Hummer H2. Manual — part 1465

Fig. 140: View Of Rear Engine
Courtesy of GENERAL MOTORS CORP.

1. Clean all the EVAP pipe connections and the surrounding areas before disconnecting the pipes in order to

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

avoid possible contamination of the EVAP system.

2. Disconnect the engine compartment EVAP pipe (6) from the chassis EVAP pipe (3).

3. Cap the engine compartment EVAP pipe.

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

5. Remove the left hand catalytic converter. Refer to Catalytic Converter Replacement (Right Hand) in

Engine Exhaust.

6. Remove the EVAP pipe from the bellhousing stud clip (4).

7. Remove the EVAP pipe from the transmission bracket clip.

Fig. 141: Vent Pipe & EVAP Canister Vent Valve Electrical Connector
Courtesy of GENERAL MOTORS CORP.

8. Disconnect the rear EVAP purge pipe from the EVAP canister.

2004 Hummer H2

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

9. Cap the rear EVAP purge pipe.

10. Note the position of the EVAP pipe for aid in installation.

11. Remove the EVAP pipe from the retaining clips.

12. Remove the EVAP pipe.

Installation Procedure

1. Install the EVAP pipe into the retaining clips.

Fig. 142: Vent Pipe & EVAP Canister Vent Valve Electrical Connector
Courtesy of GENERAL MOTORS CORP.

2. Remove the cap from the rear EVAP pipe.

3. Connect the rear EVAP purge pipe to the EVAP canister.

2004 Hummer H2

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

Fig. 143: View Of Rear Engine
Courtesy of GENERAL MOTORS CORP.

4. Install the EVAP pipe into the transmission bracket clip.

5. Install the EVAP pipe into the bellhousing stud clip (4).

6. Install the left hand catalytic converter. Refer to Catalytic Converter Replacement (Right Hand) in

Engine Exhaust.

7. Lower the vehicle.

2004 Hummer H2

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