Removal Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Remove the intake manifold. Refer to INTAKE MANIFOLD REPLACEMENT in Engine Mechanical - 4.8L, 5.3L, and 6.0L.
Remove the coolant air bleed pipe studs (1).
Remove the coolant air bleed pipe (2) with gaskets (3).

Fig 1: Removing Coolant Air Bleed Pipe
Courtesy of GENERAL MOTORS CORP.
Remove the coolant air bleed pipe cover bolts (1) and covers (2).

Fig 2: Removing Coolant Air Bleed Pipe Cover Bolts And Covers
Courtesy of GENERAL MOTORS CORP.
Remove the gaskets from the coolant air bleed pipe and covers.
Discard the gaskets.

Fig 3: Removing Gaskets From Coolant Air Bleed Pipe And Covers
Courtesy of GENERAL MOTORS CORP.
Remove the coolant air bleed hose (1) from the pipe (2).

Fig 4: Removing Coolant Air Bleed Hose From Pipe
Courtesy of GENERAL MOTORS CORP.