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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 421 (Engine Mechanical - 4.8L, 5.3L, & 6.0L (On-Vehicle)) >> Repair Instructions >> Valve Rocker Arm Cover Replacement - Left >> Removal Procedure

Removal Procedure

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    Fig 1: Left Ignition Coil Electrical Connectors & Harness Clips
    GM679597Courtesy of GENERAL MOTORS CORP.
  1. Remove the engine sight shield, if required. Refer to Engine Sight Shield Replacement (4.8L, 5.3L, and 6.0L (LQ4))  or Engine Sight Shield Replacement (6.0L (LQ9)) .
  2. Remove the connector position assurance (CPA) lock.
  3. Disconnect the main electrical connector (2) feeding the ignition coils.
  4. Remove the harness clips (1).
  5. Reposition the engine harness, if necessary.
  6. Remove the spark plug wires from the ignition coils.
    • Twist each plug wire 1/2 turn.
    • Pull only on the boot in order to remove the wire from the ignition coil.
    7. Fig 2: Right Ignition Coil, Bracket & Studs
    GM647790Courtesy of GENERAL MOTORS CORP.
  7. Remove the ignition coil bracket studs from the rocker arm cover.
  8. Remove the ignition coils and bracket from the rocker arm cover.
    9. Fig 3: Breather Crossover Tube View
    GM647793Courtesy of GENERAL MOTORS CORP.
  9. Remove the positive crankcase ventilation (PCV) hose from the rocker arm cover.
    10. Fig 4: Valve Cover To Cylinder Head View
    GM260085Courtesy of GENERAL MOTORS CORP.
  10. Remove the valve rocker arm cover bolts.
  11. Remove the valve rocker arm cover.
    12. Fig 5: Rocker Arm Cover Gasket
    GM490696Courtesy of GENERAL MOTORS CORP.
  12. Remove the gasket (1) from the rocker cover.
  13. Discard the OLD gasket.
  14. Clean and inspect the rocker arm cover. Refer to Valve Rocker Arm Cover Cleaning and Inspection in Engine Mechanical - 4.8L, 5.3L, and 6.0L Unit Repair.
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