Removal Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Radiator Vent Inlet Hose

Courtesy of GENERAL MOTORS CORP.

If replacing the rear coolant air bleed covers, remove the intake manifold. Refer to Intake Manifold Replacement (RPOs LC9, LMG, LY5, L76) , Intake Manifold Replacement (RPOs LY2, LY6) , Intake Manifold Replacement (Except RPOs LY2, LY6, LC9, LMG, LY5) . Otherwise proceed to the next step.
Remove the air cleaner outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement .
Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) .
Reposition the radiator vent inlet hose clamp (1) at the coolant air bleed pipe fitting.
Remove the radiator vent inlet hose (2) from the coolant air bleed pipe fitting.

Fig 2: Engine Coolant Air Bleed Pipe

Courtesy of GENERAL MOTORS CORP.

Remove the coolant air bleed pipe bolts (309) (intake manifold shown removed for clarity).
Remove the coolant air bleed pipe (307) and seals (308).

Fig 3: Coolant Air Bleed Cover Bolts

Courtesy of GENERAL MOTORS CORP.

Remove the coolant air bleed cover bolts (312), if required.
Remove the coolant air bleed covers (313) and seals (308), if required.

Fig 4: Coolant Air Bleed Pipe Seal

Courtesy of GENERAL MOTORS CORP.

Remove the seals (308) from the coolant air bleed pipe and/or covers.
Discard the seals.