Chevrolet Low Cab Forward 6.7L Diesel Engine 6500XD (GMNA-Localizing-
U.S.-15749874) - 2022 - CRC - 12/1/21
110
Driving and Operating
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.
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
(Continued)
Warning (Continued)
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
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 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
near them (for example, tilting the cab or
operating an attachment). You and others
could be seriously injured.
Recommendations for Driving in Hot
Regions
The engine is more likely to overheat in an
environment where the ambient
temperature is high. To prevent the engine
from overheating, pay attention to the
following points:
