I just got an 03' P71 PCM for my 01'GM. I dropped it in and my car ran like crap. It shifted REAL nice but couldn't get any acceleration. Temp light stays on as well.
I have a suspicion that this PCM may be for another year. You get what the salvage yard gives you.
I will tinker tomorrow. Meanwhile, I'll try to find a web site to decode the part number and find out what year it really is.
I was told that it might need a "re-learn". Anybody got any knowledge regarding this?
Anyway, I "MAY" have a PCM for sale, CHEAP............