ad blue GMC SIERRA 2002 Owner's Manual

3-2
Comfort Controls
Heater and Air Conditioning Comfort
Controls
Fan Knob
The knob on the left side of the control panel adjusts the
fan speed. To increase airflow, turn the knob clockwise.
To decrease airflow, turn it counterclockwise. To turn
the fan off, turn the knob to OFF.Temperature Knob
The middle knob on the control panel lets you select the
temperature of the air flowing into the passenger area.
Turn the knob clockwise toward the red area for warmer
air. Turn the knob counterclockwise toward the blue area
for cooler air.
Mode Knob
The right knob on the control panel allows you to
choose the direction of air delivery.
(Vent): This mode directs the air through the
instrument panel outlets and the center floor console
outlets.
(Bi-Level): Air is delivered through the
instrument panel outlets and center floor console outlets,
as well as the floor outlets. The air flow can be divided
between panel and floor depending upon where the knob
is placed. Pressing the A/C button while in this mode
causes cooler air to come out of the instrument panel
outlets and center floor console outlets and warmer air
to come out of the floor outlets.

4-58 Trailer Wiring Harness
Heavy-Duty Trailer Wiring Package
Your pickup is equipped with the eight-wire trailer
towing harness. This harness with a seven
-pin universal
heavy
-duty trailer connector is attached to a bracket on
the hitch platform.
The Center High
-Mounted Stoplamp (CHMSL) wire is
tied next to the trailer wiring harness for use with a
trailer, slide
-in camper or cap.The eight
-wire harness contains the following
trailer circuits:

Yellow: Left Stop/Turn Signal

Dark Green: Right Stop/Turn Signal

Brown: Taillamps

White: Ground

Light Green: Back
-up Lamps

Light Blue: Center High
-Mounted
Stoplamp (CHMSL)

Red: Battery Feed

Dark Blue: Trailer Brake
A jumper harness for an electric trailer brake controller
and a trailer battery feed fuse are included with this
trailering package. (See ªInstrument Panel Jumper
Wiring Harnessº later in this section.)
If you need to tow a light
-duty trailer with a standard
four
-way round pin connector, an adapter connector is
included with your vehicle. See ªFour
-Wire Trailer
Harness Adapterº later in this section.