Removal Procedure

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Drain the cooling system. Refer to Draining & Filling Cooling System .
Loosen the air cleaner outlet duct clamp at the mass airflow/intake air temperature (MAF/IAT) sensor.

Fig 1: Air Cleaner Outlet Duct
Courtesy of GENERAL MOTORS CORP.
Remove the positive crankcase ventilation (PCV) hose.

Fig 2: PCV Hose
Courtesy of GENERAL MOTORS CORP.
Remove the air cleaner adapter nut.

Fig 3: Air Cleaner Adapter Nut
Courtesy of GENERAL MOTORS CORP.
In order to remove the air cleaner outlet duct, pivot the duct upward until the hinge clip releases from the lip on the throttle body.

Fig 4: Air Cleaner Outlet Duct
Courtesy of GENERAL MOTORS CORP.
Reposition the inlet hose clamp at the water outlet.
Remove the inlet hose from the water outlet.

Fig 5: Inlet Hose From Water Outlet
Courtesy of GENERAL MOTORS CORP.
Remove the water outlet studs.

Fig 6: Water Outlet Studs
Courtesy of GENERAL MOTORS CORP.
Remove the water outlet.

Fig 7: Water Outlet & Thermostat
Courtesy of GENERAL MOTORS CORP.
Remove the thermostat.
Clean the sealing surface of the water outlet.
Clean the sealing surface of the intake manifold.
Remove and discard the O-ring seal.