2002 GMC Envoy with 159k. Starting it up has no problem and engine runs. Push on the gas and it revs up. Putting it in ANY gear and it just does not move. For a while there was a clicking noise under the vehicle, which i thought was the transmission. It started to die out on the freeway...

Tccm/pcm/bcm work independant of each other?....... Curious if the Bravada/Trailblazer pcm/ tccm /tcm work independently of one another......Studies indicate yes!!! Does the pcm really care which tcccm/t-case is used?.... If so is it something that can be re-calibrated/reflashed.... My...