I understand how he feels. I…
I understand how he feels. I have been fighting with General motors on my express 2500 Van. Since it had 7600 miles on it, I have the 8L90 transmission, which has been a nightmare. The valve bodies have been replaced. The transmission control module has been replaced each of those twice.They even put a new transmission in or so they told me. After the new transmission drove it about ten thousand miles and the same hard downshifting started to come into play. I took mine to a Maryland dealership. Many times Koons Chevrolet in White Marsh. Finally, after they had done all the above mentioned work and put a new transmission in. They said there was nothing else they could do. But the vehicle is still at this writing under warranty, so they said, don't worry about it. My question to them and to GM was, what good is a warranty if you can't repair the vehicle.
Koons Chevrolet has even gone so far as to tell GM and myself that they will no longer service my vehicle with anything that has to do with the transmission. I was told that's as good as it's going to get Period! when you slow down, come to a stop, it shifts with a hard thud...it's as if somebody's bumping you from behind like it has from day 1. 2 Valve Body's 2 TCM's 4 reprogramming and a new transmission 8L90 and still having the same problem.