Hummer H2 2010 Owner's Manual page 176

To program up to three devices:
1. To verify if you have a Fixed Code garage door
opener, remove the battery cover on your hand
held transmitter supplied by the manufacturer of
your garage door opener motor. If you see a row of
dip switches similar to the graphic above, you have
a Fixed Code garage door opener. If you do not
see a row of dip switches, return to the previous
section for Programming Universal Home
Remote Rolling Code.
Your hand held transmitter may have between
eight to 12 dip switches depending on the brand of
transmitter.
3-58
Your garage door opener receiver (motor head
unit) may also have a row of dip switches that can
be used when programming the Universal Home
Remote. If the total number of switches on the
motor head and hand held transmitter are different,
or if the dip switch settings are different, use the
dip switch settings on the motor head unit to
program your Universal Home Remote. The motor
head dip switch settings can also be used when
you do not have the original hand held transmitter.
Example of Eight Dip Switches with Two Positions