I have a 1991 Cutlass Cruiser SL Station Wagon with a 3.3L V6, and 49,000miles on it.
When sitting in park in my garage the car seems to be struggling to find an idle RPM. I just got back my mechanic and he thought it was the IAC, so I replaced it and the problem still exists. Also, when shifting from park to reverse, or from reverse to drive the RPM's drop drastically almost stalling the car out. In fact, this morning after starting the car I shifted from park to reverse and it stalled.
If I haven't provided enough specific information please let me know, I'm new to GM cars and this forum.
Thank you very much.