Engine Exhaust - Chevrolet 4500 HD 2023 Manual

146 Driving and Operating
Warning (Continued)
Carry a fire extinguisher with the
vehicle at these times.
Avoid driving your vehicle through or
over combustible materials such as
leaves, grass vegetation or stubble
high enough to touch, catch or
collect on its hot exhaust system.
Parking or idling should be done
only in an area where there are no
combustible materials under the
vehicle. Failure to follow these
instructions could damage your
vehicle or nearby property.

Engine Exhaust

Engine Exhaust Emissions Caution (Carbon
Monoxide)
Warning
Do not breathe exhaust gas because it
contains carbon monoxide, which by itself
has no color or odor. Carbon monoxide is
a dangerous gas. It can cause
unconsciousness and can be lethal.
Warning (Continued)
Do not keep the engine running for any
length of time in a place that is poorly
ventilated. It is particularly dangerous to
run the engine in a garage or other
indoor place that could easily fill with
exhaust gases because you could suffer
carbon monoxide poisoning.
Inspect the exhaust pipe from time to
time. If you notice any defect (for
example, a damaged joint, or a hole or
crack caused by corrosion), have checks
and maintenance performed by the
nearest dealer. Continuing to use the
vehicle without having the defect
repaired would be dangerous because
exhaust gases could get into the cab and
cause carbon monoxide poisoning.
If at any time you think exhaust fumes
are entering the cab, have the cause
determined and corrected as soon as
possible. If you must drive under these
conditions, drive only with all windows
fully open. Prevent carbon monoxide
from entering the cab. The best way is to
(Continued)
Warning (Continued)
keep the engine exhaust system, cab and
cab ventilation system properly
maintained.
We recommend that the exhaust system
and cab be inspected by a competent
technician:
Each time the vehicle has an oil
change.
Whenever a change is noticed in the
sound of the exhaust system.
Whenever the exhaust system,
underbody or cab is damaged or
becomes corroded.
To allow proper operation of your
vehicle's ventilation system, keep the air
inlet grille clear of snow, leaves or other
obstructions at all times. Do not park
with the engine running or idle this
vehicle for more than 10 minutes with
the ventilation system control switch in
the OFF position. Even with the
ventilation system on, running the engine
while parked or stopped for longer
periods of time is not recommended.
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