One problem related to warning light on has been reported for the 2000 Cadillac Deville. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 Cadillac Deville based on all problems reported for the 2000 Deville.
Air bag warning light comes on. After doing some research on the internet it seems to be related to a wiring problem underneath the driver's seat. I confirmed this by moving the seat which causes the light to come on or go out. Since this is a safety related problem which might inactivate the air bags, I believe that this should be handled by a recall notice by gm and the burden to repair the loose wire connection should fall upon gm. Thanks.