Chevrolet Low Cab Forward 2023 Manual page 175

174 Driving and Operating
Warning (Continued)
Install tires of the specified size, same
brand and same tread design (including
winter tires) on all wheels. If different
tires are installed, the braking distance
becomes longer and directional control
stability of the vehicle decreases. This is
very dangerous.
The steering wheel during sudden braking
(when the ABS is working) gives you a
feeling slightly different than it does
when the brakes are not applied. Operate
the steering wheel carefully keeping this
in mind.
ABS operation consumes the brake
system air. When the air pressure drops
and the brake air pressure warning light
and the buzzer are activated, immediately
stop the vehicle at a safe place and wait
for the required air pressure to be
recovered before resuming driving.
Driving in sand or on a muddy road may
adversely affect the brakes and ABS sensors.
Wash the vehicle to remove sand and mud
after operating the vehicle in sandy or
muddy conditions.
Before washing the vehicle, provide
necessary protection to prevent water from
being splashed on the ABS components
(sensors and actuators). Especially when
using high-pressure washing, be careful not
to allow water to be directly sprayed onto
the ABS components and their harness
connectors.
These are not signs of ABS malfunction:
Soon after you start the engine, the
sound of valves working may be heard
from the rear of the vehicle or underside
of the cab. This sound is from a self-check
by the ABS system and is normal.
When ABS is properly operating, vibration
is felt on the steering wheel and/or a
mechanical operating sound is heard.
When ABS is activated while the exhaust
brake is in operation, the exhaust brake
may disengage.
ABS is more likely to activate when the
brakes are applied during cornering or
driving over a bump. This is because
wheels that have gone over a bump
would tend to lock due to loss of contact
with the ground.
ABS is not activated immediately after
starting the vehicle. It is activated only
when the vehicle speed reaches approx.
4 MPH (7 km/h). ABS operation is inactive
when the vehicle speed reduces to
approx. 4 MPH (7 km/h).
ABS Operation Indications and Signs
ABS warning light
Operation Indications of ABS
When the engine control switch is placed
into the "ON" position, the ABS warning
light comes on and then goes out in approx.
2 seconds. The ABS is normal if the warning
light goes out.
Operation Signs of ABS
When ABS is activated, slight vibration is
transmitted to the steering wheel and
operating sound can be heard from the ABS
components.
If the ABS warning light does any of the
following, the ABS may be faulty. Please
contact the nearest dealer.