Removal Procedure

Fig 1: Identifying Lock Ring

Courtesy of GENERAL MOTORS CORP.

Remove the fuel tank. Refer to Fuel Tank Replacement .

CAUTION: Avoid damaging the lock ring. Use only J-45722 to prevent damage to the lock ring.

CAUTION: Do Not handle the fuel sender assembly by the fuel pipes. The amount of leverage generated by handling the fuel pipes could damage the joints.

NOTE: Do NOT use impact tools. Significant force will be required to release the lock ring. The use of a hammer and screwdriver is not recommended. Secure the fuel tank in order to prevent fuel tank rotation.

Use the J 45722 and a long breaker-bar in order to unlock the fuel sender lock ring.

Fig 2: View Of Sending Unit And Seal

Courtesy of GENERAL MOTORS CORP.

Remove the sending unit and seal. Discard the seal.
Clean the sending unit sealing surfaces.
If replacing the sender assembly, remove the fuel level sensor. Refer to Fuel Level Sensor Replacement .

Fig 3: Checking Lock Ring For Flatness

Courtesy of GENERAL MOTORS CORP.

NOTE:

Some lock rings were manufactured with "DO NOT REUSE" stamped into them. These lock rings may be reused if they are not damaged or warped.
Inspect the lock ring for damage due to improper removal or installation procedures. If damage is found, install a NEW lock ring.
Check the lock ring for flatness.

Place the lock ring on a flat surface. Measure the clearance between the lock ring and the flat surface using a feeler gage at 7 points.
If warpage is less than 0.41 mm (0.016 in), the lock ring does not require replacement.
If warpage is greater than 0.41 mm (0.016 in), the lock ring must be replaced.