Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 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 and Filling Cooling System (without HP2) .
Loosen the air cleaner outlet duct clamp at the mass airflow/intake air temperature (MAF/IAT) sensor.

Fig 1: View Of Air Cleaner Outlet Duct Clamp

GM360851

Courtesy of GENERAL MOTORS CORP.

Remove the positive crankcase ventilation (PCV) hose.

Fig 2: Positive Crankcase Ventilation (PCV) Hose

GM701705

Courtesy of GENERAL MOTORS CORP.

Remove the air cleaner adapter nut.

Fig 3: View Of Air Cleaner Adapter Nut

GM489179

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: View Of Air Cleaner Outlet Duct

GM489176

Courtesy of GENERAL MOTORS CORP.

Reposition the inlet hose clamp at the water outlet.
Remove the inlet hose from the water outlet.

Fig 5: View Of Radiator Inlet Hose & Thermostat Housing

GM367002

Courtesy of GENERAL MOTORS CORP.

Remove the water outlet studs.

Fig 6: View Of Water Outlet Studs

GM42901

Courtesy of GENERAL MOTORS CORP.

Remove the water outlet.

Fig 7: View Of Water Outlet

GM42895

Courtesy of GENERAL MOTORS CORP.

Remove the thermostat.

Fig 8: View Of Thermostat

GM42903

Courtesy of GENERAL MOTORS CORP.

Clean the sealing surface of the water outlet.
Clean the sealing surface of the intake manifold.
Remove and discard the O-ring seal.