1991 GMC LIGHT DUTY TRUCK Service Manual – PDF DOWNLOAD

Description

1991 GMC LIGHT DUTY TRUCK Service Manual – PDF DOWNLOAD

DESCRIPTION:

1991 GMC LIGHT DUTY TRUCK Service Manual – PDF DOWNLOAD

FOREWORD

• This service manual contains diagnosis, “On-Vehicle” maintenance, and light repair for Light Duty Truck Models (“R/V, and P”). Fuel and emissions related components for throttle body injection are covered in a separate Fuel and Emissions manual. Procedures involving disassembly and assembly of major components for these vehicles are published in a separate “
• Truck Unit Repair Manual.” Wiring diagrams and electrical diagnosis for these models are also published in a separate “Electrical Diagrams and Diagnosis” manual. This manual should be kept in a handy place for ready reference. If properly used, it will meet the needs of technicians and vehicle owners.

CAUTION

• These vehicles contain some parts dimensioned in the metric system as well as in the customary system. Some fasteners are metric and are very close in dimension to familiar customary fasteners in the inch system. It is important to note that, during any vehicle maintenance procedures, replacement fasteners must have the same measurements and strength as those removed, whether metric or customary.’
• (Numbers on the heads of metric bolts and on surfaces of metric nuts indicate their strength. Customary bolts use radial lines for this purpose, while most customary nuts do not have strength markings.) Mismatched or incorrect fasteners can result in vehicle damage or malfunction, or possibly personal injury. Therefore, fasteners removed from the vehicle should be saved for re-use in the same location whenever possible.
• Where the fasteners are not satisfactory for re-use, care should be taken to select a replacement that matches the original. For information and assistance, see your authorized dealer.

CAUTION

• To reduce the chance of personal injury and/or property damage, the following instructions must be carefully observed. Proper service and repair are important to the safety of the service technician and the safe, reliable operation of all motor vehicles. If part replacement is necessary, the part must be replaced with one of the same part number or with an equivalent part. Do not use a replacement part of lesser quality. The service procedures recommended and described in this service manual are effective methods of performing service and repair.
• Some of these procedures require the use of tools specially designed fo r the purpose. Accordingly, anyone who intends to use a replacement part, service procedure or tool, which is not recommended by the vehicle manufacturer, must first determine that neither his safety nor the safe operation of the vehicle will be jeopardized by the replacement part, service procedure or tool selected.
• It is important to note that this manual contains various Cautions and Notices that must be carefully observed in order to reduce the risk of personal injury during service or repair, or the possibility that improper service or repair may damage the vehicle or render it unsafe. It is also important to understand that these ‘Cautions’ and ‘Notices’ are not exhaustive, because it is impossible to warn of all the possible hazardous consequences that might result from failure to follow these instructions.

TABLE OF CONTENTS:

1991 GMC LIGHT DUTY TRUCK Service Manual – PDF DOWNLOAD

SU B JEC T PAGE
General Information…………………………………………………………………………………………………………………………………..OA- 2
Service Parts Identification Label………………………………………………………………………………………………………….OA- 2
Vehicle Identification Number………………………………………………………………………………………………………………. OA- 2
Certification Label…………………………………………………………………………………………………………………………………..OA- 3
Model Reference…………………………………………………………………………………………………………………………………….OA- 4
Preparing Your Truck For Storage………………………………………………………………………………………………………..OA- 5
Storage Location…………………………………………………………………………………………………………………………………….OA- 5
Short Term Storage – Up To Thirty Days……………………………………………………………………………………………OA- 5
Long Term Storage — Thirty Days or More…………………………………………………………………………………………OA- 6
Reactivating the Vehicle After Long Storage……………………………………………………………………………………….OA- 6
Engine Identification Number…………………………………………………………………………………………………………………OA- 6
Transmission Identification Number……………………………………………………………………………………………………..OA- 6
Vehicle Lifting Procedures…………………………………………………………………………………………………………………….0A-10
Metric Fasteners…………………………………………………………………………………………………………………………………….0A-10
Fastener Strength Identification……………………………………………………………………………………………………………OA-17
Prevailing Torque Fasteners………………………………………………………………………………………………………………….OA-17
Standard Torque Specifications And Fasteners Markings………………………………………………………………….OA-18
Six Lobed Socket Head Fasteners………………………………………………………………………………………………………..OA-19
Anticorrosion Treatment………………………………………………………………………………………………………………………..OA-19
Electrostatic Discharge………………………………………………………………………………………………………………………….OA-19
Graphic Symbols……………………………………………………………………………………………………………………………………OA-19
RPO Listing (Regular Production Option)………………………………………………………………………………………………. OA-23
Regular Production Options (RPO)-Tires……………………………………………………………………………………………OA-26
Common Automotive Abbreviations……………………………………………………………………………………………………..OA-27
Lock Cylinder Coding………………………………………………………………………………………………………………………………..OA-29
Need help? Contact: [email protected]

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PLEASE NOTE:

PLEASE NOTE:

• This is the SAME manual used by the dealers to troubleshoot any faults in your vehicle. This can be yours in 2 minutes after the payment is made.
• Contact us at [email protected] should you have any queries before your purchase or that you need any other service / repair / parts operators manual.

S.M