Hummer H2. Manual - part 1774

Fig. 285: Oil Level Indicator & Tube 
Courtesy of GENERAL MOTORS CORP. 

1. Remove the oil level indicator from the tube.  

2. Remove the oil level indicator tube bolt.  

3. Remove the oil level indicator tube from the engine block. 

4. Remove the O-ring seal from the tube, if required. 

IMPORTANT: Inspect the O-ring seal for cuts or damage. The O-ring seal may be used 

again if it is not cut or damaged.

 

2004 Hummer H2 

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

  

EXHAUST MANIFOLD REMOVAL - LEFT

Fig. 286: Exhaust Manifold, Gasket & Bolt (Left) 
Courtesy of GENERAL MOTORS CORP. 

1. Remove the spark plug wires from the spark plugs. 

Do not remove the spark plug wires from the ignition coils unless required. 

2. Remove the exhaust manifold, bolts, and gasket.  

3. Discard the gasket. 

 

2004 Hummer H2 

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

  

Fig. 287: Exhaust Manifold & Heat Shield 
Courtesy of GENERAL MOTORS CORP. 

4. Remove the heat shield (603) and bolts (604) from the manifold (600), if required.  

EXHAUST MANIFOLD REMOVAL - RIGHT 

 

2004 Hummer H2 

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

  

Fig. 288: Exhaust Manifold, Gasket & Bolt (Right) 
Courtesy of GENERAL MOTORS CORP. 

1. Remove the spark plug wires from the spark plugs. 

Do not remove the spark plug wires from the ignition coils unless required. 

2. Remove the exhaust manifold, bolts, and gasket.  

3. Discard the gasket. 

 

2004 Hummer H2 

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