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Home >> Chevrolet >> 2005 >> Chevy Express H1500, Van Passenger >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Control System - 4.3L - Introduction) >> Repair Instructions >> Evaporative Emission (EVAP) Hoses/Pipes Replacement - Engine >> Removal Procedure

Removal Procedure

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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: Evaporative Emission (EVAP) Purge Pipe
    GM309184Courtesy of GENERAL MOTORS CORP.
  1. Clean the pipe connections and the surrounding areas before disconnecting in order to avoid possible contamination of the EVAP system.
  2. Disconnect the engine compartment EVAP pipe at the EVAP canister purge valve.
  3. Fig 2: View Of EVAP Pipe, Fuel Feed/Return Pipes & Engine Compartment Pipes
    GM583167Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the engine compartment EVAP pipe (1) at the chassis EVAP pipe (2).
  5. Remove the EVAP pipe from the engine.
  6. Cap the EVAP canister purge valve and the chassis EVAP pipe in order to prevent possible EVAP system contamination.