It is safest to have the system cleared using a scan tool, on rare occasions removing power supply can cause BCM programming glitches and then you windup at a dealer to get them reprogrammed properly.
Looking for a Used DeVille in your area?
CarGurus has 1,378 nationwide DeVille listings starting at $1,899.
Search Cadillac DeVille Questions
Cadillac DeVille Experts
Related Models For Sale