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