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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Engine Mechanical - 4.3L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Valve Rocker Arm Cover Replacement - Right >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: View Of Air Cleaner Outlet Duct Clamp
    GM360851Courtesy of GENERAL MOTORS CORP.
  1. Loosen the air cleaner outlet duct clamp at the mass airflow/intake air temperature (MAF/IAT) sensor.
    2. Fig 2: View Of Positive Crankcase Ventilation (PCV) Hose
    GM701705Courtesy of GENERAL MOTORS CORP.
  2. Remove the positive crankcase ventilation (PCV) hose.
    3. Fig 3: View Of Air Cleaner Adapter Nut
    GM489179Courtesy of GENERAL MOTORS CORP.
  3. Remove the air cleaner adapter nut.
    4. Fig 4: View Of Air Cleaner Outlet Duct
    GM489176Courtesy of GENERAL MOTORS CORP.
  4. 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.
    5. Fig 5: Heater Outlet Hoses
    GM869719Courtesy of GENERAL MOTORS CORP.
  5. Remove the heater outlet hose from the clip.
  6. Move and secure the heater hoses out of the way.
    7. Fig 6: Ignition Coil, Ignition Coil Driver, Ground Nut/Cable & Generator Electrical Connectors
    GM782177Courtesy of GENERAL MOTORS CORP.
  7. Disconnect the following electrical connectors:
    • The ignition coil (1)
    • The ignition coil drive (2)
    • The generator (3)
  8. Disconnect the engine wiring harness clips.
  9. Reposition the engine wiring harness.
    10. Fig 7: Rocker Arm Cover
    GM869731Courtesy of GENERAL MOTORS CORP.
  10. Remove the rocker arm cover bolts.
  11. Remove and discard the rocker arm cover bolt grommets, if necessary.
  12. Remove the rocker arm cover.
    13. Fig 8: View Of Rocker Arm Cover And Gasket
    GM328573Courtesy of GENERAL MOTORS CORP.
  13. Remove and discard the rocker arm cover gasket.
  14. Clean and inspect the rocker arm cover, if necessary. Refer to Valve Rocker Arm Cover Cleaning and Inspection .
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