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Basic Trailer Wiring Package (Diesel Engine)
Regular and extended cab pickups equipped with a
6.5L Turbo Diesel engine have an eight
towing harness.
The trailer wiring harness with a seven
-
and separate Center High
connector are located at the rear of the vehicle and are
tied to the vehicle's frame.* The harness connector can
-
be plugged into a seven
pin universal heavy-duty trailer
connector available through your GM dealer.
4-66
-
wire trailer
-
pin connector
Mounted Stoplamp (CHMSL)
* The single CHMSL wire is tied to the seven
harness and is used if your trailer or cap are equipped
with a CHMSL.
-
The eight
wire harness contains the following
trailer circuits:
D
Yellow: Left Stop/Turn Signal
D
Dark Green: Right Stop/Turn Signal
D
Brown: Taillamps
D
White: Ground
D
-
Light Green: Back
up Lamps
D
Light Blue: CHMSL
D
Red: Battery Feed
D
Dark Blue: Trailer Brake
If you need to upgrade your vehicle to heavy
trailering, a brake controller harness and a seven
-
universal heavy
duty trailer connector are available
from your GM dealer.
yellowblue
-
wire
-
duty
-
pin
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