Indicator Light - Buick 2007 Rainier Owner's Manual

The ignition has to be on for the system to inflate,
in order to raise the vehicle to the standard ride
height after loading. The system can lower
the vehicle to the standard ride height after
unloading with the ignition on and also for up to
30 minutes after the ignition has been turned off.
You may hear the compressor operating when you
load your vehicle, and periodically as the system
adjusts the vehicle to the standard ride height.
Load leveling will not function normally with the
inflator hose attached to the inflator outlet.
Remove the inflator hose from the outlet during
loading and unloading.
If the vehicle is parked for an extended period of
time, some bleed down of the suspension is
normal. Upon starting the vehicle, proper height
will be achieved.
Overload Protection
The air suspension system is equipped with
overload protection. Overload protection is
designed to protect the air suspension system,
and it is an indicator to the driver that the vehicle
is overloaded. When the overload protection
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mode is on, it will not allow damage to the air
compressor. However, do not overload the vehicle.
See Loading Your Vehicle on page 330.
If the suspension remains at a low height, the rear
axle load has exceeded GAWR (Gross Axle Weight
Rating). When the overload protection mode is
activated, the compressor operates for about
30 seconds to one minute without raising the
vehicle depending on the amount of overload.
This will continue each time the ignition is turned on
until the rear axle load is reduced below GAWR.

Indicator Light

The indicator light on the inflator switch in the rear
passenger compartment also serves as an
indicator for internal system error. If the indicator
light is flashing without the load leveling function
or the inflator being active, turn off the ignition.
The next day turn on the ignition and check
the indicator light. The vehicle can be driven with
the light flashing, but if it is you should have
the vehicle serviced as soon as possible.