Sierra Classic 2500 4WD V8-8.1L (2007)
7. 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.
8. If warpage is less than 0.41 mm (0.016 in), the lock ring does not require replacement.
9. If warpage is greater than 0.41 mm (0.016 in), the lock ring must be replaced.
INSTALLATION PROCEDURE
1. CAUTION: In order to reduce the risk of fire and personal injury that may result from a fuel leak, always replace the fuel sender gasket
when reinstalling the fuel sender assembly.
IMPORTANT: The fuel strainer must be in a horizontal position when installing the sending unit is installed in the tank. When installing
the sending unit, assure that the fuel strainer does not block full travel of the float arm.
Install a NEW sending unit seal.
2. Install the sending unit.
IMPORTANT: Always replace the fuel sender seal when installing the fuel sender assembly. Replace the lock ring if necessary. DO NOT
apply any type of lubrication in the seal groove.
3. Ensure the lock ring is installed with the correct side facing upward. A correctly installed lock ring will only turn in a clockwise direction.
Use the J 45722 in order to install the fuel sender lock ring. Turn the fuel sender lock ring in a clockwise direction.
4. Connect the EVAP line to the sending unit.
5. Connect the fuel line to the sending unit.
6. Install the fuel tank.
