Grand Prix V8-5.3L (2007)
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.
Important: Inspect the lock ring for damage due to improper removal or installation procedures. If damage is found, install a NEW lock
ring.
Important: Check the lock ring for flatness.
9. 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.
10. If the warpage is less than 0.41 mm (0.016 in), the lock ring does not require replacement.
11. If the warpage is greater than 0.41 mm (0.016 in), the lock ring must be replaced.
Installation Procedure
1. Position the NEW fuel sender O-ring seal onto the fuel tank.
2. Install the fuel sender (2) into the fuel tank. Ensure that the align tab is in the proper location.
3. Push down the fuel sender and position the lock ring (1) onto the fuel tank.
