Manual Mode - GMC 2011 Sierra Denali Owner's Manual

9-42 Driving and Operating
be able to maintain vehicle speed
by analyzing things such as throttle
position, vehicle load, and hill grade.
If the shift stabilization feature
determines that a current vehicle
speed cannot be maintained, the
transmission does not upshift and
instead holds the current gear.
In some cases, this may appear to
be a delayed shift, however the
transmission is operating normally.
The vehicle's transmission
uses adaptive shift controls.
Adaptive shift controls continually
compare key shift parameters
to pre programmed ideal shift
conditions stored in the
transmission's computer. The
transmission constantly makes
adjustments to improve vehicle
performance according to the way
the vehicle is being used, such as
with a heavy load. During this
adaptive shift controls process,
some shifts may feel different as the
transmission determines the best
settings for a particular shift.

Manual Mode

Range Selection Mode
On vehicles with a Range Selection
Mode, this feature may be used to
control the vehicle's transmission.
To use this feature, do the following:
1. Move the shift lever to
M (Manual Mode).
2. Press the plus/minus buttons to
upshift or downshift selecting the
desired range of gears for
current driving conditions.
When in M (Manual Mode) a number
displays next to the M, indicating the
current gear that has been selected.
The number displayed in the gear
indicator is the highest gear that can
be used. However, the vehicle can
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 Tow/Haul Mode on page 9 43
for more information.