Hummer 2006 H3 - Manual (Page 232)

Here are some things you must not do if you stall,
or are about to stall, when going up a hill:
• Never attempt to prevent a stall by shifting into
NEUTRAL (N) to rev-up the engine and regain
forward momentum. This will not work. Your vehicle
will roll backwards very quickly and you could go
out of control.
Instead, apply the regular brake to stop the
vehicle. Then apply the parking brake. Shift to
REVERSE (R), release the parking brake,
and slowly back straight down.
• Never attempt to turn around if you are about
to stall when going up a hill. If the hill is steep
enough to stall your vehicle, it is steep enough to
cause you to roll over if you turn around. If you
cannot make it up the hill, you must back straight
down the hill.
Q:
Suppose, after stalling, I try to back down the
hill and decide I just cannot do it. What should
I do?
A:
Set the parking brake. If you have an automatic
transmission, shift to PARK (P). Turn off the
engine. Leave the vehicle and go get some help.
Exit on the uphill side and stay clear of the path
the vehicle would take if it rolled downhill. Do
not shift the transfer case to NEUTRAL when
you leave the vehicle. Leave it in some gear.
{ CAUTION:
Shifting the transfer case to NEUTRAL
can cause your vehicle to roll even if the
transmission is in PARK (P), or, if you have
a manual transmission, even if you are in gear.
This is because the NEUTRAL position on
the transfer case overrides the transmission.
You or someone else could be injured.
If you are going to leave your vehicle, set the
parking brake and shift the transmission to
PARK (P), or, put the manual transmission in
FIRST (1). But do not shift the transfer case
to NEUTRAL. Leave the transfer case in the
Four-Wheel High, Four-Wheel-High Lock,
or Four-Wheel-Low Lock position.
Driving Downhill
When off-roading takes you downhill, you will want to
consider a number of things:
• How steep is the downhill? Will I be able to maintain
vehicle control?
• What is the surface like? Smooth? Rough?
Slippery? Hard-packed dirt? Gravel?
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