Chevrolet Low Cab Forward 6.7L 2022 Owner's Manual page 263

262 Service and Maintenance
maintenance can prevent malfunction. Also,
if a preventive maintenance schedule is not
followed, or is improperly carried out, no
amount of correct vehicle operation will
prevent malfunction.
If vehicle application, operation and
preventive maintenance schedules and
procedures are followed and properly carried
out, the life of the vehicle will be greatly
extended.
For example, regular attention to the engine
oil is essential. The oil level must be
periodically checked and oil added whenever
needed. Also, the oil should be changed at
the intervals specified with the proper
quality and viscosity of oil. If your engine
should run excessively low on oil or if the
oil has lost its lubricating qualities because
of old age, serious engine damage could
occur.
Power Take Off (PTO) and Extended
Idle Use
When the vehicle is used with the PTO
equipment or used in a way that requires
extended idle time, one hour of use shall be
deemed the same as 53 km (33 mi). See
Driver Information Center (DIC) 0 58 for
hourmeter.
Maintenance Schedule Table
Letters Used to Indicate Maintenance Service
Types
A : Adjust
C : Clean
I : Inspect then clean, repair or replace as
necessary
L : Lubricate
R : Replace
T : Tighten to the specified torque