Removal Procedure

Remove the fuel tank. Refer to Fuel Tank Replacement .
Remove all dirt and debris from the area around the fuel sender assembly and the fuel tank.
Remove the fuel lines from the sender assembly. Refer to Fuel Hose/Pipes Assembly Replacement .

Fig 1: Identifying Lock Ring

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: 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. See Special Tools . Turn the fuel sender lock ring in a counterclockwise direction.

Fig 2: Fuel Sender Assembly

Courtesy of GENERAL MOTORS CORP.

CAUTION: Drain the fuel from the fuel sender assembly into an approved container in order to reduce the risk of fire and personal injury. Never store the fuel in an open container.

Remove the fuel sender assembly and seal.
Remove the seal from the fuel tank. Discard the seal.

Fig 3: Checking Lock Ring For Flatness

Courtesy of GENERAL MOTORS CORP.

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

NOTE: 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.

IMPORTANT:

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