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.
2003 Hummer H2FACTORY OEM SERVICE PROCEDURE
Cleaning Procedure
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.
- Disconnect the negative battery cable.
- Remove the fuel tank from the vehicle.
- Remove the fuel sender assembly from the fuel tank.
- Fill the fuel tank with hot water.
- Shake the fuel tank vigorously for 5 minutes.
- Drain the fuel tank.
- Ensure all of the water is removed from the fuel tank. If the inside of the fuel tank contains any traces of rust after cleaning, replace the fuel tank.
- Install the fuel sender assembly to the fuel tank.
- Install the fuel tank to the vehicle.
- Refill the fuel tank.
- Connect the negative battery cable.
- Check for fuel leaks and repair as necessary.
NOTE:
When flushing the fuel tank, handle the fuel and water mixture as a hazardous material. Handle the fuel and water mixture in accordance with all applicable local, state, and federal laws and regulations.
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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