GMC 1990 Light Truck Repair Manual page 5

1990
UNIT REPAIR
MANUAL
COVERING
LIGHT DUTY
TRUCKS
The Table of Contents on this page indicates the
sections covered in this manual. At the beginning of
each individual section is a Table of Contents which
gives the page number on which each major subject
begins.
When reference is made in this manual to a brand
name, number, or specific tool, an equivalent product
may be used in place of the recommended item.
All information, illustrations, and specifications con­
tained in this Manual are based on the latest product
information available at the time of publication approv­
al. The right is reserved to make changes at any time
without notice.
X-9037
©1989 General Motors Corporation
Printed in USA
February, 1989
All rights reserved.
TABLE OF CONTENTS
SEC. SECTION NAME
OA GENERAL INFORMATION
1 AIR CONDITIONING
1B1 A6 Air Conditioning Compressor
1B2 V5 Air Conditioning Compressor
1B3 R-4 Air Conditioning Compressor
1B4 HR-6 Air Conditioning Compressor
1B5 SD-709 Air Conditioning Compressor
3 STEERING
3B2 Manual Steering Gear
3B3 Power Steering
4
AXLES
4B Rear Axle
4B1 7 1/2-Inch Ring Gear
4B2 8 1/2-Inch Ring Gear
4B3 9 1/2-Inch Ring Gear
4B4 10 1/2-Inch Ring Gear
4B5 Dana Rear Axles
4B6 12-Inch Ring Gear (Rockwell)
4B7 Locking Differentials
4C Front Axle
4C1 8 1/2-Inch Ring Gear
4C2 9 3/4-Inch Ring Gear (Dana)
4C3 T Truck Front Axle
4C4 K Truck Front Axle 8 1/4 and 9 1/4-Inch
Ring Gear
4C5 L Van Front Axle
5 BRAKES
6 ENGINE
6A General Engine
6A1 2.5 Liter L4
6A2 2.8 Liter V6
6A3 4.3 Liter V6
6A4 4.8 Liter L6
6A5 V8 Engine
6A7 6.2 Liter Diesel
6C Carburetor and TBI Unit
6C1 Model 1MEF Carburetor
6C2 Model M4MEF Carburetor
6C3 TBI Unit Model 220
6C4 TBI Unit Model 700
6D Engine Electrical
6D1 SI Series Generators
6D2 CS-144 Generator
6D3 SD Starting Motors
6D4 PG-200 (PMGR) Starting Motor
6D5 Distributors
7 TRANSMISSION
7A Automatic Transmission
4L60 Hydra-matic 4L60 (700-R4)
3L80 Hydra-matic 3L80/3L80-HD (400/475)
3L30 Hydra-matic 3L30 (180C)
7B Manual Transmission
7B1 Hydra-Matic 5LM60 (HM-290)
7B2 HM-117
7B3 New Process Transmission
7B4 Borg Warner Transmissions
7D Transfer Case
7D1 New Process 205 Transfer Case
7D2 New Process 241 Transfer Case
7D3 New Process 231 Transfer Case
7D4 Borg Warner 1370 Transfer Case
7D5 Borg Warner 4472 Transfer Case