Cruise Control - Chevrolet Silverado 4500HD 2022 Manual

222 Driving and Operating
The system is controlled by the Air
Suspension Dump (ASD) switch in the center
stack. This switch controls solenoids, which
direct air to the suspension dump and
height valve.
Pressing the ASD switch when the vehicle is
in PARK and the ignition key is in ON/RUN
position releases air supplied to the rear
suspension, lowering (dumping) the rear air
suspension for loading. The indicator on the
ASD switch illuminates.
When the vehicle is shifted out of PARK, air
is filled into the system and the indicator on
the switch turns off.
Vehicles with air suspension have a low
pressure warning lamp immediately to the
right of the ASD switch. The suspension may
refill slowly if this lamp is on.
After passing through the air dryer,
incoming compressed air is stored in the air
tank, which is located just behind the step
used to access the driver side door. The air
tank collects most of the remaining
moisture that was not removed by the air
dryer. A heated air dryer is also optional.
Drain the tank (1) every day at the end of
the trip by opening the drain cock (2) on the
end of the tank. This will purge collected
water and prevent ice formation inside the
tank when the vehicle is shut off in cold
weather.
Make sure the drain passage is not plugged.
For ease of draining, some or all air tank
drain valves may be equipped with optional
pull cords. There must be some air pressure
in the system to ensure proper drainage.
Close the drain cock after all moisture has
been expelled.

Cruise Control

Warning
Cruise control can be dangerous where
you cannot drive safely at a steady
speed. Do not use cruise control on
winding roads or in heavy traffic.
Cruise control can be dangerous on
slippery roads. On such roads, fast
changes in tire traction can cause
excessive wheel slip, and you could lose
control. Do not use cruise control on
slippery roads.
With cruise control a speed of about
40 km/h (25 mph) or more can be
maintained without keeping your foot on
the accelerator. Cruise control does not work
at speeds below about 40 km/h (25 mph).
If the cruise control is being used and the
Traction Control system (TCS) begins to limit
wheel spin, the cruise control will
automatically disengage. When road
conditions allow you to safely use it again,
cruise control can be turned back on.
If the brakes are applied, cruise control
disengages.