Hummer 2007 H2 Owner's Manual page 129

m Q
4 (Four-Wheel-High Lock): Use this
mode when you need extra traction in most
off-road situations such as sand, mud, snow, or
level, rocky trails.
n Q
4 (Four-Wheel-Low Lock): This mode
delivers extra torque to all four wheels and is used
for extreme off-road conditions. You might
choose Four-Wheel-Low Lock if you are driving
off-road in deep sand, mud, or snow and climbing
or descending steep hills.
When in this mode you can also choose to lock
the rear axle for additional traction in extreme
off-road situations. See Locking Rear Axle
on page 311.
Notice: Operating your vehicle in
Four-Wheel-Low Lock above 50 mph (80 km/h)
for any extended period of time could cause
damage to the transfer case. Do not operate
your vehicle in Four-Wheel-Low Lock above
50 mph (80 km/h) for extended periods.
CAUTION:
{
Shifting the transfer case to NEUTRAL
can cause your vehicle to roll even if the
transmission is in PARK (P). You or
someone else could be seriously injured.
Be sure to set the parking brake before
placing the transfer case in NEUTRAL.
See Parking Brake on page 133.
N (NEUTRAL): Shift the vehicle's transfer case to
NEUTRAL only when towing your vehicle. See
Recreational Vehicle Towing on page 369 or
Towing Your Vehicle on page 369 for more
information.
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