GMC 2010 GMC Sierra, Owner'S Manual

Page: 432 / 660

Pulling A Trailer
Here are some important points:
. There are many different laws, including speed
limit restrictions, having to do with trailering. Make
sure the rig will be legal, not only where you live
but also where you will be driving. A good source
for this information can be state or provincial
police.
. Consider using a sway control. See “ Hitches ” later
in this section.
. Do not tow a trailer at all during the first 500 miles
(800 km) the new vehicle is driven. The engine,
axle or other parts could be damaged.
. During the first 500 miles (800 km) that a trailer is
towed, do not drive over 50 mph (80 km/h) and do
not make starts at full throttle. This helps the
engine and other parts of the vehicle wear in at the
heavier loads.
. Vehicles can tow in D (Drive). Shift the
transmission to a lower gear if the transmission
shifts too often under heavy loads and/or hilly
conditions.
Important considerations that have to do with weight:
. The weight of the trailer
. The weight of the trailer tongue
. The weight on the vehicle's tires
. And the weight of the trailering combination
Weight of the Trailer
How heavy can a trailer safely be?
It depends on how the rig is used. Speed, altitude, road
grades, outside temperature and how much the vehicle
is used to pull a trailer are all important. It can depend
on any special equipment on the vehicle, and the
amount of tongue weight the vehicle can carry. See
“ Weight of the Trailer Tongue ” later in this section for
more information.
Trailer weight rating (TWR) is calculated assuming the
tow vehicle has only the driver but all required trailering
equipment. Weight of additional optional equipment,
passengers and cargo in the tow vehicle must be
subtracted from the trailer weight rating.
Use the following chart to determine how much the
vehicle can weigh, based upon the vehicle model and
options.
Weights listed apply for conventional trailers and
fifth-wheel trailers unless otherwise noted.
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