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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 35 (ENGINE CONTROL SYSTEM - SYSTEM & COMPONENT TESTING)EMISSION SYSTEMS & SUBSYSTEMSFUEL TANK LEAK TESTDIAGNOSTIC PROCEDURES
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Diagnostic Procedures
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Diagnostic Procedures
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.
- 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 1-2 psi (7-15 kPa) 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.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.