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 MANUALSCHEVROLET2001CAVALIER LS, 2.4 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 66 (ENGINE CONTROLS - REMOVAL & INSTALLATION)FUEL SYSTEMS (CNG)FILL LINE UNION (CHECK VALVE)REMOVAL
2001 Chevrolet Cavalier LS, 2.4 T
Fill Line Union (Check Valve): Removal
2001 Chevrolet Cavalier LS, 2.4 TSECTION Removal
WARNING: This page is about a different car, the 2003 Pontiac Sunfire and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The fill line union may also be referred to as check valve.
- Relieve the CNG fuel system pressure. See FUEL SYSTEM PRESSURE RELEASE (CNG) .
- Disconnect the negative battery cable.
- Remove the fuel tank cover. See Figure.
- Remove the tank vent boot cover nuts and the cover.
- Disconnect the three harness connectors.
- Loosen the clamp at the tank vent boot and peel back the boot to expose the union. See Figure.
- Disconnect the fill lines at the union.
- Remove the fill line union.
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.