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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1619 (Engine Mechanical - 4.8L, 5.3L & 6.0L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Valve Rocker Arm Cover Replacement - Right >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the engine sight shield, if required. Refer to Engine Sight Shield Replacement (4.8L, 5.3L, and 6.0L Engines)  or Engine Sight Shield Replacement (6.0L Engine w/RPOs Y91 and Z88) .
  2. Remove the connector position assurance (CPA) lock.
  3. Disconnect the main electrical connector (1) to the ignition coil wire harness.
  4. Remove the harness clips (2).
  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.
    Fig 1: Main Electrical Connector & Harness Clips
    G02106649Courtesy of GENERAL MOTORS CORP.
  7. Reposition the surge tank/heater hoses from the heater hose bracket.
  8. Remove the heater hose bracket nut and bracket.
    Fig 2: Removing Heater Hose Bracket Nut & Bracket
    G02106650Courtesy of GENERAL MOTORS CORP.
  9. Remove the ignition coil bracket studs.
  10. Remove the ignition coil bracket.
    Fig 3: Removing Ignition Coil Bracket & Studs
    G02106651Courtesy of GENERAL MOTORS CORP.
  11. Remove the positive crankcase ventilation (PCV) hose.
    Fig 4: Removing Positive Crankcase Ventilation (PCV) Hose
    G02106652Courtesy of GENERAL MOTORS CORP.
  12. Loosen the valve rocker arm cover bolts.
  13. Remove the valve rocker arm cover.
    Fig 5: Removing Valve Rocker Arm Cover
    G02106653Courtesy of GENERAL MOTORS CORP.
  14. Remove and discard the old gasket (1).
    Fig 6: Removing Gasket
    G02106654Courtesy of GENERAL MOTORS CORP.
  15. Remove the oil fill tube from the rocker cover, if required.
  16. If required, clean and inspect the rocker arm cover. Refer to Valve Rocker Arm Cover Cleaning and Inspection .
    Fig 7: Removing Oil Fill Tube
    G02106655Courtesy of GENERAL MOTORS CORP.
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