Chevrolet 4500 HD 2023 Manual page 118

Do Not Attach Accessories to the
Windshield or Windows
Warning
Do not attach ornaments, films or other
accessories to the windshield or windows.
They would impair visibility. Also, any
plastic suction cups used to attach
accessories could cause a fire or other
accident by acting as lenses.
You and others could be seriously injured.
Never Shut Down the Engine While
Driving
Warning
Do not move the engine control
switch away from the ON position
while the vehicle is being driven.
If the engine is shut down while the
vehicle is moving, the brakes will not
work properly. The engine could also
be damaged.
Warning (Continued)
Shutting down the engine while
driving would be extremely dangerous
because the power steering would
stop working, making the steering
wheel extremely hard to turn.
Shutting down the engine while
driving would be extremely dangerous
because the warning lights, indicator
lights and other electrical circuitry
would completely stop working.
Placing the engine control switch in
the LOCK position while driving
would be extremely dangerous
because the key could come out,
causing the steering wheel to lock so
that you could not turn it.
You and others could be seriously
injured.
Avoid Unnecessary Idling of the Engine
If the engine idles too long, the engine
coolant temperature will fall below the
(Continued)
operating range. Low engine operating
temperature causes several conditions that
are harmful to engine operation and life.
Incomplete combustion of fuel in an engine
that is not fully warmed up causes
Driving and Operating
crankcase dilution and forms lacquer and
gummy deposits on valves, pistons, and
rings. It also causes rapid accumulation of
sludge within the engine.
Driving at Night
Nighttime driving is more dangerous than
daytime driving because the field of view is
narrower. Keep your speed down, and
maintain an ample headway distance.
Metallic Plinking Sound from the Muffler
Immediately after shutting down the engine,
you may hear a metallic plinking sound
from the muffler. This sound occurs as the
muffler cools down and contracts. It does
not indicate an abnormality or breakdown.
When the Silencer and Exhaust Pipe
are Hot
Warning
When the engine is running and
immediately after vehicle operation, the
DPF, silencer, and exhaust pipe are
extremely hot. Be careful not to
inadvertently touch them when working
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