Sierra 1500 2WD V8-5.3L VIN B HO (2006)
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Cap the fittings and plug the holes when servicing the fuel system in order to prevent dirt and other contaminants from entering open pipes and
passages.
IMPORTANT: Before removal, clean the fuel rail with a spray type engine cleaner, such as GM X-30A or equivalent, if necessary. Follow the
package instructions. Do not soak the fuel rail in liquid cleaning solvent.
20. Remove the fuel injector lower O-ring seal (4) from each injector, if necessary.
21. Discard the O-ring seal.
INSTALLATION PROCEDURE
1. Lubricate NEW fuel injector lower O-ring seals (4) with clean engine oil.
2. Install the NEW O-ring seals (4) onto each injector, if necessary.
3. Install the fuel rail.
4. Apply a 5 mm (0.2 in) band of threadlock GM P/N 12345382 (Canadian P/N 10953489), or equivalent to the threads of the fuel rail bolts.
5. Install the fuel rail bolts.
NOTE: Refer to the Fastener Notice in Service Precautions.
Tighten the bolts to 10 N.m (89 lb in).