Removal Procedure

Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure .
Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
If equipped, remove the transfer case shield. Refer to one of the following:
- Transfer Case Shield Replacement in Transfer Case BW 4481 - NR3
- Transfer Case Shield Replacement in Transfer Case BW 4482 - NR4
- Transfer Case Shield Replacement in Transfer Case NVG 246 - NP8

Fig 1: View Of Fuel Composition Sensor Electrical Connector

Courtesy of GENERAL MOTORS CORP.

Fig 2: View Of Fuel Line Retainers

Courtesy of GENERAL MOTORS CORP.

Remove the fuel line retainers (1).
Disconnect the fuel composition sensor fuel lines. Refer to Quick Connect Fitting(s) Service (Metal Collar) .

Fig 3: View Of Fuel Composition Sensor, Bracket & Bracket Nuts

Courtesy of GENERAL MOTORS CORP.

Remove the fuel composition sensor bracket nuts.
Remove the fuel composition sensor.
If required, remove the fuel composition sensor bolts and remove the sensor from the bracket.