1998 Cadillac DeVille Q&A
1998 Cadillac DeVille Question: PCM programming
If your old PCM does not have an "eprom" the replaceable "chip" is called a "knock sensor module" and MUST be transferred from the old PCM to the new. The new PCM will also need to be programed after it is installed in the vehicle. There are some cases of PCM's coming "pre-programed from the parts house. Try checking around and see what you can find. - Russ
I had a used PCM put in and programmed by dealer, I drove car home but after taking keys out of ignition and went back in and put keys in and it says "starting is disable antitheft " remove key" so...