Hummer H2. Manual - part 2017

MAINTENANCE FOOTNOTES 

Footnotes 

The U.S. Environmental Protection Agency or the California Air Resources Board has determined that 
the failure to perform this maintenance item will not nullify the emission warranty or limit recall liability 
prior to the completion of the vehicle's useful life. We, however, urge that all recommended maintenance 
services be performed at the indicated intervals and the maintenance be recorded. 

#  

Lubricate the front suspension, ball joints, steering linkage, transmission shift linkage and parking brake 
cable guides. Ball joints should not be lubricated unless their temperature is -12°C (10°F) or higher, or 
they could be damaged. 

(a)  

Visually inspect brake lines and hoses for proper hook-up, binding, leaks, cracks, chafing, etc. Inspect 
disc brake pads for wear and rotors for surface condition. Inspect other brake parts, including calipers, 
parking brake, etc. 

(b)  

Visually inspect front and rear suspension and steering system for damaged, loose or missing parts, signs 
of wear or lack of lubrication. Inspect power steering lines and hoses for proper hook-up, binding, leaks, 
cracks, chafing, etc. Visually check constant velocity joints, rubber boots and axle seals for leaks. 

(c)  

Visually inspect hoses and have them replaced if they are cracked, swollen or deteriorated. Inspect all 
pipes, fittings and clamps; replace with genuine GM parts as needed. To help ensure proper operation, a 
pressure test of the cooling system and pressure cap and cleaning the outside of the radiator and air 
conditioning condenser is recommended at least once a year. 

(d)  

ventilation (PCV) valve. An 
Emission Control Service.

or

or

or

X

or

or

Engine cooling system service 
(or every 5 years, whichever 
occurs first). An Emission 
Control Service. Refer to 
footnote (j).

or

or

or

or

or

X

Inspect engine accessory drive 
belt. An Emission Control 
Service.

or

or

or

or

or

X

 

2004 Hummer H2 

2004 GENERAL INFORMATION Maintenance and Lubrication - Hummer H2

  

Visually inspect wiper blades for wear or cracking. Replace blade inserts that appear worn or damaged or 
that streak or miss areas of the windshield. 

(e)  

Make sure the safety belt reminder light and all your belts, buckles, latch plates, retractors and anchorages 
are working properly. Look for any other loose or damaged safety belt system parts. If you see anything 
that might keep a safety belt system from doing its job, have it repaired. Have any torn or frayed safety 
belts replaced. Also look for any opened or broken air bag coverings, and have them repaired or replaced. 
The air bag system does not need regular maintenance. 

(f)  

Lubricate all key lock cylinders, hood latch assembly, secondary latch, pivots, spring anchor, release 
pawl, rear compartment hinges, outer liftgate handle pivot points, rear door detent link, roller mechanism, 
liftgate handle pivot points, latch bolt, fuel door hinge, cargo door hinge, locks and folding seat hardware. 
More frequent lubrication may be required when exposed to a corrosive environment. Applying silicone 
grease on weather-strips with a clean cloth will make them last longer, seal better and not stick or squeak.

(g)  

Add fluid as needed. A fluid loss could indicate a problem; repair as needed. Check vent hose at transfer 
case for kinks and proper installation. 

(h)  

Change automatic transmission fluid and filter if the vehicle is mainly driven under one or more of these 
conditions: 

z

In heavy city traffic where the outside temperature regularly reaches 32°C (90°F) or higher.  

z

In hilly or mountainous terrain.  

z

When doing frequent trailer towing.  

z

Uses such as found in taxi, police or delivery service.  

(i)  

Drain, flush and refill cooling system. Refer to Fluid and Lubricant Recommendations for what to use. 
Inspect hoses. Clean radiator, condenser, pressure cap and filler neck. Pressure test the cooing system and 
pressure cap. 

(j)  

A fluid loss in any vehicle system could indicate a problem. Have the system inspected and repaired and 
the fluid level checked. Add fluid if needed. 

or  

 

2004 Hummer H2 

2004 GENERAL INFORMATION Maintenance and Lubrication - Hummer H2

  

EXPLANATION OF SCHEDULED SERVICES

For time and/or mileage intervals of scheduled maintenance items, refer to Scheduled Maintenance . 

The following text and illustrations describe the details of the required scheduled maintenance services. 

For information on the proper fluids and lubricants, refer to Fluid and Lubricant Recommendations . 

Engine Oil and Filter Change 

For information on the correct engine oil changing procedure, refer to Engine Oil and Oil Filter Replacement 
in Engine Mechanical-6.0L. 

Gas Engine Oil Quality 

Oils of the proper quality for the vehicle can be identified by looking for the STARBURST symbol. The 
STARBURST symbol indicates that the oil has been certified by the American Petroleum Institute (API), and is 
preferred for use in gasoline engines. 

 

2004 Hummer H2 

2004 GENERAL INFORMATION Maintenance and Lubrication - Hummer H2

  

Fig. 1: Engine Oil Viscosity (United States and Canada)

 

2004 Hummer H2 

2004 GENERAL INFORMATION Maintenance and Lubrication - Hummer H2