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 (with HP2) or Draining and Filling Cooling System (without HP2) in Engine Cooling.
Loosen the air cleaner outlet duct clamps at the following locations:

Fig 1: View Of Air Cleaner Outlet Duct (W/HP2 Front)
Courtesy of GENERAL MOTORS CORP.
- Throttle body
- Mass airflow/intake air temperature (MAF/IAT) sensor
Remove the radiator inlet hose clip from the outlet duct.
Remove the air cleaner outlet duct.
Reposition the inlet heater hose clamp from the engine.

Fig 2: Removing/Installing Heater Hose To Engine
Courtesy of GENERAL MOTORS CORP.
Remove the inlet heater hose from the engine.
Reposition the inlet heater hose clamp (4) from the auxiliary water pump (1).

Fig 3: Inlet Heater Hose Clamp And Auxiliary Water Pump (W/ HP2 Front)
Courtesy of GENERAL MOTORS CORP.
Remove the inlet heater hose (6) from the auxiliary water pump (1).