Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2005CHEVY EXPRESS H1500, VAN PASSENGERREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 1 (ENGINE CONTROL SYSTEM - 4.3L - INTRODUCTION)REPAIR INSTRUCTIONSEVAPORATIVE EMISSION (EVAP) HOSES/PIPES REPLACEMENT - ENGINEREMOVAL PROCEDURE

2005 Chevrolet Chevy Express H1500, Van Passenger

Removal Procedure

2005 Chevrolet Chevy Express H1500, Van PassengerSECTION Removal Procedure

WARNING: This page is about a different variant/trim than selected.

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

Courtesy of GENERAL MOTORS CORP.

Clean the pipe connections and the surrounding areas before disconnecting in order to avoid possible contamination of the EVAP system.
Disconnect the engine compartment EVAP pipe at the EVAP canister purge valve.

Fig 2: View Of EVAP Pipe, Fuel Feed/Return Pipes & Engine Compartment Pipes

Courtesy of GENERAL MOTORS CORP.

Disconnect the engine compartment EVAP pipe (1) at the chassis EVAP pipe (2).
Remove the EVAP pipe from the engine.
Cap the EVAP canister purge valve and the chassis EVAP pipe in order to prevent possible EVAP system contamination.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.