GMC 2010 T-Series Owner's Manual page 92

Auxiliary Power Jacks
These jacks provide 12-volt power to operate things,
such as a citizen's band (CB) radio or a cellular phone.
There will be positive (red) and negative (black) outlets.
They are protected by a 15-amp circuit breaker.
Notice: If you plug in FM communications
equipment at the cigarette lighter, you could
damage the vehicle. Over time, the high heat from
the equipment could damage wires and/or start a
fire. Do not plug in FM communications equipment
at the ashtray area.
3-16
For vehicles with these
power jacks, they are on
the console to the right of
the driver's seat.
Ashtray(s) and Cigarette Lighter
For vehicles with an ashtray and a cigarette lighter, they
are located in the center floor console. To open the
removable ashtray, flip open the top.
Notice: If papers, pins, or other flammable items are
put in the ashtray, hot cigarettes or other smoking
materials could ignite them and possibly damage
the vehicle. Never put flammable items in the
ashtray.
To use the cigarette lighter, push it in all the way and let
it go. When it's ready, it will pop back out by itself.
Notice: Holding a cigarette lighter in while it is
heating does not let the lighter back away from
the heating element when it is hot. Damage from
overheating can occur to the lighter or heating
element, or a fuse could be blown. Do not hold
a cigarette lighter in while it is heating.