K 1500 Yukon 4WD V8-5.3L VIN Z Flex Fuel (2003)
INSTALLATION PROCEDURE
1. Install NEW fuel injectors (3), if required.
2. Lubricate the lower fuel injector O-ring seals (4) with clean engine oil.
3. Install the fuel rail.
4. Apply a 5 mm (0.020 in) band of threadlock, GM P/N 12345382 (Canadian P/N 10953489), or equivalent, to the threads of the fuel rail bolts.
NOTE: Refer to the Fastener Notice in Service Precautions.
5. Install the fuel rail bolts.
Tighten
Tighten the bolts to ............................10 N.m (89 lb in).