Hummer 2004 H2 - Manual (Page 262)

Q:
Are there some things I should not do when
driving down a hill?
A:
Yes! These are important because if you ignore
them you could lose control and have a serious
accident.
• When driving downhill, avoid turns that take you
across the incline of the hill. A hill that is not too
steep to drive down may be too steep to drive
across. You could roll over if you do not drive
straight down.
• Never go downhill with the transmission in
NEUTRAL (N). This is called “free-wheeling.”
Your brakes will have to do all the work and could
overheat and fade.
Q:
Am I likely to stall when going downhill?
A:
It is much more likely to happen going uphill. But if
it happens going downhill, here is what to do.
• Stop your vehicle by applying the regular brakes.
Apply the parking brake.
• Shift to PARK (P) and, while still braking, restart the
engine.
• Shift back to a low gear, release the parking brake,
and drive straight down.
• If the engine will not start, get out and get help.
Driving Across an Incline
Sooner or later, an off-road trail will probably go across
the incline of a hill. If this happens, you have to
decide whether to try to drive across the incline. Here
are some things to consider:
• A hill that can be driven straight up or down may be
too steep to drive across. When you go straight up
or down a hill, the length of the wheel base (the
distance from the front wheels to the rear wheels)
reduces the likelihood the vehicle will tumble
end over end. But when you drive across an incline,
the much more narrow track width (the distance
between the left and right wheels) may not prevent
the vehicle from tilting and rolling over. Also,
driving across an incline puts more weight on the
downhill wheels. This could cause a downhill
slide or a rollover.
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