Hummer H1 (2006+). Manual - part 19

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General Information, Lubrication and Maintenance

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❐ 

Clean or replace air filter. 

❐ 

Replace fuel filter element.

❐ 

Change geared hub oil. 

❐ 

Change axle oil.

❐ 

Change transmission and transfer case fluid.

❐ 

Change transmission filter.

❐ 

Check items in Maintenance Groups A, B, and C.

18,000 Miles (29,000 km) –  600 hrs normal use or 300 hrs severe operation

❐ 

Change engine oil and replace filter.

❐ 

Check items in Maintenance Groups A and B.

24,000 Miles (38,600 km) – 800 hrs normal use or 400 hrs severe operation

❐ 

Change engine oil and replace filter.

❐ 

Clean or replace air filter. 

❐ 

Replace fuel filter element.

❐ 

Change transmission and transfer case fluid.

❐ 

Change transmission filter.

❐ 

Check items in Maintenance Groups A, B, and C.

❐ 

Change geared hub oil. 

❐ 

Change axle oil.

❐ 

Inspect brake fluid for moisture contamination.

30,000 Miles (48,300 km) – 1,000 hrs normal use or 500 hrs severe operation

❐ 

Change engine oil and replace filter.

❐

 Check items in Maintenance Groups A and B.

36,000 Miles (58,000 km) – 1,200 hrs normal use or 600 hrs severe operation

❐ 

Change engine oil and replace filter.

❐ 

Clean or replace air filter. 

❐ 

Replace fuel filter element.

❐ 

Change transmission and transfer case fluid.

❐ 

Change transmission filter.

❐ 

Check items in Maintenance Groups A, B, and C.

❐ 

Change geared hub oil. 

❐ 

Change axle oil.

42,000 Miles (67,600 km) – 1,400 hrs normal use or 700 hrs severe operation

❐ 

Change engine oil and replace filter.

❐ 

Check items in Maintenance Groups A and B.

48,000 Miles (77,200 km) – 1,600 hrs normal use or 800 hrs severe operation

❐ 

Change engine oil and replace filter.

❐ 

Clean or replace air filter. 

❐ 

Replace fuel filter element.

❐ 

Change transmission and transfer case fluid.

❐ 

Change transmission filter.

❐ 

Check items in Maintenance Groups A, B, and C.

❐ 

Change geared hub oil. 

❐ 

Change axle oil.

❐ 

Inspect brake fluid for moisture contamination.

54,000 Miles (86,900 km) - 1,800 hrs normal use or 900 hrs severe operation

❐ 

Change engine oil and replace filter.

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❐ 

Check items in maintenance Groups A and B.

60,000 Miles (96,500 km) - 2,000 hrs normal use or 1,000 hrs severe operation

❐ 

Change engine oil and replace filter.

❐ 

Clean or replace air filters.

❐ 

Replace fuel filter element.

❐ 

Change engine coolant.

❐ 

Change transmission and transfer case fluid.

❐ 

Inspect fuel tank, fuel cap and fuel lines. 

❐ 

Change transmission filter.

❐ 

Check items in Maintenance Groups A, B, and C.

❐ 

Change geared hub oil. 

❐ 

Change axle oil.

❐ 

Drain & replace brake fluid.

NOTE: Some maintenance requires specialized knowledge or equipment and may be best handled by qualified service technicians
at your nearest HUMMER dealer. 

NOTE: After your vehicle has been driven for 66,000 miles (106,200 km) repeat the schedule indicated in this section, starting at
6,000 mi (9,700 km). 

RECOMMENDED FUEL/FLUIDS/LUBRICANTS/CAPACITIES

Recommended Fuel

Recommended fuel for 6.6L diesel engines is #2 diesel. Do not use any other type fuel.

Engine Oil

Figure 1-18:   Oil Viscosity Chart 

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General Information, Lubrication and Maintenance

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Diesel engine oil capacities are:

• 10.5 qts (9.9L) without filter change

• 12.25 qts (11.6L) with filter change

• 2.0 qts (1.9L) for engine oil cooler

Refer to Section 2 for more information regarding engine oil. 

Engine Coolant

Recommended engine coolant is a mixture of ethylene glycol antifreeze and water.

Use a mixture containing 50% DEX-COOL  and 50% water.

Radiator capacity is 7 qts (6.6L). System capacity is approximately 33 qts (31.2L).

Transmission/Transfer Case/Steering Gear and Pump Fluid

Recommended lubricant for the transmission, transfer case, and steering system is Dexron III automatic transmission fluid.

Approximate fluid capacities are:

• 1 qt (0.95L) for the steering gear and pump

• 3.5 qts (3.3L) for the transfer case

• 14 qts (13.3L) for the transmission, converter, and cooler

• 8.2 qts (7.7L) for the transmission (during fluid drain/refill)

Brake Fluid

Recommended brake fluid for all HUMMER H1 vehicles is DOT 3 brake fluid. Master cylinder approximate capacity is 1.64 pints
(0.78L). Brake system approximate capacity is 3.12 pints (1.5L).

Front and Rear Axle Lubricant

Recommended lubricant for axles is HUMMER H1 Synthetic Gear Lube 75W-90 with friction modifier. The approximate capacity
for one axle is 2 qts (1.9L).

Geared Fan Drive

Recommended lubricant for the GFD is HUMMER H1 Synthetic Gear Lube 75W-90 with friction modifier. The approximate ca-
pacity is 1.2 pt (0.6L).

Geared Hub Lubricant

Recommended lubricant for hubs is a heavy duty, multipurpose, API GL-5 gear lubricant, with viscosity ratings of 80W-90 or
75W-90.

The 80W-90 is an all purpose lubricant. The 75W-90 lubricant is suggested for use in areas where winter temperatures are consis-
tently below freezing.

Steering Linkage and Suspension Lubricant

Recommended lubricant for steering and driveline components is an NLGI LB, or GC-LB grade multipurpose chassis grease. Use
only those lubricants that display the NLGI certification symbol.

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Body Lubrication

Door hinges, linkage parts, cables, and other body components can be lubricated with a number of different lubricants. Suggested
lubricants and applications are:

• Window regulator mechanisms – spray white grease

• Window slides – silicone spray lube

• Door hinges – engine oil, ATF, or LPS brand spray lube

• Linkage/cables – LPS brand silicone spray lube

• Lock strikers – chassis grease, white grease, or LPS #3.

• Seat track – multipurpose chassis grease (NLGI-LB)

• Lock mechanisms –ATF, silicone spray lube, graphite lube

A/C Refrigerant and Compressor Oil

The only refrigerant that can be used is R-134a. No other refrigerant is recommended.

The only compressor oil recommended is PAG (polyalkylene glycol). It is the only oil compatible with refrigerant R-134a. No
other oil is recommended. Any PAG oil used should be compatible with General Motors specifications. 

A/C system capacities are:

• 11 fluid ounces (325 ml) of PAG oil

• 3 lb 3 oz (1.45 kg) refrigerant

LUBRICATION AND MAINTENANCE ITEMS

Engine Oil Level

The engine oil dipstick is at the driver side of the engine (Figure-1-19). Correct oil level is to the “F” mark. 

Check oil level only when the engine is shut down and the vehicle is on a level surface. Wait one minute after shut down to check.

Never overfill the engine. The excess oil will be churned into foam causing oil film breakdown and consequent engine damage.

Figure 1-19:   Oil Dipstick Location

Engine Oil and Filter Change

The oil filter is located on the driver side of the engine (Figure-1-20). A front mounted fill tube is used. 

The spin-on oil filter is only removed with a standard band-type tool. Coat the seal on a new filter with oil and clean the adapter
surface before installation. Tighten the filter by hand. Replace filter every 6,000 mi (9,700 km).

The oil pan drain plug has a gasket that should be replaced if cut, cracked, or distorted. Check the gasket seating surface on the oil
pan. Burrs or nicks can be smoothed with a fine tooth file. Also replace the drain plug if the threads are worn or damaged. Be sure
the plug is tightened to required torque of 16 lb-ft (22 N•m).

OIL DIPSTICK

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