GMC 2009 Sierra - Manual (Page 276)

Here are some things to consider as you approach
a hill.
• Is there a constant incline, or does the hill get
sharply steeper in places?
• Is there good traction on the hillside, or will the
surface cause tire slipping?
• Is there a straight path up or down the hill so you
will not have to make turning maneuvers?
• Are there obstructions on the hill that can block
your path, such as boulders, trees, logs,
or ruts?
• What is beyond the hill? Is there a cliff, an
embankment, a drop-off, a fence? Get out and walk
the hill if you do not know. It is the smart way to
find out.
• Is the hill simply too rough? Steep hills often have
ruts, gullies, troughs, and exposed rocks because
they are more susceptible to the effects of erosion.
Driving Uphill
Once you decide you can safely drive up the hill, you
need to take some special steps.
• Use a low gear and get a firm grip on the steering
wheel.
• Get a smooth start up the hill and try to maintain
your speed. Do not use more power than you
need, because you do not want the wheels to start
spinning or sliding.
{ CAUTION:
Turning 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.
• Try to drive straight up the hill if at all possible. If
the path twists and turns, you might want to find
another route.
• Ease up on your speed as you approach the top of
the hill.
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