Yukon XL 4WD V8-5.3L (2011)
1. If the intake manifold was replaced perform the following steps, otherwise proceed to step 21.
Note: Evenly push in the RED collar in order to install the nipple.
2. Install the brake booster vacuum hose nipple to the NEW intake manifold.
3. Install NEW fuel injector lower O-ring seals onto the injectors.
4. Lubricate the NEW O-ring seals with clean engine oil.
Note: Push down firmly on both sides of the rail until all the injectors have been seated into their bores.
5. Install the fuel rail.
Caution: Refer to Fastener Caution See: Service Precautions/Vehicle Damage Warnings/Fastener Caution.
6. Install the fuel rail bolts and tighten to 10 Nm (89 lb in).
