GMC Sierra Classic 2007 Owner's Manual page 199

Example of Eight Dip Switches with Two Positions Example of Eight Dip Switches with Three Positions
Your panel of switches may not appear
exactly as they do in the examples above, but
they should be similar.
The switch positions on your hand-held
transmitter may be labeled, as follows:
•
A switch in the up position may be labeled
as "Up," "+," or "On."
•
A switch in the down position may be
labeled as "Down," "−," or "Off."
•
A switch in the middle position may be
labeled as "Middle," "0," or "Neutral."
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