Engine Exhaust Gas Caution - GMC 1975 Motorhome Operating Manual

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STA
CLE
ENGINE EXHAUST GAS CAUTION
(CARBON MONOXIDE)
Avoid inhaling exhaust gases because they contain carbon monoxide
which by itself is colorless and odorless . Carbon monoxide is a dangerous
gas that can cause unconsciousness and is potentially lethal .
If, at any time, you suspect that exhaust fumes are entering the Motor-
Home from any source have the cause determined and corrected as soon
as possible . If you must drive before the cause is corrected, drive only with
ALL except two rear windows FULLY open and heating or cooling system
adjusted for maximum ventilation (see below) .
The best protection against carbon monoxide entry into the vehicle body
is a properly maintained engine exhaust system, body and body ventilation
system . It is recommended that the exhaust system and body be inspected
by a competent mechanic:
Each time the vehicle is raised for lubrication or oil change.
" Whenever a change is noticed in the sound, alignment,
or
appearance of
the exhaust system .
Whenever the exhaust system, underbody or rear of the vehicle is
damaged.
See your Maintenance Schedule folder for inspection procedure.
To allow proper operation of the vehicle's ventilation system, keep front
inlet grille clear of snow, leaves, or other obstructions at all times.
OCCUPYING A PARKED VEHICLE WITH ENGINE RUNNING FOR AN EX-
TENDED PERIOD OF TIME IS NOT RECOMMENDED.
Do not run engine in confined areas such as garages any more than
needed to move vehicle in or out of area. When vehicle is stopped in an
UNCONFINED area with the engine running for any more than a short
period of time, adjust heating or cooling system to force outside air into
the vehicle as follows:
1 . On vehicles not equipped with automotive air conditioning, set fan to
medium or high speed and upper control lever to any position except "OFF."
Lower control lever should be adjusted to any position except extreme left
"RECIRC."
2. On vehicles equipped with automotive air conditioning, set fan to
medium or high speed, upper control lever to any position except "OFF,"
and lower control lever to any position except extreme left "RECIRC."
The two rear windows should be closed while driving to avoid drawing
dangerous exhaust gases into the vehicle through those openings . In addi-
tion, it is recommended that roof vent(s) be closed while driving. If, for
some reason, a rear window or roof vent must remain open for a period
while driving, or electrical wiring or other cable connections to a trailer
must pass through the seal between them and the body, the following
precautions should be observed .
Close all windows.
" Adjust heating or cooling system to force outside air into the vehicle as
described in Step 1 or 2 above but with fan set at high speed .
" Air vents in the instrument panel should be fully open .
It is important that the inside engine cover be properly seated to prevent
possible leakage of exhaust fumes into the vehicle through this opening.
See "LIVING AREA FACILITIES CAUTION (CARBON MONOXIDE)" on
page 29.

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