2007 Cadillac DTS Owner's Manual - Page 142

Programming Universal Home Remote - Fixed Code Fixed Code garage door openers are used for garage doors produced prior to 1996. Fixed code uses the same coded signal every time, which is manually programmed by setting DIP switches for a unique personal code. Follow these steps to program up to three channels: 1. Remove the battery cover of the hand-held transmitter. If you do not know if your garage door opener is a fixed code or rolling code device, open your garage door opener's remote control battery cover. Your garage door opener is a fixed code device if there is a panel of switches. If not, your garage door opener is a rolling code device. Example of Switch Settings 142