Suburban 1/2 Ton 2WD V8-5.3L VIN Z Flex Fuel (2006)
Flexible Fuel Sensor: Service and Repair
FUEL COMPOSITION SENSOR REPLACEMENT
REMOVAL PROCEDURE
1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure.
2. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
3. If equipped, remove the transfer case shield. Refer to one of the following:
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Transfer Case Shield Replacement in Transfer Case BW 4481 - NR3
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Transfer Case Shield Replacement in Transfer Case BW 4482 - NR4
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Transfer Case Shield Replacement in Transfer Case NVG 246 - NP8
4. Disconnect the fuel composition sensor electrical connector.
5. Remove the fuel line retainers (1).
6. Disconnect the fuel composition sensor fuel lines.
