Chevrolet Low Cab Forward 6.7L 2022 Owner's Manual page 277

276 Service and Maintenance
Checking Condition of the Engine at Low
Speeds and during Acceleration
1. Make sure the transmission is in the "P"
(only models with P-range) 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.
Warning
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.
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
Slack adjuster stroke check
Exhaust sound from brake valve
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
4. Checks performed during a walk around
the vehicle
Illumination, flashing, contamination,
damage and obstruction of lights
Contamination, damage and
obstruction of windows, mirrors, and
reflectors
Leaf spring damage
Oil, engine coolant, fuel, and power
steering fluid leaks
Water separator
Drain moisture from air tank
5. Checking wheels and tires
Air pressure