Chevrolet Low Cab Forward 2023 Manual page 144

Air suspension dump warning light
When the parking brake is applied and the
air suspension dump switch is pressed, the
vehicle height will decrease. The air
suspension dump warning light in the
instrument panel inside the cab and the
switch indicator light (amber) will come on
at the same time.
To return the vehicle height to the normal
position, press the air suspension dump
switch again. The air suspension dump
warning light and the switch indicator light
will go out.
Warning
When the parking brake is applied while
the air suspension dump switch is in the
dump position, the vehicle height will
decrease. Since it is very dangerous, be
sure to check that the parking brake is
applied before pressing the air suspension
dump switch.
If the air pressure in the air tank decreases,
changing to the dump position or the
normal position may not be possible. If this
occurs, start the engine to increase the air
tank pressure.
When the air suspension dump switch is
pressed while the parking brake is not
applied, the switch indicator light will come
on but the air suspension dump warning
light in the instrument panel will not come
on as the system has not dumped any air.
Driving and Operating
Air Suspension System Service and
Maintenance
Air Dryer
Change the desiccant and the filter's rubber
parts of the air dryer at the intervals
specified by the Maintenance Schedule. Take
care to ensure that the drain port is not
blocked or obstructed by foreign material.
The air dryer removes moisture and oil that
is present in the vehicle's air piping by
means of an inside desiccant.
If water and oil is discharged when the
drain tap on the air tank is opened for
checking, the desiccant has deteriorated and
needs be changed. Desiccant replacement
143