Chevrolet 2010 Tahoe Owner's Manual page 213

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