I am new to this forum have a 97 GMC C1500 350(5.7L) 4L60E trans and wanting to swap over to the 411 PCM. Have read that I need a 2002 Chevrolet Express Van wiring diagram to complete the pcm swap. Anyone have 1997 to 2002 wiring pinout and what splices etc need to be made and who can flash the 411 PCM?