Silverado Classic 2500 4WD V8-6.6L DSL Turbo (2007)
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Inspect the lock ring for damage due to improper removal or installation procedures. If damage is found, install a NEW lock ring.
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Check the lock ring for flatness.
6. 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.
7. If warpage is less than 0.41 mm (0.016 in), the lock ring does not require replacement.
8. If warpage is greater than 0.41 mm (0.016 in), the lock ring must be replaced.
INSTALLATION PROCEDURE
1. Install the sending unit and a NEW seal.
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.
