Originally Posted by
1gr869
Hey all,
Bought a black 98 GT with just over 103k. Ran beautifully and suddently threw a rod bearing (we think-haven't torn it completely down yet). Car is in good shape but obviously not well-maintained motorwise.
Found a 3800 from a 03 LeSabre with 1400 (yes 1400) miles on it. Installed new motor and a couple of sensors from the GP. Now getting Service Engine Soon light. Scanner said tranny code P1810. Reset it and tranny shifted great until we got to our destination. Restarted car, engine light came back on and car would not shift out of 2nd. Shut car off, restarted and it shifted fine in all gears again, but engine light still on.
We are using the 03 tranny and MAF, but using the 98 PCM. I'm told in other forums that we have to replace the PCM with an 03 PCM. Can it be reprogrammed using the HP Tuners software or do we really need to buy a different PCM?