Hummer H2. Manual - part 1786

Fig. 332: Drilling Out Oil Pan Gasket Retaining Rivets 
Courtesy of GENERAL MOTORS CORP. 

6. Drill (2) out the oil pan gasket retaining rivets (1), if required.  

7. Remove the gasket (426) from the pan.  

8. Discard the gasket and rivets. 

IMPORTANT:

z

DO NOT allow foreign material to enter the oil passages of the oil 
pan, cap or cover the openings as required.  

z

Use care not to gouge, score, or damage the oil pan sealing surface. 

 

2004 Hummer H2 

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

  

Fig. 333: Oil Pan Baffle & Bolts 
Courtesy of GENERAL MOTORS CORP. 

9. Remove the oil pan baffle bolts and baffle, if required.  

ENGINE FRONT COVER REMOVAL 

 

2004 Hummer H2 

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

  

Fig. 334: Front Cover & Gasket 
Courtesy of GENERAL MOTORS CORP. 

1. Remove the front cover bolts.  

2. Remove the front cover and gasket.  

3. Discard the front cover gasket. 

 

2004 Hummer H2 

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

  

Fig. 335: Crankshaft Front Oil Seal 
Courtesy of GENERAL MOTORS CORP. 

4. Remove the crankshaft front oil seal (140) from the cover.  

ENGINE REAR COVER REMOVAL 

 

2004 Hummer H2 

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