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 MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 975 (ENGINE CONTROLS - 4.3L (INTRODUCTION))REPAIR INSTRUCTIONSFUEL HOSE/PIPES REPLACEMENT - CHASSISREMOVAL PROCEDURE

2003 Chevrolet TrailBlazer 4.2 S, 4WD

Removal Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Clean all the fuel feed/return and evaporative emission (EVAP) pipe connections and surrounding areas before disconnecting the pipes in order to avoid possible fuel/EVAP system contamination.

Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Resonator Replacement .
Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure .
Disconnect the fuel feed/return pipes (4) at the engine pipes (5).
Disconnect the EVAP pipe (1).

Fig 1: View Of EVAP Pipe, Fuel Feed/Return Pipes & Engine Compartment Pipes

Courtesy of GENERAL MOTORS CORP.

Cap the fuel feed/return and EVAP pipes in order to prevent possible fuel/EVAP system contamination.
Remove the fuel feed/return pipe bracket nut.
Remove the fuel feed/return pipe bracket from the stud.
Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

Fig 2: View Of Fuel Feed/Return Pipe & EVAP Pipe Clip

Courtesy of GENERAL MOTORS CORP.

Remove the fuel feed/return pipe and EVAP pipe clip from the transmission.
If equipped with 4-wheel drive (4WD), remove the fuel feed/return and EVAP pipes from the clip on the transfer case.
Remove the EVAP canister. Refer to Evaporative Emission (EVAP) Canister Replacement .
Disconnect the fuel feed/return pipes at the fuel tank pipes. Refer to Quick Connect Fitting(s) Service (Plastic Collar) .
Cap the fuel tank pipes.

Fig 3: View Of Fuel Feed/Return Pipes At Fuel Tank

Courtesy of GENERAL MOTORS CORP.

Remove the fuel feed/return and EVAP pipe clip nuts.
Disconnect the fuel feed/return and EVAP pipe clips
Remove the fuel feed/return and EVAP pipe assembly.

Fig 4: View Of Fuel Feed/Return & EVAP Pipe Assembly

Courtesy of GENERAL MOTORS CORP.

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.