2009 GMC SIERRA 1500 towing

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Page 390 of 602

GMC SIERRA 1500 2009  Owners Manual Weight of the Trailer Tongue
The tongue load (A) of any trailer is an important weight
to measure because it affects the total gross weight
of the vehicle. The Gross Vehicle Weight (GVW)
includes the

Page 397 of 602

GMC SIERRA 1500 2009  Owners Manual If the vehicle’s brake, anti-lock brake or StabiliTrak
systems are not functioning properly, the ITBC system
may not be fully functional or may not function at all.
Make sure all of these systems ar

Page 400 of 602

GMC SIERRA 1500 2009  Owners Manual The Trailer Output will indicate “------’’ontheTrailer
Brake Display Page whenever the following occur:
No trailer is connected.
A trailer without electric brakes is connected
(no DIC message is

Page 401 of 602

GMC SIERRA 1500 2009  Owners Manual 3. After the electrical connection is made to a trailer
equipped with electric brakes:
A TRAILER CONNECTED message will be
brie�y displayed on the DIC display.
The Trailer Brake Display Page will appe

Page 403 of 602

GMC SIERRA 1500 2009  Owners Manual Driving with a Trailer
{CAUTION:
When towing a trailer, exhaust gases may collect
at the rear of the vehicle and enter if the liftgate,
trunk/hatch, or rear-most window is open.
Engine exhaust contain

Page 404 of 602

GMC SIERRA 1500 2009  Owners Manual Following Distance
Stay at least twice as far behind the vehicle ahead as
you would when driving the vehicle without a trailer. This
can help to avoid situations that require heavy braking
and sudden

Page 405 of 602

GMC SIERRA 1500 2009  Owners Manual Driving On Grades
Reduce speed and shift to a lower gearbeforestarting
down a long or steep downgrade. If the transmission is
not shifted down, the brakes might have to be used so
much that they would

Page 407 of 602

GMC SIERRA 1500 2009  Owners Manual Maintenance When Trailer Towing
The vehicle needs service more often when pulling a
trailer. See this manual’s Maintenance Schedule
or Index for more information. Things that are especially
importan