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.
2000 Chevrolet Venture V6-3.4L VIN EFACTORY OEM SERVICE PROCEDURE
Fuel Tank Leak Test
IMPORTANT: Before attempting the Fuel Tank Leak Check place a dry chemical (Class B) fire extinguisher near the work area.
1. Install the J 41415-40 Fill Tank Cap Adaptor.
2. Connect the J 41413 [1][2]EVAP Pressure/Purge Diagnostic Station to the fill tank cap adaptor.
3. With a scan tool, seal the EVAP system.
4. Raise the vehicle on a hoist. Refer to Vehicle Lifting Caution in Service Precautions.
5. With the Evaporative Emission System ([1][2]EVAP) diagnostic station, maintain 15 in. H2O (3.75 kPa) within the fuel tank.
IMPORTANT: It may be necessary to partially lower the fuel tank to inspect the top of the fuel tank and fuel sender assembly O-ring. Refer to Fuel Tank Replacement.
6. With the J 41416 ultrasonic leak detector, test for leaks in the fuel tank and [1][2]EVAP pipes.
7. Visually inspect for fuel leaking from the fuel tank.
8. If a leak is detected refer to the following component replacements:
- Fuel tank leak, refer to Fuel Tank Replacement.
- Fuel sender O-ring or fuel sender leak, refer to Fuel Sender Assembly Replacement.
- Fuel or [1][2]EVAP pipe leak, refer to Fuel Hose/Pipes Replacement (Filter to Tank) in Fuel Supply Line or Fuel Return Line.
1. Install the J 41415-40 Fill Tank Cap Adaptor.
2. Connect the J 41413 [1][2]EVAP Pressure/Purge Diagnostic Station to the fill tank cap adaptor.
3. With a scan tool, seal the EVAP system.
4. Raise the vehicle on a hoist. Refer to Vehicle Lifting Caution in Service Precautions.
5. With the Evaporative Emission System ([1][2]EVAP) diagnostic station, maintain 15 in. H2O (3.75 kPa) within the fuel tank.
IMPORTANT: It may be necessary to partially lower the fuel tank to inspect the top of the fuel tank and fuel sender assembly O-ring. Refer to Fuel Tank Replacement.
6. With the J 41416 ultrasonic leak detector, test for leaks in the fuel tank and [1][2]EVAP pipes.
7. Visually inspect for fuel leaking from the fuel tank.
8. If a leak is detected refer to the following component replacements:
- Fuel tank leak, refer to Fuel Tank Replacement.
- Fuel sender O-ring or fuel sender leak, refer to Fuel Sender Assembly Replacement.
- Fuel or [1][2]EVAP pipe leak, refer to Fuel Hose/Pipes Replacement (Filter to Tank) in Fuel Supply Line or Fuel Return Line.
Factory Service Tools
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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.
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