NHTSA Complaint #11586112 — 2016 GMC SIERRA 1500

My truck only has 40,000 miles on it and has the 8 speed 8L90 transmission. The truck bucks hard and has majorly delayed acceleration, especially on the initial startup of the vehicle. At this point the torque converter is going bad as well as the transmission fluid temperature sensor as per my mechanic when hooked up to the computer. It is now causing a fluttering of the RPMs, especially when the vehicle heats up after running for several minutes. It is severely impacting my fuel economy as well as my general safety when operation my truck. This is a known problem with this type of transmission but so far there has been no recall issued, only a class action lawsuit that I am having a hard time joining. It is going to cost me over $8000 for a new transmission and I don't really know where to turn at this point or what to do! Please make GM issue a recall for this known transmission problem that they put in millions of vehicles, all having similar problems as my own! Thank you!