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 MANUALSCHEVROLET2003VENTURE BASE, VAN CARGO EXTENDEDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALENGINE EXHAUST SYSTEMREPAIR INSTRUCTIONSCATALYTIC CONVERTER REPLACEMENTINSTALLATION PROCEDURE
2003 Chevrolet Venture Base, Van Cargo Extended
Installation Procedure
2003 Chevrolet Venture Base, Van Cargo ExtendedSECTION Installation Procedure
NOTE:
To prevent internal damage to the flexible coupling of catalytic converter assembly, the converter must be supported. The vertical movement at the rear of the catalytic converter assembly must not exceed 6 degrees up or down.
- Install a new catalytic converter gasket.
- Install a new exhaust manifold pipe gasket.
- Position and support the new 3-way catalytic converter under the vehicle.
- Install the exhaust pipe to the 3-way catalytic converter with the catalytic converter nuts. Do not tighten the nuts.
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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.