Maintenance When Trailer Towing; Trailer Recommendations; Trailer Wiring Harness - GMC 2010 Canyon Crew Cab Owner's Manual

Maintenance When Trailer Towing

The vehicle needs service more often when pulling a
trailer. See Scheduled Maintenance on page 7-3 or the
Index for more information. Things that are especially
important in trailer operation are automatic transmission
fluid, engine oil, axle lubricant, belts, cooling system
and brake system. It is a good idea to inspect
these before and during the trip.
Check periodically to see that all hitch nuts and bolts
are tight.

Trailer Wiring Harness

The vehicle may be equipped with a four-pin trailer
towing harness. This harness has a four-pin trailer
connector that is attached to a bracket on the hitch
platform. The four-wire harness contains the following
trailer circuits:
•
Yellow: Left Stop/Turn Signal
•
Green: Right Stop/Turn Signal
•
Brown: Taillamps/Park lamps
•
White: Ground
5-60

Trailer Recommendations

Subtract the hitch loads from the Cargo Weight Rating
(CWR). CWR is the maximum weight of the load
the vehicle can carry. It does not include the weight of
the people inside, but you can figure about 150 lbs.
(68 kg) for each passenger. The total cargo load must
not be more than the vehicles CWR.
Weigh the vehicle with the trailer attached, so the
GVWR or GAWR are not exceeded. If using a
weight-distributing hitch, weigh the vehicle without the
spring bars in place.
The best performance is obtained by correctly spreading
out the weight of the load and choosing the correct
hitch and trailer brakes.
For more information see Towing a Trailer on page 5-48.