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which allows the driver to switch from the main
tank (when empty) to the auxiliary tank.
The gasoline fuel filler compartment is lo-
cated on the left side of the vehicle, directly
under the driver's window.
GAS CAP-The cap is equipped with a double
set of locking tangs .
To Remove
Rotate cap one-half turn counterclockwise to
clear the first set of tangs from the slots
inside the filler neck . This will allow any
residual pressure to escape.
Pull the cap outward and rotate one-quarter
turn counterclockwise to clear second set of
tangs. Then remove the cap .
To install, reverse this procedure .
NOTE: If the gas cap requires a replacement,
only a cap with the same features should be
used. Failure to use the correct cap can result
in a serious malfunction of the fuel system . Cor-
rect replacement caps may be obtained from
your GMC Motorhome dealer .
IMPORTANT : If automatic gasoline pump noz-
zle shuts off before both fuel tanks are full, it
is recommended that a delay of approximately
one minute be held prior to continuation of
filling tanks. Automatic nozzle should then be
adjusted for a slower fuel feed, to fill remainder
of tanks.
CARBURETOR
To obtain maximum engine performance and
fuel economy, carburetor idle speeds should be
checked as recommended in the Maintenance
Schedule folder . If the engine stalls, idles too
fast or slow, or idles roughly, the following ad-
justments should be performed . However, if the
above symptoms persist it is recommended the
vehicle be taken to a GMC Motorhome dealer .
NOTE: Refer to Tune-up label on engine for
correct specifications.
8 5
Fuel Filter
To replace carburetor filter, disconnect fuel
line, remove filter nut, gasket, filter, and spring .
Install spring and element (open end of filter
facing toward filter nut) . Install gasket ; tighten
nut to 18 foot-pounds torque .
IMPORTANT: Tightening fuel inlet nut
beyond specified torque can damage
nylon gasket .
ENGINE AIR CLEANER
The air cleaner is a disposable type element .
Replace the element as specified in the Mainte-
nance Schedule folder. Do not wash, oil, or clean
with air hose . The air cleaner will require more
frequent service under dusty conditions . Your
GMC Motorhome dealer can advise you on the
proper interval . When replacement is necessary,
an AC ACron air filter element is recommended .
NOTICE
DO NOT remove the engine air cleaner
unless temporary removal is necessary
during repair or maintenance of the ve-
hicle . When the air cleaner is removed
backfiring can cause fire in the engine
compartment .
BATTERIES
CHASSIS ELECTRICAL SYSTEM
There are two Delco Batteries used in the
chassis and living area of the Motorhome . The
main battery (or automotive battery) is located
behind the right front access door . The auxiliary
battery (living area battery) is located in the
storage or motor generator compartment .
Removing Safety Access Cover
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