Occasionally my 1999 Cadillac Deville'* windows, radio, truck release, gas cap release quit working all at once but after time they all begin working again. I've been looking around the internet for a fix and I think it is the Rear Integration Module? Don't know where it'* located or if that'* the problem.
I also have a dashboard that is not displaying correctly, it'* just a bunch of unrecognizable characters.
It is a low mileage 1999 Cadillac, 97,000 miles.
Your assistance on these issues would be greatly appreciated.