Hummer H2. Manual - part 1466

8. Remove the cap from the engine compartment EVAP pipe.  

9. Connect the engine compartment EVAP pipe (6) to the chassis EVAP pipe (3).  

EVAPORATIVE EMISSION (EVAP) SYSTEM HOSES/PIPES REPLACEMENT (EVAP VENT PIPE) 

Removal Procedure 

Fig. 144: EVAP Vent Pipe & Mounting Clips 
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: When replacing the EVAP pipe, always replace the pipe with original equipment 

or parts that meet the GM specifications for this part. The replacement pipe 
must have the same type of fittings as the original pipe in order to ensure the 
integrity of the connection.

 

2004 Hummer H2 

2004 ENGINE PERFORMANCE Engine Controls (Introduction) - 4.8L, 5.3L, and 6.0L - Hummer H2

  

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.  

2. Clean all the EVAP pipe connections and the surrounding areas before disconnecting in order to avoid 

possible contamination of the EVAP system.  

3. Disconnect the EVAP vent pipe at the EVAP canister.  

4. Disconnect the EVAP vent pipe at the EVAP vent valve.  

5. Remove the EVAP vent pipe from the mounting clips (1,3,4, and 5).  

6. Cap the EVAP vent valve and the EVAP canister in order to prevent possible EVAP system 

contamination.  

Installation Procedure 

Fig. 145: EVAP Vent Pipe & Mounting Clips 
Courtesy of GENERAL MOTORS CORP.

 

2004 Hummer H2 

2004 ENGINE PERFORMANCE Engine Controls (Introduction) - 4.8L, 5.3L, and 6.0L - Hummer H2

  

1. Remove the caps from the EVAP vent valve and the EVAP canister.  

2. Connect the EVAP vent pipe (2) to the EVAP vent valve.  

3. Connect the EVAP vent pipe to the EVAP canister.  

4. Install the EVAP vent pipe into the mounting clips (1,3,4, and 5).  

5. Lower the vehicle.  

EVAPORATIVE EMISSION (EVAP) SYSTEM HOSES/PIPES REPLACEMENT (REAR EVAP FUEL 
TANK PIPE) 

Removal Procedure 

IMPORTANT: When replacing the EVAP pipe, always replace the pipe with original equipment 

or parts that meet the GM specifications for this part. The replacement pipe 
must have the same type of fittings as the original pipe in order to ensure the 
integrity of the connection.

 

2004 Hummer H2 

2004 ENGINE PERFORMANCE Engine Controls (Introduction) - 4.8L, 5.3L, and 6.0L - Hummer H2

  

Fig. 146: Fuel Tank Straps & Attaching Bolts 
Courtesy of GENERAL MOTORS CORP. 

1. Disconnect the negative battery cable.  

2. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure .  

3. Drain the fuel tank. Refer to Fuel Tank Draining Procedure .  

4. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.  

5. Clean all fuel and EVAP pipe and hose connections and the surrounding areas before disconnection in 

CAUTION: Refer to the Battery Disconnect Caution in Cautions and Notices.

 

2004 Hummer H2 

2004 ENGINE PERFORMANCE Engine Controls (Introduction) - 4.8L, 5.3L, and 6.0L - Hummer H2