GMC 4000 Series Service Manual page 4

This manual contains on-the-vehicle maintenance, light repair information,
and unit replacement on all truck series listed on page v. Overhaul proce­
dures for major units will be published in separate "Unit Overhaul" manuals.
Important information on the arrangement and use of this manual will be
found on page iv. Operation of the vehicles from the standpoint of the driver is
contained in a separate Owner's and Driver's manual which is furnished with
every new GMC Truck.
Every effort has been made to include tim ely and adequate information on
the various units and systems used on GMC Trucks. The general maintenance
and light repair procedures in the various manual sections are the result of
extensive service experience. This information should serve not only as a ref­
erence for the experienced mechanical force, but also as a comprehensive text
for training purposes.
In some cases, considerable space is devoted to describing the operation
of a unit or system. The use of this space is justified by the presumption
that in order for a mechanic to maintain a unit or system in a serviceable
condition, he must first understand how the unit or system should function.
A ll information contained in this manual is based on the latest product
information available at the time of publication approval. GMC Truck and
Coach Division reserves the right to make changes in design or add improve­
ments at any time without incurring any obligation to install same on vehicles
previously purchased.
CHASSIS TYPE
SYMBOL
(E) Conv. Cab (92" BBC)
(P ) Forward Control
(T) Tilt Cab
(S ) Schoolbus Cowl
ENGINE TYPE
SYMBOL
(G ) V6 Toro-Flow (Diesel)
(M) V6 Gasoline
(S ) In-Line Gasoline
INTRODUCTION
TRUCK MODEL DESIGNATION
("L" SERIES 4000)
(L ) Tilt Cab (V ) Hydraulic Brakes
(ALL OTHER SERIES)
GVW RANGE NUMBER
See "Load Capacity Chart"
in Owner's and Driver's
Manual.
E M 40 V - D 020001
(A ) Air Brakes
BODY AND BRAKE TYPE
P — Chassis Only (Hyd. Brakes)
V —Cab & Chassis (Hyd. Brakes)
A — Cab & Chassis (Air Brakes)
M— Cowl & Chassis (Hyd. Brakes)
Y — Cowl & Chassis (Air Brakes)
iii
MODEL YEAR
SERIAL NUMBER