20 Most Recent 2003 Cadillac Deville - Page 6 Questions & Answers

There is a small ice cube relay under dash .If your not sure what it looks like buy one from auto parts store.it just plugs in.to a set of wires on a plug .just unplug the old and plug in the new. Should only go one way.

no. traction is on shifter lever

most likely passlock sensor and reprogram key to new sensor, look for incorrect but valid code in bcm, any other security codes as well

Please confirm its electronic or mechanical. For mechanical when you push a bottom on parking lever it disengage the teeth of paul(gear ) and thus parking brake are released.

what is a sunpass? no response when I Googled sunpass

The parts stores sell a cleaner specifically for it. You take the air tibe off of it, make certain that it is not energized, (unplug it) then spray it a few timess

Cadillac codes are easy to read..then replace the bad sensors etc and then clear the codes and try again etc

speedo drive on it's way out normally gear on drive worn or missing teeth

u have a bad ignition switch or the wrong key

update use Cd's