GMC 2001 Envoy - Manual (Page 237)

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D Ease up on your speed as you approach the top
of the hill.
D Attach a flag to the vehicle to make you more visible
to approaching traffic on trails or hills.
D Sound the horn as you approach the top of the hill
to let opposing traffic know you’re there.
D 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 can’t 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’s what you should do:
D Push the brake pedal to stop the vehicle and
keep it from rolling backwards. Also, apply the
parking brake.
D 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).
D If your engine has stopped running, you’ll need
to restart it. With the brake pedal pressed and the
parking brake still applied, shift the transmission
to PARK (P) (or, shift to NEUTRAL (N) if your
vehicle has a manual transmission) 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).