Chevrolet 4500 HD 2023 Manual page 324

buckle up the seat belt. The passengers are
also required to buckle up the seat belts.
Adjust the positions of the steering wheel
and mirrors. Lock the doors. Turn the power
of the dome light or accessories OFF before
starting the engine.
Engine Conditions
Checking the Engine for Startability and
Abnormal Noises
1. Make sure the parking brake is securely
engaged. Step firmly on the brake pedal.
2. Make sure the selector lever is in "P" or
"N" position.
For safety, firmly press the brake pedal
before starting the engine.
3. Turn the engine control switch to start
the engine.
Check that the engine starts quickly with
no abnormal noises.
Checking Condition of the Engine at Low
Speeds and during Acceleration
1. Make sure the transmission is in the "P"
or "N" position and the parking brake is
securely engaged.
2. Turn the engine control switch to start
the engine, and run it to warm up.
3. Check that the engine is running at a
speed within the standard idle speed
range.
During regeneration of the diesel
particulate filter (DPF), the engine idle
speed may increase.
4. Drive the vehicle, making sure the
accelerator pedal does not stick when
gradually accelerating, the engine speed
rises smoothly and it does not knock.
Recommended Daily (Pre-operation)
Inspections
These checks are in addition to, not instead
of, any legally required daily inspections.
See related topics under "Maintenance
Schedule", especially if problems are found.
For safe and comfortable driving, keep
record of the distances driven and the
condition of the vehicle during operation.
Perform inspections at appropriate intervals,
and perform maintenance in accordance
with the findings of the inspections. If an
inspection reveals an abnormality or there
was an abnormality the previous time the
vehicle was driven, have the vehicle repaired
by the nearest dealer before it is driven
again.
Service and Maintenance
1. Components that showed abnormalities
during the previous operation
Check components that showed
abnormalities during the previous
operation
2. Checks performed at the engine
Fan belt looseness and damage
Engine oil level
Engine coolant level
Power steering fluid level
3. Checks performed from the driver's seat
Brake fluid level
Brake pedal free play
Operation of meters, gauges and
warning/indicator lights
Engine startability, abnormal noise
and color of exhaust gases
Parking brake lever stroke
Windshield washer fluid spray
condition and windshield wiper
effectiveness
Windshield washer fluid level
Steering wheel position and free play
Operation of horn and turn signal
lights
Door lock operation
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