Chevrolet Suburban 2007 Owner's Manual page 176

Be sure that people and objects are clear of the
garage door or security device you are
programming. When programming a garage door,
it is advised to park outside of the garage.
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 a panel of DIP switches is present. If not,
your garage door opener is a rolling code device.
176
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. Make sure that your key is in the
ACCESSORY position and the engine is off
while programming the transmitter.
2. Remove the battery cover of the hand-held
transmitter.