Winter Driving - Chevrolet 4500 HD 2023 Manual

Driving Uphill or Downhill
Downshifts are performed for two main
purposes:
For engine braking on a steep and/or
long downward slope
For responsiveness and economy on an
uphill slope
Red zone (r/min) is 3,100 and above
Drive at a speed that does not cause the
tachometer needle to enter the red zone.
Uphill
Shift down well ahead of time in order to
avoid a heavy load to the engine.
Downhill
Be careful not to drive too fast on a
downhill road.
Use the same gear(s) that you used to
drive up the hill. Also, use the exhaust
brake in order to avoid going too fast.
Do not let the engine overrun.
When going down on a steep slope, avoid
driving the vehicle backward as much as
possible. Drive it forward slowly on the
down slope.
Compared with forward movement,
backward movement involves longer
braking distances and slower steering
response rates.
If you must drive the vehicle backward,
drive it very carefully and gradually and
stop frequently.
Engine Braking : Engine braking is the
braking effect that occurs when you release
the accelerator pedal while driving. The
lower the gear, the stronger the engine
braking.
Exhaust Brake : The exhaust brake is a
system that closes the exhaust pipe and
uses the force of the exhaust emissions to
enhance the effectiveness of engine braking.
Driving and Operating
Overrunning : An engine overrun is an
engine-speed increase that causes the
tachometer needle to enter the red zone.
It is dangerous because it can cause engine
failure.

Winter Driving

Caution
To avoid damage to the wheels and
brake components, always clear snow and
ice from inside the wheels and
underneath the vehicle before driving.
Recommendations for Driving in Cold
Regions
The following recommendations apply to
snowbound regions and to mountainous
regions, ski resorts and other areas of
extreme cold and/or snowfall. Please follow
them also for reference in winter in other
regions.
For the sake of your vehicle, make the
winter preparations described in the links
below. Also have these preparations made
before driving to a cold region.
See Engine Oil 0 242.
See Engine Coolant 0 250.
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