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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls And Fuel - 6.2L - Introduction (2 Of 2) >> Repair Instructions >> Evaporative Emission Hose/Pipe Replacement - Chassis >> Removal Procedure

Removal Procedure

IMPORTANT: When replacing the evaporative emission (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.
    Fig 1: View Of Rear Of Engine Fuel Pipe Connections
    GM300360Courtesy of GENERAL MOTORS CORP.
  1. Clean all the EVAP pipe connections and the surrounding areas before disconnecting the pipes in order to 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 .
  5. Remove the left hand catalytic converter. Refer to Catalytic Converter Replacement .
  6. Remove the EVAP pipe from the bellhousing stud clip (4).
  7. Remove the EVAP pipe from the transmission bracket clip.
    8. Fig 2: Vent Pipe & EVAP Canister Vent Valve Electrical Connector
    GM832914Courtesy of GENERAL MOTORS CORP.
  8. Disconnect the rear EVAP purge pipe from the EVAP canister.
  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.
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