Tow/Haul Mode - GMC 2011 Sierra Denali Owner's Manual

While using the Range Selection
Mode, Cruise Control and the
Tow/Haul Mode can be used.

Tow/Haul Mode

The vehicle has a Tow/Haul Mode.
The Tow/Haul Mode adjusts the
transmission shift pattern to reduce
shift cycling, providing increased
performance, vehicle control, and
transmission cooling while towing or
hauling heavy loads.
Press the button located on the end
of the shift lever to turn Tow/Haul on
or off. While Tow/Haul is on, a light
on the instrument panel cluster
comes on.
See Tow/Haul Mode Light on
page 5 26 for more information.
Also see Tow Haul Mode under
Towing Equipment on page 9 80
for more information.
Grade Braking
The Grade Braking shift modes can
be activated by pressing the button
on the end of the shift control lever.
While in Range Selection Mode,
Grade Braking is deactivated
allowing the driver to select a
desired range of gears.
Grade Braking is only active while
the Tow/Haul Mode is selected and
you are not in the Range Selection
Mode. See Tow/Haul Mode listed
previously and Manual Mode on
page 9 42 for more information
on the Range Selection Mode.
Driving and Operating
Grade Braking assists in
maintaining desired vehicle speeds
when driving on downhill grades by
automatically implementing a shift
schedule that utilizes the engine
and transmission to slow the
vehicle. This reduces wear on the
braking system and increases
control of the vehicle. Grade
Braking monitors vehicle speed,
acceleration, engine torque, and
brake pedal usage. Using this
information, it detects when the
truck is on a downhill grade and the
driver wants to slow the vehicle by
pressing the brake.
Also see Towing Equipment on
page 9 80 for more information.
Cruise Grade Braking
Cruise Grade Braking assists when
driving on a downhill grade.
It maintains vehicle speed by
automatically implementing a shift
schedule that uses the engine and
the transmission to slow the vehicle.
9-43