Hummer H2. Manual - part 1882

Fig. 679: Throttle Body Gasket 
Courtesy of GENERAL MOTORS CORP. 

1. Install the throttle body studs, if required. 

Tighten: Tighten the throttle body studs to 6 N.m (53 lb in). 

NOTE:

Refer to Fastener Notice in Cautions and Notices.

IMPORTANT: DO NOT use the throttle body gasket again. Install a NEW gasket during 

assembly.

 

2004 Hummer H2 

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

  

2. Install the throttle body gasket (509) to the intake manifold. 

Fig. 680: Throttle Body & Nuts 
Courtesy of GENERAL MOTORS CORP. 

3. Install the throttle body and nuts. 

Tighten: Tighten the throttle body nuts to 10 N.m (89 lb in). 

4. Install the engine coolant air bleed hose and clamp to the throttle body.  

WATER PUMP INSTALLATION 

 

2004 Hummer H2 

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

  

Fig. 681: Water Pump, Bolts & Gaskets 
Courtesy of GENERAL MOTORS CORP. 

1. Install the water pump and NEW gaskets. 

2. Install the water pump bolts. 

Tighten:  

NOTE:

DO NOT use cooling system seal tabs, or similar compounds, unless 
otherwise instructed. The use of cooling system seal tabs, or similar 
compounds, may restrict coolant flow through the passages of the cooling 
system or the engine components. Restricted coolant flow may cause 
engine overheating and/or damage to the cooling system or the engine 
components/assembly.

IMPORTANT: All gasket surfaces to be free of oil or other foreign material during 

assembly.

NOTE:

Refer to Fastener Notice in Cautions and Notices.

 

2004 Hummer H2 

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

  

1. Tighten the water pump bolts first pass to 15 N.m (11 lb ft).  

2. Tighten the water pump bolts final pass to 30 N.m (22 lb ft).  

EXHAUST MANIFOLD INSTALLATION - LEFT 

Fig. 682: Exhaust Manifold, Gasket & Bolt (Left) 
Courtesy of GENERAL MOTORS CORP. 

IMPORTANT:

z

Tighten the exhaust manifold bolts as specified in the service 
procedure. Improperly installed and/or leaking exhaust manifold 
gaskets may affect vehicle emissions and/or On-Board Diagnostic 
(OBD) II system performance.  

z

The cylinder head exhaust manifold bolt hole threads must be clean 

 

2004 Hummer H2 

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