve body issue/code. Service was very vague with me at first and gave me 2 options Valve body replacement with an estimate of $3100.00 or a full transmission of $8,000.00. No mention if this was common when asked. Makes sense as to why they did not drop the pan when I asked if they checked the fluid. If this is a common issue I feel as they were trying to lure me into a new transmission for the extra money. That dsnt give me a great feeling with the dealership or chevy in general. I went with the valve body replacement and he said he would order the parts. I called this past week just for an update and asked about parts and then they alluded that they were on backorder from GM not another dealership and he thought he mentioned that. There is no way to track the parts? No loaners available I rely on my truck a lot for work and transporting my family of 4 around. Not very optimistic after reading thats this is a major problem. Has anyone else experienced the brevity when asking for answers? Has anyone else had to pay for this out of pocket? Im expecting the worst and hoping for the best but not really sure where to go from here other than wait.