Hummer H1 (2006+). Instruction - page 1


General Information, Lubrication and Maintenance



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

When replacement parts are required, it is strongly recommended that they are purchased through an authorized HUMMER dealer.
It is essential that replacement parts meet or exceed manufacturer’s specifications. Vehicle performance and personal safety may
be impaired if other than original factory components are installed.

The installation of nonapproved accessories or conversions is not recommended as they could affect the vehicle’s driving charac-
teristics and personal safety. AM General LLC will not be liable for personal injury or damage to property resulting from the instal-
lation of nonapproved accessories or conversions to the HUMMER H1.

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 LLC will account for all possibilities.

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

WARNINGS — Indicate potential safety hazards and must be followed to avoid personal injury. Warnings appear as follows:

CAUTIONS — Indicate potential equipment damage, and must be followed to avoid damage to components or systems. An ex-
ample of a caution is shown below:

NOTES — Indicate methods or actions that may simplify vehicle maintenance or help maintain vehicle performance. An example
of a note is shown below:


WARNING: Engine exhaust and a wide variety of automobile components and parts, including components found
interior furnishings in a vehicle, contain or emit chemicals known to the State of California to cause cancer and
birth defects and reproductive harm. In addition, certain fluids contained in vehicles and certain products of compo-
nent wear contain or emit chemicals known to the State of California to cause cancer and birth defects or other re-
productive harm.

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


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

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.


General Information, Lubrication and Maintenance 1-3



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


This service manual contains instructions for maintaining the 2006 commercial HUMMER H1. 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 sys-
tems, 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 maintenance. 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 H1 owners and dealership service personnel can submit service manual suggestions and comments in writing to:

AM General
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
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.


On occasion, an unusual service problem can arise that is not covered in the manual. For this reason, AM General 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-
(in the U.S.) for more information. International and Canadian customers and dealers should call1-315-432-4110.


General Information, Lubrication and Maintenance



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).

The California Air Resources Board (CARB) label (Figure-1-2) is also affixed to the air cleaner housing and certifies that the ve-
hicle conforms to EPA and California emission standards.

Figure 1-1: Emission Control Information Label


General Information, Lubrication and Maintenance 1-5


Figure 1-2: California Air Resources Board Label


The safety certification label is located on the driver side B- pillar (door latch post) (Figures 1-3, and 1-4). The label is required by
the National Highway Traffic Safety Administration and includes a tamper-proof feature. If the label is tampered 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 statement, 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 “VEHI-

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