Yukon XL 4WD V8-5.3L (2011)
5. Carefully lift the fuel tank module from the fuel tank enough to access the quick connect fittings below the module cover. Disconnect the quick
connect fittings. Refer to Plastic Collar Quick Connect Fitting Service See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Line
Coupler/Service and Repair/Plastic Collar Quick Connect Fitting Service.
6. Remove the fuel tank module.
7. Remove and discard the fuel tank module seal.
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.
8. Place the lock ring on a flat surface. Measure the clearance between the lock ring and the flat surface using a feeler gauge at 7 points.
9. If warpage is less than 0.41 mm (0.016 in), the lock ring does not require replacement.
10. If warpage is greater than 0.41 mm (0.016 in), the lock ring must be replaced.
Installation Procedure
