GMC MOTORHOME 1978 User Manual

MOBILE RADIO SYSTEMS
Mobile two-way units are subject to Federal
Communications Commission (FCC) rules and
must be installed by trained radio people .
Mobile telephones installed by your local phone
company,
Citizens
Band(CB) radios, and ga-
rage door opener will not affect vehicle opera-
tion . If any other mobile radio
transmitters are
installed, there can be possible adverse effects
on
vehicle operation .
CONTROL PANEL
ELECTRO-LEVEL SYSTEM
Early model 1978 vehicles are equippedwith
Type I rear air suspension . Later model vehicles
are
equipped
with
Type II rear air suspension .
Both ELECTRO-LEVEL suspension systems
operate in the same manner, using an automatic
leveling feature to maintain a constant ride
height at the rear tandem suspension when the
vehicle is travelling down the highway .
In addition, the Electro-Level system pro-
vides the ability to level
the vehicle when
stopped at a campsite or parking area where
the ground surface is not level . With Electro-
Level, the rear of the vehicle can be raised or
lowered approximately 4 inches
from normal
ride height . This is
accomplished by pushing a
rocker switch
(or switches) on the Electro-
Level control panel, which is located to the left
of the driver, below the window .
The driver controls consist of three rocker
switches on the Electro-Level control panel .
Electro-Level System Control Panel
3 0
These switches function to automatically or
manually level the vehicle . The center rocker
switch (TRAVEL) is used for a travel or hold
mode, and the two outer rocker switches
(RAISE-LOWER) are used to raise or lower
the rear of the vehicle .
NORMAL OPERATION
Highway Travel
When driving down the highway, the normal
position
for
both
the RAISE-LOWER switches
is "OFF ." The center
TRAVEL switch should
be in the "HOLD" position
. This allows the
vehicle to maintain a designed
ride height, and
eliminates unnecessary operation of
the air
compressor(s) .
NOTICE : If the Motorhome has been in a raised
or lowered position while parkedon an uneven
surface, the TRAVEL switch should be moved
to "AUTO"
for the first five minutes before the
vehicle is put into
motion . This will allow the
vehicle to level itself for
highway driving . Then
move the switch to "HOLD" after normal ride
height is achieved . A reminder light in the dash
panel (which says "SET LEVEL TO TRAVEL
AUTO") is designed to light any
time the en-
gine is running and the
transmission shift lever
is moved to "D ."
Campsite or Parking Area
The two RAISE-LOWER switches
may be
used as necessary to raise or lower the rear of
the vehicle . When
using Electro Level at a
campsite the vehicle engine need
not
be
running

GMC MOTORHOME 1978 Specifications

General

Brand	GMC
Model	MOTORHOME 1978
Category	Motorhomes
Language	English