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 MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN PASSENGER EXTENDED, 5.0 MREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 119 (ENGINE CONTROL SYSTEM - SYSTEM & COMPONENT TESTING)FUEL SYSTEMSFUEL TANK LEAK TEST
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M
Fuel Tank Leak Test
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION Fuel Tank Leak Test
WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Place a dry chemical (Class B) fire extinguisher near the area before performing a fuel tank leak check. Before removing the fuel tank for a suspected leak, ensure the fuel pipes or the tubes are not leaking onto the tank. Once removed, ensure the fuel is not leaking around the fuel sender "O" ring. Failure to follow these precautions may result in personal injury.
- Drain the fuel tank.
- Remove the fuel tank.
- Plug the fuel feed hose, the fuel limiter vent valve hose, and the fuel tank vent valve hose on the fuel tank.
- Plug the fuel filler neck opening.
- Connect a piece of the hose to the breather hose nipple on the fuel tank and secure the hose with one clamp.
- Submerge the fuel tank in water or apply a soapy solution to the outside of the tank.
- Apply 7-15 kPa (1-2 psi) air pressure to the breather hose.
- Air bubbles appearing from the fuel tank indicate a leak.
- Replace the fuel tank if the tank is leaking.
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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.