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• Normal Ride Height (NRH)/Aero Mode – Indicator
lamps 3 and 4 will be illuminated when the vehicle is
in this position.
• Entry/Exit Mode – Indicator lamp 3 will be illumi-
nated when the vehicle is in Entry Exit Mode. Entry/
Exit mode can be requested up to 33 mph (53 km/h).
If vehicle speed is reduced to, and kept below, 15 mph
(24 km/h) indicator lamp 4 will flash and indicator
lamp 3 will remain solid until Entry/Exit Mode is
achieved at which point indicator lamp 4 will turn off.
• Transport Mode – No indicator lamps will be illumi-
nated. Transport Mode is disabled by driving the
vehicle.
• Tire/Jack Mode – Indicator lamps 3 and 6 will be
illuminated. Tire/Jack Mode is disabled by driving the
vehicle.
• Wheel Alignment Mode – Indicator lamps 3 and 4 will
be illuminated. Wheel Alignment Mode is disabled by
driving the vehicle.
AIR SUSPENSION SYSTEM (2500/3500 MODELS)
— IF EQUIPPED
Description
The air suspension system is a rear leveling ride height
system. The main purpose of this system is to maintain
the truck’s rear ride height level.
5
STARTING AND OPERATING 535
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