GMC 2011 Sierra Denali Owner's Manual page 293

use N (Neutral) only. Also, use
N (Neutral) when the vehicle is
being towed.
WARNING
Shifting into a drive gear while the
engine is running at high speed is
dangerous. Unless your foot is
firmly on the brake pedal, the
vehicle could move very rapidly.
You could lose control and hit
people or objects. Do not shift
into a drive gear while the engine
is running at high speed.
Notice: Shifting out of P (Park)
or N (Neutral) with the engine
running at high speed may
damage the transmission.
The repairs would not be
covered by the vehicle warranty.
Be sure the engine is not running
at high speed when shifting the
vehicle.
D (Drive): This position is for
normal driving. It provides the best
fuel economy for the vehicle. If you
need more power for passing, and
you are:
Going less than about 55 km/h
(35 mph), push the accelerator
pedal about halfway down.
Going about 55 km/h (35 mph) or
more, push the accelerator all
the way down.
D (Drive) can be used when towing
a trailer, carrying a heavy load,
driving on steep hills, or driving
off-road. You may want to shift the
transmission to a lower gear
selection if the transmission shifts
too often.
Downshifting the transmission in
slippery road conditions could result
in skidding; see Skidding under
Loss of Control on page 9 6.
When temperatures are very cold,
the transmission's gear shifting may
be delayed in providing more stable
shifts until the engine warms up.
Driving and Operating
Shifts may be more noticeable with
a cold transmission. This difference
in shifting is normal.
M (Manual Mode): This position
lets drivers select the range of gears
appropriate for current driving
conditions. See Range Selection
Mode under Manual Mode on
page 9 42.
Notice: 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 in order to reduce
rapid upshifts and downshifts.
This shift stabilization feature is
designed to determine, before
making an upshift, if the engine will
9-41