Trailer Connections; Power Take-Off (Pto) - GMC 2005 T-Series Owner's Manual

Trailer Connections

Heavy-Duty Trailer Wiring Package
Your vehicle may be equipped with an eight-wire trailer
towing harness. This harness, with a seven-pin
universal heavy-duty trailer connector, is attached to a
bracket on the platform hitch.
The Center High-Mounted Stoplamp (CHMSL) wire is
tied next to the trailer wiring harness for use with
a trailer.
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: CHMSL
•
Red: Battery Feed
•
Dark Blue: Trailer Brake

Power Take-Off (PTO)

United States
Your vehicle may be equipped with power take-off (PTO).
The PTO switch is located on the instrument panel.
Before using a PTO, refer to the manufacturer's or
installer's instructions.
Canada
4-37