Well, upon further research, most of the wiring from the 3100 harness pins out exactly the same as the 3800 harness from the 97 GP GT. So, what doesn't pin out the same, would be rectified: some wires added, some removed. Obviously, it would take a little time, but since most of it is the same, it won't be near as bad as I originally thought. As far as the 98-99 Monte Carlo harness, I don't have access to one of those vehicles, and it would be hit or miss if it had the 4T60 trans as it was offered with both depending on options. PCM plugs in...most of the wiring would plug in...I think I'm going to give it a go. Now I just need to talk to my junk guy.
