Four-Wheel Drive, Suspension And Towing Controls - Hummer 2008 H2 Getting To Know Manual

18
Getting to Know Your H2
During cooler conditions, the low tire
pressure warning light may appear when
the vehicle is first started and then turn
off as you start to drive the vehicle. This
could be an early indicator that your tire
pressures are getting low and need to
be inflated to the proper pressure.
Note: The Tire Pressure Monitor can alert
you about low tire pressure, but it doesn't
replace normal monthly tire maintenance.
See Section 5 of your Owner Manual.
Four-Wheel Drive, Suspension
and Towing Controls
Four-Wheel
Drive Modes
The transfer
case knob,
located on
the center
of the instru-
ment panel,
allows you
to shift into
and out of
the following four-wheel drive modes:
S
4 (Full-Time Four-Wheel Drive):
Used for on-road driving and light off-
road driving. When shifting, the vehicle
should be traveling less than 40 mph.
S
4 (Four-Wheel-High Lock): Used
for most off-road situations. When shift-
ing, the vehicle should be traveling less
than 40 mph.
T
4 (Four-Wheel-Low Lock): Used
for extreme off-road conditions. When
shifting, the vehicle should be traveling
less than 3 mph with the transmission in
Neutral.
The indicator lights on the control knob
show the selected mode of the transfer
case. Refer to Section 2 of your Owner
Manual for shifting instructions.
Locking Rear
Axle
The locking rear
axle provides
additional rear-
wheel traction
when driving
in off-road
conditions such
as mud, snow,
sand, steep
hills and uneven
terrain.
To lock the rear axle:
1. Place the transfer case in the Four-
Wheel-Low Lock mode.
2. Stop the vehicle and then press the
(Locking Rear Axle) button (A) on
the center of the instrument panel.
Wait for the indicator light to stop
flashing and remain illuminated.
The locking rear axle will automatically
disengage above 20 mph.
Tow/Haul Mode
The Tow/Haul mode is useful when
towing or hauling a heavy load. It
reduces the frequency of transmission
shifts or automatically downshifts to
utilize engine braking to improve the
control of vehicle speed.
Press the (Tow/Haul Mode) button
(B) located on the center of the instru-
ment panel to turn the Tow/Haul mode
on or off.
Selectable Extended Rear Ride Height
(if equipped)
This feature is part of the optional
electronically controlled air suspension
A
B
C