GMC Chevrolet Tahoe 2012 Manual page 39

Chevrolet Tahoe and GMC Yukon/Yukon Denali Hybrid - 2012
Spinning the tires or
holding the vehicle in one
place on a hill using only the
accelerator pedal may damage
the transmission. The repair will
not be covered by the vehicle
warranty. If you are stuck, do not
spin the tires. When stopping on
a hill, use the brakes to hold the
vehicle in place.
The vehicle has a shift stabilization
feature that adjusts the transmission
shifting to the current driving
conditions to reduce rapid upshifts
and downshifts. If the shift
stabilization feature determines that
a current vehicle speed cannot be
maintained, the transmission does
not upshift. In some cases, this
may appear to be a delayed shift,
however the transmission is
operating normally.
Manual Mode
Range Selection Mode
The Range Selection Mode controls
the vehicle's transmission.
To use this feature:
1. Move the shift lever to the
M (Manual Mode).
2. Press the plus/minus button to
upshift or downshift selecting the
desired range of gears.
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.
Black plate (9,1)
Driving and Operating
The vehicle can automatically shift
to lower gears as it adjusts to
driving conditions. When 3 (Third) is
selected, 1 (First) through 3 (Third)
gears are automatically shifted by
the vehicle, but 4 (Fourth) cannot be
used until it is selected.
The 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.
When you move the shift lever into
M, the transmission will default to
M4. In this gear range, effective
engine braking occurs at speeds
above 72 km/h (45 mph).
Pushing the minus ( ) button on the
shift lever reduces the gear range.
9-9