Index Hummer Hummer H1 - service repair manual 2002 year

Hummer H1 (2002+). Manual - part 1

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05745159

Section 1
General Information, Lubrication and Maintenance

TABLE OF CONTENTS

SAFETY SUMMARY

Individuals who decide to perform their own repairs should
have proper training and limit repairs to components which
will not affect the safety of the vehicle or its occupants.

When replacement parts are required, it is strongly recom-
mended that they are purchased through an authorized HUM-
MER dealer. It is essential that replacement parts meet or
exceed manufacturerÕs specifications. Vehicle performance
and personal safety may be impaired if other than original fac-
tory components are installed.

The installation of nonapproved accessories or conversions is
not recommended as they could affect the vehicleÕs driving
characteristics and personal safety. AM General Corporation
will not be liable for personal injury or damage to property re-
sulting from the installation of nonapproved accessories or
conversions to the HUMMER.

Following the safety precautions as prescribed throughout this
manual may greatly reduce the risks of personal injury and
damage to the vehicle. However, it is unlikely that AM General
Corporation will account for all possibilities.

Warnings, cautions, and notes are used throughout this service
manual to assist service personnel in the performance of main-
tenance actions. These statements are designed as reminders
for trained and experienced service personnel.

WARNINGS

Ñ Indicate potential safety hazards and must be

followed to avoid personal injury. Warnings appear as follows:

CAUTIONS

Ñ Indicate potential equipment damage, and

must be followed to avoid damage to components or systems.
An example of a caution is shown below:

NOTES

Ñ Indicate methods or actions that may simplify ve-

hicle maintenance or help maintain vehicle performance. An
example of a note is shown below:

WARNING: To avoid injury, do not remove surge
tank filler cap before depressurizing cooling system
when engine temperature is above 190° F (88° C).

CAUTION: To avoid starter damage, do not operate
starter continuously for more than 15 seconds. Wait 10
to 15 seconds between periods of operation.

NOTE: Clean all components, examine for wear or dam-
age, and replace if necessary.

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CARBON MONOXIDE

WARNING: Carbon monoxide (exhaust gases) can be
fatal.

WARNING: Brain damage or death can result from
heavy exposure to carbon monoxide. The following pre-
cautions must be followed to ensure personal safety.

1. Do not operate vehicle engine in enclosed areas. Do not

idle the vehicle engine with vehicle windows closed. Be
alert at all times for exhaust odors. Be alert for exhaust
poisoning symptoms. They are:

¥ Headache

¥ Dizziness

¥ Sleepiness

¥ Loss of muscular control

2. If you see another person with exhaust poisoning

symptoms:

¥ Remove person from area

¥ Expose to open air

¥ Keep person warm

¥ Do not permit physical exercise

¥ Administer artificial respiration, if necessary

¥ Notify medical personnel

The best defense against exhaust poisoning is adequate ventila-
tion.

ABOUT THIS MANUAL

This service manual contains instructions for maintaining the
commercial HUMMER. Spend some time looking through this
manual. Features to improve the usefulness of this manual and
increase your efficiency are:

Accessing Information

- These include: tabulated sections for

quick reference, extensive troubleshooting guides for specific
systems, and step-by-step directions for service repairs.

Illustrations

- A variety of methods are used to make locating

and repairing components easy. Locator illustrations, exploded
views, and cut-away diagrams make the information in this
manual easy to understand.

The service manual is the best source available for providing
information and data critical to vehicle operation and mainte-
nance. In this manual you will find the following information:

¥ Safety Summary

¥ General Information

¥ General Service Procedures

¥ Detailed Service Procedures

¥ Torque Ranges

¥ Wiring Diagrams and Schematics

HUMMER owners and dealership service personnel can sub-
mit service manual suggestions and comments in writing to:

AM General Corporation
Commercial Publications Department
408 S. Byrkit St.
P.O. Box 728
Mishawaka, IN 46546-0728

Forms are furnished at the end of this manual.

Service Manual Revisions

In order to receive future revisions to this service manual,
please write to:

AM General Corporation
Service Parts Logistics Operations
Commercial Publications/Customer Service
408 South Byrkit Avenue
P.O. Box 728
Mishawaka, Indiana 46546-0728

Be sure to specify publication number.

HUMMER SERVICE HOTLINE

On occasion, an unusual service problem can arise that is not
covered in the manual. For this reason, AM General Corpora-
tion has established a service hotline for dealership assistance.
The hotline number is:

1-800-638-8303

Transfer Case Hotline

If you have questions that are not answered in Section 5 of this
Service Manual, you can call the Transfer Case Hotline at

1-800-945-4327

(in the U.S.) for more information. Interna-

tional and Canadian customers and dealers should call

1-315-432-4110

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05745159

EMISSION CONTROL INFORMATION LABEL

The vehicle emission control label contains engine information
such as curb idle rpm, engine displacement, catalytic converter
type, fuel rate, and vacuum hose routing.

This label is affixed to the air cleaner housing (Figure 1-1).

Figure 1-1: Emission Control Information Label Information

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General Information, Lubrication and Maintenance

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SAFETY CERTIFICATION LABEL

The safety certification label is located on the driver side B-
pillar (door latch post) (Figures 1-2, 1-3, and 1-4). The label is
required by the National Highway Traffic Safety Administra-
tion and includes a tamper-proof feature. If the label is tam-
pered with, a void pattern will appear across the label.

The label contains the name of the manufacturer, the month
and year the vehicle was manufactured, the certification state-
ment, the vehicle identification number (VIN), and the vehicle
model type. It also contains the Gross Vehicle Weight Rating
(GVWR), Gross Axle Weight Ratings (GAWR), and wheel
and tire information. For more information on the GVWR and
GAWR, refer to ÒVEHICLE LOADING INFORMATIONÓ in
the Hummer OwnerÕs Manual.

Figure 1-2: Safety Certification Label

for Fleet Vehicles (12,100 lb. GVW vehicles)

Figure 1-3: Safety Certification Label for

10,300 lb GVWR Vehicles

Figure 1-4: Safety Certification Label for

10,800 lb GVWR Vehicles

TRANSMISSION IDENTIFICATION

The 4L80-E automatic transmission serial number is located on
a plate at the right side of the transmission (Figure 1-5).

Figure 1-5: Transmission I.D. Plate Location

TRANSMISSION

I.D. PLATE

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