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 MANUALSCHEVROLET2005TRAILBLAZER 4WD V8-5.3L VIN MREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSFUEL LEVEL SENSORSERVICE AND REPAIRFUEL SENDER ASSEMBLY REPLACEMENT
2005 Chevrolet TrailBlazer 4WD V8-5.3L VIN M
Fuel Sender Assembly Replacement
2005 Chevrolet TrailBlazer 4WD V8-5.3L VIN MSECTION Fuel Sender Assembly Replacement
FUEL SENDER ASSEMBLY REPLACEMENT
TOOLS REQUIRED
J 44402 Fuel Tank Sending Unit Wrench
REMOVAL PROCEDURE
1. Remove the fuel tank.
2. Remove the fuel feed (1) and EVAP (2) lines from the fuel sender assembly.
3. Using J 44402, remove the fuel sender lock ring (1).
4. Remove the fuel sender assembly (2) and seal (3). Discard the seal.
5. Clean the fuel sender sealing surfaces (4).
CAUTION: Refer to Fuel Storage Caution in Service Precautions.
INSTALLATION PROCEDURE
1. Install a NEW seal (3) onto the fuel tank.
IMPORTANT: Never reuse the old seal or a fuel leak may occur. Always use a NEW seal.
2. Install the fuel sender assembly (2).
IMPORTANT: Place the fuel pump strainer in a horizontal position when you install the fuel sender in the tank. When installing the fuel sender assembly, assure that the fuel pump strainer does not block full travel of the float arm.
3. Using J 44402, install the fuel sender lock ring (1).
4. Install the fuel feed (1) and EVAP (2) lines to the sender assembly.
5. Install the fuel tank.
RENDER: 1.0x
NO RELATED
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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.