Engine Checks Before Operating - Chevrolet Low Cab Forward 6.7L 2022 Owner's Manual

Activating High Idle Mode
Follow the below procedure to activate the
high idle mode:
1. Set the parking brake.
2. Set the selector lever in P (Park) or
N (Neutral) position.
3. Do not press the brake pedal.
4. Press the cruise control main switch to
set it to ON. At this time, the operation
indicating light will turn to green.
5. Turn and hold the cruise control set
switch in the SET position. After
approximately 3 seconds the cruise
control set indicator light will begin to
flash slowly and the engine idle will
increase to 1,200 r/min.
Canceling High Idle Mode
Any of the following actions will cancel high
idle mode.
The cruise control main switch is set
to OFF.
The brake pedal is pressed.
The parking brake is released.
The selector lever is moved from P (Park)
or N (Neutral) position.
The accelerator pedal is pressed,
accelerating the engine beyond the
engine speed threshold.
The cruise set indicator light will stop
flashing and the engine speed will return to
normal.
Driving and Operating
When the engine control switch is turned
on, the indicator light comes on for
approximately 2 seconds and then goes off
automatically.
The indicator light comes on when the
overdrive off switch on the selector lever is
turned on. Overdrive will not operate even
when the automatic transmission is in the
"OD" position, unless engine speed is
excessive.

Engine Checks Before Operating

Checks Before Operating
Allow the engine to warm up before placing
the engine under heavy load driving. While
the engine is warming up under light load,
the following checks should be made:
1. Observe the red engine oil pressure
warning light. The light should go out
when the engine is running. If it stays
on, shut the engine off and find the
cause.
2. Look at the engine coolant temperature
gauge. If the gauge reaches the H (HOT)
area, stop the engine and find the cause
of the overheating.
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