Light; Wait-To-Start Light; Engine Oil Pressure Light - Chevrolet 4500 HD 2023 Manual

60 Instruments and Controls
Electronic Stability Control (ESC)
Off Light
This light comes on briefly when the engine
control switch is turned to the ON position.
If the light does not come on, have the
vehicle serviced by your dealer. If the
system is working normally, the indicator
light then turns off.
This light comes on when the Electronic
Stability Control (ESC) system is turned off.
If ESC is off, the Traction Control System
(TCS) is also off. To turn ESC off and on, see
Traction Control/Electronic Stability Control
0 184.
If ESC and TCS are off, the systems do not
assist in controlling the vehicle. Adjust
driving accordingly.

Wait-to-Start Light

This light comes on when the engine control
switch is turned to the ON position and
goes out when preheating is complete.
See Starting and Stopping the Vehicle 0 138.

Engine Oil Pressure Light

This light should come on briefly when the
engine control switch is turned to the ON
position, and then should go out after the
engine is started.
This light comes on when the engine oil
pressure has fallen below the normal level
while the engine is running or the oil
pressure across the oil filter rises above the
normal level while the engine is running.
If the warning light comes on while driving,
immediately pull off to a safe place and
stop the engine. Check the oil level in the
engine crankcase. If the oil level is normal,
restrictions are in the oil filter or within the
lubricating system. Have the vehicle
inspected at your dealer.
Do not run the engine with this light on.
It could damage the engine. When this light
comes on while driving, a warning tone also
sounds.
The oil level varies while the engine is
running right after it has stopped or if the
vehicle is on uneven ground. As a result, the
red engine oil pressure warning light may
light up.
When checking the oil level, press the
engine oil level check switch on level ground
while the engine is cool. The red engine oil
pressure warning light in combination with
the green engine oil level indicator light can
indicate if the engine oil level is OK or low.