GMC 2010 T-Series Owner's Manual page 91

Instrument Panel Brightness
Turn the knob clockwise or counterclockwise to dim or
brighten the instrument panel lights.
Dome Lamps
The dome lamp switch can be set to three different
positions: DOOR, OFF, and ON.
DOOR : The dome lamp only comes on when the
driver's door is open.
OFF : The dome lamp will not turn on, even when the
door is opened.
ON : The dome lamp remains on whether or not the
door is open.
For vehicles with this
feature, the knob is
located on the lower right
of the instrument panel.
Rear Reading Lamps
When pressed in, an indicator light inside the button
comes on.
Because the truck may be finished in a variety of
different ways by a number of companies, the function
of this switch depends on how the vehicle was finished
after it left the factory. Refer to the other manuals that
came with the vehicle to learn more about this switch,
or see your dealer/retailer for more information.
For vehicles with a rear
lamp button, it is located
on the lower left side of
the instrument panel.
See Instrument Panel
Overview on page 3 4.
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