Chevrolet Silverado 4500HD/5500HD/6500HD Owner Manual (GMNA-
Localizing-U.S.-12102101) - 2019 - crc - 10/2/18
236
Driving and Operating
Caution
Do not repeatedly brake or
accelerate heavily when TCS is
off. The vehicle driveline could be
damaged.
To turn off TCS, press and release
g
. The traction off light
i
displays
in the instrument cluster. The
appropriate message will display in
the DIC.
To turn TCS on again, press and
release
g
. The traction off light
i
displayed in the instrument cluster
will turn off.
If TCS is turned off and then at
some point the cruise control is
turned on by either set or resume,
TCS will be turned back on and the
i
light will turn off.
Adding accessories can affect the
vehicle performance. See
Air Suspension
Caution
To prevent ride degradation and
suspension damage, the vehicle
must not be operated on the road
without air in the suspension
air bags.
If equipped, the air suspension
maintains vehicle ride quality and
driver comfort.
Air Suspension Air Dump
If equipped, air suspension allows
the rear suspension to be
temporarily lowered by several
inches.
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.