If you mean engine light yes, That's probably OBD1. Dealers have the ability to type commands or reflash (udate) etc. but basically they usually don't actually go "bad" needing replacement but that can be done as well if it is actually faulty.
In the trunk or passenger compartment
Cadillac does not use inertia/reset switches.
How do you reset dashboard codes for 2000 Cadillac STS?
How to reset the theft system on 1997 Cadillac Seville
I have a 2002 cadillac dts and the radio will not come on. Is there a code to reset it.
how do u reset the anti theft system on a 1989 cadillac eldorado
undo battery cables from battery and hold posotive and negative together for 5 minutes or so
Disconnect the negative battery connection for 30 minutes and the light will reset. However it will come back on if you have not repaired the problem that caused it to come on in the first place.
reset po455 on a cadillac srx 2005
reset botton for the alarm
Reset a fuel gauge? There is not reset for a fuel gauge.
You have to reset it with a OBC scanner :-)