Hummer H2. Manual - part 1713

1. Remove the throttle body. Refer to Throttle Body Assembly Replacement .  

2. Remove the fuel injectors. Refer to Fuel Injector Replacement . 

Fig. 56: MAP Sensor & Knock Sensor Electrical Connectors 
Courtesy of GENERAL MOTORS CORP. 

3. Disconnect the following electrical connectors: 

z

Manifold absolute pressure (MAP) sensor (1)  

z

Knock sensor (2)  

4. Remove the knock sensor harness electrical connector from the intake manifold.  

5. Set the electrical harness aside. 

IMPORTANT: The intake manifold, throttle body, fuel rail, and injectors may be removed 

as an assembly. If not servicing the individual components, remove the 
manifold as a complete assembly.

 

2004 Hummer H2 

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

  

Fig. 57: MAP Sensor & Intake Manifold 
Courtesy of GENERAL MOTORS CORP. 

6. Remove the MAP sensor (1) from the intake manifold. 

 

2004 Hummer H2 

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

  

Fig. 58: Top View Of Engine 
Courtesy of GENERAL MOTORS CORP. 

7. Remove the evaporative emission (EVAP) purge solenoid vent tube by performing the following: 

1. Remove the EVAP tube end (2) from the solenoid (1).  

2. Squeeze the EVAP pipe quick connect fitting (3) retainer together.  

3. Remove the EVAP tube end (3) from the vapor pipe. 

 

2004 Hummer H2 

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

  

Fig. 59: EVAP Purge Solenoid Bolt, Solenoid & Isolator 
Courtesy of GENERAL MOTORS CORP. 

8. Remove the EVAP purge solenoid bolt (2), solenoid (3), and isolator (1) from the intake manifold. 

 

2004 Hummer H2 

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