Locking Rear Axle - Hummer 2003 H2 Owner's Manual

Locking Rear Axle

The locking rear axle can give you additional traction
from the rear wheels when you are driving in off
situations such as mud, snow, sand, steep hills and
uneven terrain.
1. Place the transfer case in the 4LO Lock mode.
This is the only mode which will allow you to lock
the rear axle. See "All
more information regarding the transfer case.
2. Press the button with the vehicle stopped or moving
less than 2 mph (3 km/h).
You must wait for the light in the button to stop flashing
and remain illuminated before the rear axle is locked.
Driving forward a few feet at less than 2 mph (3 km/h)
may also help to engage the rear axle.
-
road
The button used to turn this
feature on or off is located
above the transfer case
buttons to the right of the
steering wheel.
To lock the rear axle
do the following:
-
Wheel Drive" in the Index for
NOTICE:
Do not try to lock the rear axle if the vehicle is
stuck and the tires are spinning. You can damage
drivetrain components and this damage would
not be covered by your vehicle's warranty.
Lock the rear axle before attempting situations
or navigating terrain which could possibly cause
the vehicle to become stuck.
The locking rear axle will be disabled when the
vehicle's wheel speed is greater than 20 mph (32 km/h),
if the vehicle's battery is low and/or the transfer case is
shifted out of 4LO Lock.
NOTICE:
Do not use the locking rear axle on pavement.
You can damage drivetrain components and this
damage would not be covered by your vehicle's
warranty. Use only 4HI when traveling on dry
pavement.
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