FULL-SHE
1988-9£ r^PAIR MANUAL
Covers all U.S. and Canadian models of
Chevrolet/GMC Pick-ups, Sierra, Blazer, Tahoe,
Yukon and Suburban; 2 and 4 wheel drive
gasoline and diesel engines
ABODE
FGHI
by Thomas A Mellon, A.S.E., SAE.
Automotive
Books
PUBLISHED BY HAYNES NORTH AMERICA. Inc.
AimDMCTIVIr
S)
ASSOCIATION
Manufactured in USA
© 1996 Haynes North America, Inc.
ISBN 0-8019-9102-1
Library of Congress Catalog Card No. 98-74837
5678901234 9876543210
Haynes Publishing Group
Sparkford Nr Yeovil
Somerset BA22 7JJ England
Haynes North America, Inc
861 Lawrence Drive
Newbury Park
California 91320 USA
3N3
Chilton is a registered trademark of W.G. Nichols, Inc., and has been licensed to Haynes North America, Inc.
Contents
GENERAL INFORMATION
AND MAINTENANCE
1-2
HOW TO USE THIS BOOK
1-2
TOOLS AND EQUIPMENT
1-4
SERVICING YOUR VEHICLE
SAFELY
1 -5
FASTENERS,
MEASUREMENTS AND
CONVERSIONS
1-7
SERIAL NUMBER
IDENTIFICATION
1-10
ROUTINE MAINTENANCE
AND TUNE-UP
1-35
FLUIDS AND LUBRICANTS
1-46
TRAILER TOWING
1-47
JUMP STARTING A DEAD
BATTERY
1-48
JACKING
1 -50 MAINTENANCE INTERVALS
ENGINE ELECTRICAL
2-2
2-2
2-6
HIGH ENERGY IGNITION
(HEI) SYSTEM
2-7
2-8
DISTRIBUTOR IGNITION (Dl) o Q
SYSTEM
FIRING ORDERS
CHARGING SYSTEM
STARTING SYSTEM
SENDING UNITS AND
SENSORS
ENGINE AND ENGINE
OVERHAUL
3-2
ENGINE MECHANICAL
3-56
EXHAUST SYSTEM
3-58
ENGINE RECONDITIONING
4-2
GASLINE ENGINE EMISSION 4-25
DIESEL ELECTRONIC
DRIVEABILITY
AND EMISSION CONTROLS
CONTROLS
4-10
DIESEL ENGINE EMISSION
CONTROLS
4-11 CARBURETED ELECTRONIC
ENGINE CONTROLS
4-17 FUEL INJECTED ELECTRONIC
ENGINE CONTROLS
ENGINE CONTROLS
4-29
TROUBLE CODES
4-39
COMPONENT LOCATIONS
4-55
VACUUM DIAGRAMS
FUEL SYSTEM
5-2
BASIC FUEL SYSTEM
DIAGNOSIS
5-2
FUEL LINE FITTINGS
5-3
CARBURETED FUEL SYSTEM
5-10
THROTTLE BODY INJEC-
TION (TBI)
5-14 MULTI-PORT FUEL
INJECTION (MFI)
5-19
CENTRAL SEQUENTIAL FUEL
INJECTION (CSFI)
5-22
DIESEL FUEL SYSTEM
5-26
FUEL TANK
CHASSIS ELECTRICAL
6-2
UNDERSTANDING AND
TROUBLESHOOTING
ELECTRICAL SYSTEMS
6-7
BATTERY CABLES
6-7
SUPPLEM