Chevrolet 4500 HD 2023 Manual page 121

120 Driving and Operating
Stopping Distance
The stopping distance of a vehicle involves
reaction time and braking distance. Deciding
to push the brake pedal is reaction time.
Applying the brake pedal until the vehicle
comes to a complete stop is braking
distance. Average reaction time is about
three-fourths of a second. But that is only
an average. It might be less with one driver
and as long as two or three seconds or
more with another. Age, physical condition,
alertness, coordination and eyesight all play
a part. Braking distance will vary based
reaction time, the amount of force applied
to the brake pedal and the speed of the
vehicle.
When driving, bear the stopping distance in
mind. Maintain a speed and headway
distance that allow you to stop safely even
if a hazard occurs.
Overriding Accelerator with Brakes
In the unlikely event the accelerator pedal
becomes stuck, apply the brakes firmly and
steadily to reduce engine power and bring
your vehicle to a safe stop. Turn the engine
off, move the selector lever to the P (Park)
position, and apply the parking brake. In a
safe location, inspect the accelerator pedal
for any interference and remove the item
causing the interference, if any is found.
If none is found and the condition persists,
have your vehicle towed to the nearest
authorized dealer.
Braking Techniques
For the most effective braking and for
maximum life from brake system
components, follow these suggestions when
possible:
Apply the brakes gradually as road and
load conditions permit. Reduce pedal
pressure as speed drops so that a very
light pressure is used at the end of
the stop.
Do not pump the brake pedal as this will
only deplete the vacuum reserve.
To get maximum braking while
maintaining vehicle control, use a
"squeeze" braking technique. Do this by
pushing on the brake pedal with steadily
increasing pressure. If possible, steer
around obstacles when there is not
enough room to stop.
Brake System Warning Light
Caution
If brake low vacuum warning light or
brake system warning light comes on
during operation, have brake system
checked immediately.
Refer to Warning Lights, Gauges, and
Indicators 0 50.
When the Brakes Do Not Work
Warning
It is very dangerous to suddenly pull the
parking brake lever all the way while
moving at high speed. Reduce speed first
by shifting down and then gradually pull
the parking brake lever.
You and others could be seriously injured.
The exhaust brake should be turned on as
soon as service brake malfunction is
detected. This will slow the engine speed.
With the engine speed under control and