Hummer H2. Manual — part 1769

Courtesy of GENERAL MOTORS CORP.

61. If equipped with the 4.8L, 5.3L, or 6.0L with RPO LQ4, install the engine sight shield to the retainer.

62. Tighten the engine sight shield bolt.

Tighten: Tighten the bolt to 10 N.m (89 lb in).

63. Install the heater hoses. Refer to Heater Hose Replacement - Inlet and Heater Hose Replacement -

Outlet in Heating, Ventilation and Air Conditioning.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

Fig. 267: Radiator Outlet Hose & Water Pump
Courtesy of GENERAL MOTORS CORP.

64. Install the radiator outlet hose to the water pump.

65. Position the radiator outlet hose clamp at the water pump.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

Fig. 268: Radiator Inlet Hose & Water Pump (4.8, 5.3, & 6.0L)
Courtesy of GENERAL MOTORS CORP.

66. Install the radiator inlet hose to the water pump.

67. Position the radiator inlet hose clamp at the water pump.

68. Install the radiator supports. Refer to Radiator Support Replacement in Body Front End.

69. Install the A/C compressor. Refer to Compressor Replacement in Heating, Ventilation and Air

Conditioning.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

70. Install the hood. Refer to Hood Replacement in Body Front End.

71. Fill the crankcase with the proper quantity and grade of engine oil. Refer to Capacities - Approximate

Fluid orFluid and Lubricant Recommendations in Maintenance and Lubrication.

72. Perform the CKP system variation learn procedure. Refer to CKP System Variation Learn Procedure

in Engine Controls-6.0L.

1. Disable the ignition system.

2. Crank the engine several times. Listen for any unusual noises or evidence that parts are binding.

3. Enable the ignition system.

4. Start the engine and listen for unusual noises.

5. Check the vehicle oil pressure gauge or light and confirm that the engine has acceptable oil

pressure.

6. Run the engine speed at about 1000 RPM until the engine has reached normal operating

temperature.

7. Listen for sticking lifter and other unusual noises.

8. Inspect for fuel, oil and/or coolant leaks while the engine is running.

9. Perform a final inspection for the proper engine oil and coolant levels.

73. Close the hood.

ENGINE OIL AND OIL FILTER REPLACEMENT

Removal Procedure

IMPORTANT: After an overhaul, the engine should be tested. Use the following

procedure after the engine is installed in the vehicle.

IMPORTANT: In order to completely drain the oil from the oil pan internal baffling, the bottom

of the oil pan must be level during the oil drain procedure.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2