Removal Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Loosen the air cleaner outlet duct clamp at the mass airflow/intake air temperature (MAF/IAT) sensor.

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

Fig 2: Positive Crankcase Ventilation (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.
Remove the heater outlet hose from the clip.
Move and secure the heater hoses out of the way.

Fig 5: Heater Outlet Hose & Clip
Courtesy of GENERAL MOTORS CORP.
Disconnect the following electrical connectors:
- The ignition coil (1)
- The ignition coil drive (2)
- The generator (3)
Disconnect the engine wiring harness clips.
Reposition the engine wiring harness.

Fig 6: Ignition Coil, Ignition Coil Drive & Generator Electrical Connectors
Courtesy of GENERAL MOTORS CORP.
Remove the rocker arm cover bolts.
Remove and discard the rocker arm cover bolt grommets, if necessary.
Remove the rocker arm cover.

Fig 7: Rocker Arm Cover & Bolts
Courtesy of GENERAL MOTORS CORP.
Remove and discard the rocker arm cover gasket.
Clean and inspect the rocker arm cover, if necessary. Refer to Valve Rocker Arm Cover Cleaning and Inspection .

Fig 8: Rocker Arm Cover & Gasket
Courtesy of GENERAL MOTORS CORP.