GMC 2014 Sierra Denali 3500HD Owner's Manual page 268

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automatically shift to lower gears as
it adjusts to driving conditions. This
means that all gears below that
number are available. When 5 (Fifth)
is selected, 1 (First) through 5 (Fifth)
gears are automatically shifted by
the vehicle, but 6 (Sixth) cannot be
used until the plus/minus button
located on the steering column lever
is used to change to the gear.
Range Selection Mode controls the
vehicle and engine speed while
driving down a hill or towing a trailer,
by allowing you to select a desired
range of gears.
Grade Braking is not available when
the Range Selection Mode is active.
See
for more information.
While using the Range Selection
Mode, Cruise Control and the Tow/
Haul Mode can be used.
If the vehicle has the Allison
Transmission, or the Hydra-Matic
6-Speed Automatic Transmission
with the 6.0L engine, it has a Low
Traction Mode that assists in vehicle
acceleration when road conditions
are slippery, such as with ice or
snow. While the vehicle is at a stop,
select the second gear range using
Range Selection Mode. This will
limit torque to the wheels helping to
prevent the tires from spinning.
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 driving
down steep hills or mountain
grades, 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
and
for more
information.
Also see Tow Haul Mode under
more information.
Tow/Haul Mode Grade Braking is
only enabled while the Tow/Haul
Mode is selected and the vehicle is
not in the Range Selection Mode.
See Tow/Haul Mode listed
previously and
. Tow/Haul Mode Grade
Braking assists in maintaining
desired vehicle speeds when driving
for

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