Sierra Denali RWD V8-6.2L (2009)
2. Install the NEW fuel injector upper and lower O-ring seals (2 and 4) onto the injectors.
3. Install the fuel injectors (3) into the fuel rails.
4. Install the fuel injector retainers (1).
5. Ensure the fuel injector lower O-ring seals are adequately lubricated, if not lubricate the fuel injector lower O-ring seals with clean engine oil.
6. Position the fuel rail onto the intake manifold.
7. Firmly push down on both the centers of the left and right fuel rails, until the rails are fully seated against the intake manifold.
Caution: Refer to Fastener Caution (See: Service Precautions/Vehicle Damage Warnings/Fastener Caution) .
Note
Push down firmly on both sides of the rail until all injectors have been seated into their bores.
8. Install the fuel rail bolts.
Tighten the bolts to 10 Nm (89 lb in).