Hummer H2. Manual — part 2019

Fig. 5: Lubrication Fittings-Ball Joints
Courtesy of GENERAL MOTORS CORP.

Callouts For Fig. 5

Lubricate the steering linkage, the upper ball joint, and the lower ball joint.

Tire and Wheel Inspection and Rotation

Inspect the tires for abnormal wear or damage. Rotate the tires in order to equalize the wear and obtain
maximum tire life. Refer to Tire Rotation in Tires and Wheels. If irregular or premature wear exists, refer to
Tire Diagnosis - Irregular or Premature Wear or to Tire Diagnosis - Waddle Complaint in Tires and
Wheels.

Callout

Component Name

1

Lubrication Fittings

2004 Hummer H2

2004 GENERAL INFORMATION Maintenance and Lubrication - Hummer H2

Accessory Drive Belt Inspection

Inspect the accessory drive belts for the following conditions:

z

Cracks

z

Fraying

z

Wear

z

Proper tension

Replace the accessory drive belt as needed. Belts can have many small cracks in individual ribs without
affecting the performance. Refer to Drive Belt Replacement - Accessory or to Drive Belt Replacement - Air
Conditioning in Engine Mechanical- 6.0L.

Automatic Transmission

Change the fluid and the filter according to the maintenance schedule intervals. Refer to Automatic
Transmission Fluid/Filter Replacement in Automatic Transmission-4L60-E.

Automatic Transfer Case

Change the transfer case fluid. Refer to Transfer Case Fluid Replacement in Transfer Case BW 4484.

Spark Plug Wire Inspection

Clean the spark plug wires. Inspect the spark plug wires for burns, cracks or other damage. Inspect the wire boot
fit at the coils and at the spark plugs. Replace the wires as needed. Refer to Spark Plug Wire Replacement in
Engine Controls- 6.0L.

Spark Plug Replacement

Replace the spark plugs according to the maintenance schedule intervals with the correct type. Refer to Spark
Plug Replacement in Engine Controls-6.0L.

For information on the correct type of spark plug, refer to Maintenance Items .

Fuel Filter Replacement

Replace the fuel filter according to the maintenance schedule intervals with the correct type.

For correct procedure refer to Fuel Tank Replacement in Engine Controls-6.0L.

Drive Axle Service

Change the axle fluid according to the maintenance schedule intervals.

For axle capacities refer to Capacities - Approximate Fluid .

2004 Hummer H2

2004 GENERAL INFORMATION Maintenance and Lubrication - Hummer H2

For the procedure to check the fluid level of the front drive axle refer to Lubricant Level Inspection - Front
Drive Axle in Front Drive Axle.

For the procedure to check the fluid level of the front drive axle refer to Lubricant Level Inspection - Rear
Drive Axle in Rear Drive Axle.

Cooling System Service

Drain, flush and refill the cooling system with new coolant. Refer to Draining and Filling Cooling System in
Engine Cooling.

GM OIL LIFE SYSTEM - RESETTING

The vehicle has a computer system that has a change engine oil light, indicating when to change the engine oil
and filter. This is based on engine revolutions and engine temperature, and not on mileage. Based on driving
conditions, the mileage at which an oil change will be indicated can vary considerably. For the oil life system to
work properly, the system must be reset every time the oil is changed.

When the system has calculated that oil life has been diminished, it will indicate that an oil change is necessary.
The change engine oil light will come on. The oil must be changed as soon as possible. It is possible that, if the
vehicle is driven under the best conditions, the oil life system may not indicate that an oil change is necessary
for over a year. However, the engine oil and filter must be changed at least once a year and at this time the
system must be reset. If the system is ever reset accidentally, the oil must be changed at 3,000 miles (5 000 km)
since the last oil change. Remember to reset the oil life system whenever the oil and filter is changed.

Resetting Procedure

1. Press the fuel information button until Engine Oil Life appears on the screen.

2. Press and hold the select button for five seconds.

3. OIL LIFE RESET will appear on the screen for 10 seconds.

4. The oil life system is reset.

OWNER CHECKS AND SERVICES

These owner checks and services should be performed at the intervals specified to help ensure the safety,
dependability and emission control performance of your vehicle. Your GM Goodwrench dealer can assist you
with these checks and services.

Be sure any necessary repairs are completed at once. Whenever any fluids or lubricants are added to your
vehicle, make sure they are the proper ones, refer to Fluid and Lubricant Recommendations .

At Each Fuel Fill

It is important to perform these underhood procedures at each fuel fill.

Engine Oil Level

2004 Hummer H2

2004 GENERAL INFORMATION Maintenance and Lubrication - Hummer H2

Inspect the engine oil level and add the proper oil if necessary. In order to select the proper fluids and
lubricants, refer to Fluid and Lubricant Recommendations .

Engine Coolant Level

Check the engine coolant levels and add DEX-COOL(R) coolant mixture if necessary. Refer to Fluid and
Lubricant Recommendations .

Windshield Washer Fluid Level

Check the windshield washer fluid level in the windshield washer tank and add the proper fluid if necessary.
Refer to Fluid and Lubricant Recommendations .

At Least Once a Month

Tire Inflation

Check tire inflation. Make sure the tires are inflated to the pressures specified on the Certification/Tire label
located on the driver door lock pillar. Refer to Label - Vehicle Certification (w/o RPO Z49) or Label -
Vehicle Certification (w/RPO Z49) .

At Least Once a Year

Starter Switch Check

z

Before you start, ensure that you have enough room around the vehicle in case the vehicle jumps
suddenly.

z

Firmly apply both the park brake and the regular brake.

z

On automatic transmission vehicles, try to start the engine in each gear. The starter should work only in
PARK (P) or NEUTRAL (N). If the starter works in any other position, the vehicle needs service.

On manual transmission vehicles, put the shift lever in NEUTRAL (N), push the clutch down halfway and try to
start the engine. The starter should work only when the clutch is pushed down all the way to the floor. If the
starter works when the clutch is not pushed all the way down, the vehicle needs service.

Automatic Transmission Shift Lock Control Check

NOTE:

It is important to check your oil regularly and keep it at the proper level. Failure
to keep your engine oil at the proper level can cause damage to your engine not
covered by your warranty.
or

IMPORTANT: Do not use the accelerator pedal, and be ready to turn off the engine

immediately if it starts.

2004 Hummer H2

2004 GENERAL INFORMATION Maintenance and Lubrication - Hummer H2