Avalanche 4WD V8-5.3L (2011)
Note: Position the O-ring seal (308) onto the nipple portion of the pipe.
1. Install the seals onto the coolant air bleed pipe and/or covers.
2. Install the coolant air bleed pipe (307) and seals (308) onto the cylinder heads.
Caution: Refer to Fastener Caution See: Service Precautions/Vehicle Damage Warnings/Fastener Caution.
3. Install the coolant air bleed pipe bolts (309) and tighten to 12 Nm (106 lb in).