GMC 2005 Sierra 1500 Pickup, Owner'S Manual, Page: 185 / 574

Your vehicle may also have reading lamps in other
locations. To turn the lamps on or off, press the button
located next to the lamp. The lamps are fixed and
cannot be adjusted.
Cargo Lamp
The cargo lamp button is
located on the left side of
the instrument panel.
Press the button to turn
the cargo lamp on.
Press the button again to
turn it off.
An indicator light on the instrument panel cluster will
illuminate when the cargo lamp is turned on, and
the ignition key is turned to RUN.
Accessory Power Outlets
With accessory power outlets you can plug in auxiliary
electrical equipment such as a cellular telephone or
CB radio.
Your vehicle may have two accessory power outlets, or
may have one accessory power outlet located near
the cigarette lighter, if equipped. The cigarette lighter is
designed to fit only in the receptacle to the right of
the accessory power outlet.
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