Electronically Controlled Air Suspension System - Hummer H2 2009 Owner's Manual

To use this feature, ensure that the following conditions
are met:
•
The engine must be running.
•
All doors must be fully closed. The suspension will
not raise or lower if a door is open.
•
The vehicle speed must be less than 40 mph
(64 km/h). The system will not activate otherwise.
Press the height control button to raise the rear of the
vehicle.
A light in the button will begin to flash as the rear of
the vehicle rises. Once the extended height has been
reached (this may take up to a minute), the warning light
will stop flashing and will stay lit while the vehicle is at the
extended height.
To lower the vehicle to the normal ride height, press the
button again. The light in the button will flash as the
suspension lowers. When the light in the button stops
flashing and goes out, the suspension has reached
the normal ride height.
This feature will lower the vehicle to the normal height if
vehicle speed exceeds 40 mph (64 km/h).
This feature may also be used when ascending,
descending or cresting a steep hill to help prevent the
rear bumper from dragging on the base of the hill
or prevent the vehicle from grounding out (high
centering) on the crest of the hill.
Do not use this feature when towing a trailer.
Electronically Controlled Air
Suspension System
With this feature, the electronically controlled air
suspension keeps the rear of the vehicle level under all
load conditions. The system maintains the vehicle at the
currently selected ride height. There are two ride heights:
Normal Ride Height and Extended Ride Height. The
Extended Ride Height feature is only available if the
vehicle speed is below 40 mph (64 km/h). If the vehicle is
at Extended Ride Height and the speed exceeds 40 mph
(64 km/h), the system will automatically return the vehicle
to Normal Ride Height.
The activation and
deactivation of the
Extended Ride Height
feature is controlled by
this switch on the
instrument panel.
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