GMC 2005 Envoy Owner's Manual page 287

•
Sound the horn as you approach the top of the hill
to let opposing traffic know you are there.
•
Use your headlamps even during the day. They
make you more visible to oncoming traffic.
CAUTION:
{
Driving to the top (crest) of a hill at full 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.
Q:
What should I do if my vehicle stalls, or
is about to stall, and I cannot make it up
the hill?
A:
If this happens, there are some things you should
do, and there are some things you must not do.
First, here is what you should do:
•
Push the brake pedal to stop the vehicle and
keep it from rolling backwards. Also, apply the
parking brake.
•
If your engine is still running, shift the transmission
to REVERSE (R), release the parking brake, and
slowly back down the hill in REVERSE (R).
•
If your engine has stopped running, you will need to
restart it. With the brake pedal pressed and the
parking brake still applied, shift the transmission to
PARK (P) and restart the engine. Then, shift to
REVERSE (R), release the parking brake, and
slowly back down the hill as straight as possible in
REVERSE (R).
•
As you are backing down the hill, put your left hand
on the steering wheel at the 12 o'clock position.
This way, you will be able to tell if your wheels are
straight and maneuver as you back down. It is
best that you back down the hill with your wheels
straight rather than in the left or right direction.
Turning the wheel too far to the left or right
will increase the possibility of a rollover.
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