GMC 2012 Sierra - Manual (Page 284)

Black plate (8,1) GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
9-8 Driving and Operating
. Use headlamps even during the
day to make the vehicle more
visible.
{
WARNING
Driving to the top of a hill at high
speed can cause an accident.
There could be a drop-off,
embankment, cliff, or even
another vehicle. You could be
seriously injured or killed. As you
near the top of a hill, slow down
and stay alert.
. Never go downhill forward
or backward with either the
transmission or transfer case in
N (Neutral). The brakes could
overheat and you could lose
control.
{
WARNING
If the vehicle has the two‐speed
automatic transfer case, shifting
the transfer case to N (Neutral)
can cause your vehicle to roll
even if the transmission is in
P (Park). This is because the
N (Neutral) position on the
transfer case overrides the
transmission. You or someone
else could be injured. If leaving
the vehicle, set the parking brake
and shift the transmission to
P (Park). Shift the transfer case to
any position but N (Neutral).
. When driving down a hill, keep
the vehicle headed straight
down. Use a low gear because
the engine will work with the
brakes to slow the vehicle and
help keep the vehicle under
control.
{
WARNING
Heavy braking when going down
a hill can cause your brakes to
overheat and fade. This could
cause loss of control and you or
others could be injured or killed.
Apply the brakes lightly when
descending a hill and use a low
gear to keep vehicle speed under
control.
If the vehicle stalls on a hill:
1. Apply the brakes to stop the
vehicle, and then apply the
parking brake.
2. Shift into P (Park) for an
automatic transmission
or 1 (First) for a manual
transmission and then restart
the engine.
. If driving uphill when the
vehicle stalls, shift to
R (Reverse), release the
parking brake, and back
straight down.