GMC MOTORHOME 1978 User Manual

NOTICE : Refer to Tune-up label on engine
for correct specifications .
SPARK PLUGS
The frequency of spark plug service intervals
is explained in the Maintenance
Schedule folder
.
Servicing
is the
owner's
responsibility . Before
removing plugs, clean plug wells thoroughly,
clean the threads and seats in the cylinder heads
to assure proper seating and
heat transfer .
HEADLIGHTS
Make -a headlight beam adjustmentcheck a
regular part
of your "Safety Maintenance" pro-
gram . Sealed-Beam units are No . 6014 which
are equipped with ground guide points for the
use of a mechanical aiming device . Your author-
ized dealer is best qualified to adjust your head-
lights .
Headlight Beam Adjustment
NOTICE : Cutouts in headlight bezel permit ac-
cess to adjustment screws .
Headlights should
be
adjusted
properly . The
top adjusting screw
provides vertical adjustment
and the side adjusting
screw provides horizontal
Chassis
Fuse Block
103
adjustment . Headlights should not have
to be
adjusted after replacing Sealed-Beam unit,
pro-
viding headlights
were in proper
adjustment
before replacement and adjusting
screws were
not disturbed during replacement
.
Headlight Replacement
To replace a
Sealed-Beam unit, remove bezel .
Then disengage the
tension spring using a stiff
hooked tool . Rotate
the Sealed-Beam assembly
slightly to disengage
mounting ring slots from
groove of each adjusting screw,
then pull for-
Headlight
Replacement
INSTRUMENT LAMPS (SFE-4)
WARNING TELL-TALE
LIGHTS (SFE-5)
SIDE MARKER LIGHTS, I .D . d
CLEARANCE LIGHTS, TAIL
LIGHTS, DOME LIGHTS,
LICENSELIGHTS, VISOR
VANITY MIRROR IF SO
EOUIP PED
(SF
E-20 - -
CIGAR-CIGARETTE LIGHTER (SFE-20)
HAZARD WARNING LIGHTS,
STOP LIGHTS (SFE-20)
AUXILIARY BATTERY
SWITCH (AGC-5)
RADIO, TAPE PLAYER
(AGC-10)
AIR SUSPENSION
CONTROLS
30A CIRCUIT BREAKER
® .
P0
ri
6s~t ,
W I M
HEATER AND AIR CONDITIONER
CONTROLS (AGC-25)
WINDSHIELD WASHER (AGC-10)
TURN SIGNAL LIGHTS (SFE-20)
CRUISE CONTROL, BACK-UP
LIGHTS (SFE-20)
TRANSMISSION CONTROL, PARKING
BRAKE LIGHT, GAUGES (AGC-10)
RADIO WAGES TRANS

GMC MOTORHOME 1978 Specifications

General

Brand	GMC
Model	MOTORHOME 1978
Category	Motorhomes
Language	English