GMC 1996 Sonoma Owner's Manual page 147

"urning or driving across steep hills can be
dangerous.
You
could lose traction, slide
sideways, and possibly roll over. You could be
seriously injured or killed. When driving up hills,
always try to go straight up.
Ease up on your speed as you approach the top of
the hill.
Attach a flag to the vehicle to make you more visible
to approaching traffic on trails or hills.
0
Sound the horn as you approach the top of the hill to
let opposing traffic know you're there.
Use your headlamps even during the day. They make
you more visible to oncoming traffic.
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.
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