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.
2009 Hummer H3 AlphaFACTORY OEM SERVICE PROCEDURE
Fuel System Cleaning
- Remove the fuel tank fuel pump module. Refer to Fuel Tank Fuel Pump Module Replacement .
- Inspect the fuel strainer. Replace the module if the strainer is contaminated.
- Inspect the fuel pump inlet for dirt and debris. Replace the module if dirt or debris is found in the fuel pump inlet.
- Flush the fuel tank with hot water.
- Pour the water out of the module opening. Rock the tank to be sure that removal of the water from the tank is complete.
- Install the fuel tank fuel pump module. Refer to Fuel Tank Fuel Pump Module Replacement .
IMPORTANT:
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
Use the Manual With the Right Hardware
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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.