Hummer H2. Manual - part 1793

Fig. 359: Crankshaft Bearings & Bearing Caps 
Courtesy of GENERAL MOTORS CORP. 

10. Remove the crankshaft bearings from the bearing caps and the engine block.  

11. Mark, sort, or organize the crankshaft bearings so they may be installed to their original position and 

location. Refer to Separating Parts .  

ENGINE BLOCK PLUG REMOVAL 

 

2004 Hummer H2 

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

  

Tools Required 

J 41712 Oil Pressure Switch Socket 

Fig. 360: Oil Pressure Sensor & J 41712 
Courtesy of GENERAL MOTORS CORP. 

IMPORTANT:

z

Do not remove the engine block front oil gallery plug unless service 
is required.  

z

If the front oil gallery plug is removed for service, a NEW oil gallery 
plug must be installed.  

 

2004 Hummer H2 

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

  

1. Remove the oil pressure sensor, if not previously removed, using the J 41712 or equivalent. 

Fig. 361: Identifying Plug Location On Underside Of Block 
Courtesy of GENERAL MOTORS CORP. 

2. Remove the engine block right rear coolant drain hole plug. 

 

2004 Hummer H2 

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

  

Fig. 362: Engine Block Coolant Heater 
Courtesy of GENERAL MOTORS CORP. 

3. Remove the engine block coolant heater, if applicable. 

 

2004 Hummer H2 

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