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O P E R A T I N G Y O U R V E H I C L E
Protection Mode
In order to "protect" the air suspension system, the vehicle will enter Protection
Mode when the payload has been exceeded or load leveling cannot be achieved.
Refer to "Electronic Vehicle Information Center (EVIC)/Driver Information Display
(DID)" in "Understanding Your Instrument Panel" in the Owner's Manual on the DVD
for further information.
NOTE:
This mode is intended to be enabled with engine running.
2500-3500 AIR SUSPENSION SYSTEM
The air suspension system provides full time rear load leveling capability for all loading
conditions including towing.
Description
Normal Ride Height (NRH) - This is the
standard position of the suspension and
is meant for normal driving.
Trailer Mode (Lowers the vehicle approxi-
mately 1 in (25 mm) - This position will
lower the rear suspension and provide
load leveling for all loading conditions
including towing a trailer. After the "ALT
Alt Trailer Height Button
TRAILER HEIGHT" button has been
pushed, it will blink continuously until the trailer height has been achieved. The system
requires that the ignition be in the ON/RUN position or the engine running with zero
vehicle speed for all user requested changes. After the engine is turned off, it may be
noticed that the air suspension system operates briefly, this is normal. The system is
correcting the position of the vehicle to ensure a proper appearance.
Trailer Decoupling/Unloading - The air suspension system will load level (lower/
exhaust only) for up to 10 minutes after the vehicle is turned off. This allows for easy
removal of a trailer and/or load from the back of the truck by maintaining the ride
height. After 10 minutes you will need to turn the ignition to the run position for the
air suspension to maintain ride height. If the air suspension system is disabled using
the settings menu (Tire Jack Mode, Transport Mode or Alignment Mode) the system
will remain disabled when the vehicle is turned off. Reactivating the air suspension
can be accomplished via the settings menu or driving the vehicle above 5 mph
(8 km/h) for Tire Jack Mode or Alignment Mode and 16 mph (26 km/h) for Transport
Mode.
NOTE:
While loading, engine must be running for air suspension to maintain the ride height.
Refer to your Owner's Manual on the DVD for further details.
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