Hummer H2. Manual - part 1754

3. Remove the automatic transmission engine flywheel. 

Fig. 208: Bolts & Spacer Threaded Holes 
Courtesy of GENERAL MOTORS CORP. 

4. Install two M11x1.5 mm bolts (1) to the threaded holes of the spacer, if applicable.  

5. Rotate the bolts clockwise to remove the spacer. 

 

2004 Hummer H2 

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

  

Fig. 209: Spacer & Crankshaft Rear 
Courtesy of GENERAL MOTORS CORP. 

6. Remove the spacer from the rear of the crankshaft, if applicable.  

Installation Procedure 

IMPORTANT:

z

The flywheel does not use a locating pin for alignment and will not initially 
seat against the crankshaft flange or spacer (if applicable), but will be 
pulled onto the crankshaft by the engine flywheel bolts. This procedure 
requires a three stage tightening process.  

z

Certain applications (6.0L) require a spacer and longer bolts for proper 

 

2004 Hummer H2 

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

  

Fig. 210: Spacer & Crankshaft Rear 
Courtesy of GENERAL MOTORS CORP. 

1. Install the spacer (if applicable) onto the rear of the crankshaft. 

flywheel position.  

 

2004 Hummer H2 

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

  

Fig. 211: Engine Flywheel & Bolts (Automatic Transmission) 
Courtesy of GENERAL MOTORS CORP. 

2. Install the automatic transmission engine flywheel to the crankshaft.  

3. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the threads of the 

flywheel bolts. 

IMPORTANT: Longer flywheel bolts must be used on applications using a flywheel 

spacer.

 

2004 Hummer H2 

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