GMC Silverado 2022 Manual page 277

Chevrolet/GMC Silverado/Sierra/Sierra Denali 2500 HD/3500 HD Owner
Manual (GMNA-Localizing-MidEast-16504136) - 2023 - CRC - 6/8/22
Camper/Fifth-Wheel Trailer Wiring Package
For vehicles without the fifth-wheel/
gooseneck trailer package, the seven-wire
camper harness is under the rear bumper,
attached to the frame near the rear cross
member. A connector must be added to the
wiring harness that connects to the camper.
The harness contains the following
camper/trailer circuits:
Stop/Turn
Yellow/Blue
Signal Left
Stop/Turn Signal
Green/Violet
Right
Tail/Parking Lamps Gray/Brown
Reverse Lamps White/Green
Battery Feed Red/Green
Ground White
Electric Trailer Brake Blue
If equipped with the heavy-duty trailering
option, see Heavy-Duty Trailer Wiring
Harness Package earlier in this section.
When the camper-wiring harness is ordered
without the heavy-duty trailering package, a
seven-wire harness with a seven-pin
connector is at the rear of the vehicle and is
tied to the vehicle's frame.
Trailer Lamps
Always check all trailer lamps are working at
the beginning of each trip, and periodically
on longer trips.
Turn Signals When Towing a Trailer
When properly connected, the trailer turn
signals will illuminate to indicate the vehicle
is turning, changing lanes, or stopping.
When towing a trailer, the arrows on the
instrument cluster will illuminate even if the
trailer is not properly connected or the bulbs
are burned out.
Driving and Operating
Tow/Haul Mode
For instructions on how to enter Tow/Haul
Mode, see Driver Mode Control 0 239.
Tow/Haul assists when pulling a heavy
trailer or a large or heavy load. See Tow/
Haul Mode 0 231.
Tow/Haul Mode is designed to be most
effective when the vehicle and trailer
combined weight is at least 75% of the
vehicle's Gross Combined Weight Rating
(GCWR). See Trailer Weight under Trailer
Towing 0 267.
Tow/Haul Mode is most useful when towing
a heavy trailer or carrying a large or
heavy load:
Through rolling terrain.
In stop-and-go traffic.
In busy parking lots.
Operating the vehicle in Tow/Haul Mode
when lightly loaded or not towing will not
cause damage; however, it is not
recommended and may result in unpleasant
engine and transmission driving
characteristics, heavy or light steering
efforts, and reduced fuel economy.
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