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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1019 (Engine Mechanical - 4.8L, 5.3L & 6.0L (Repair Instructions - 1 Of 3)) >> Repair Instructions (On-Vehicle & Off-Vehicle - Part 1) >> On-Vehicle Repair Instructions >> Valve Rocker Arm Cover Replacement - Right >> Removal Procedure

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.
  1. If equipped with regular production option (RPO) HP2, disconnect the energy storage box (ESB). Refer to Energy Storage Box (ESB) Service Disconnect/Connect (5.3L Engine w/RPO HP2) in Engine Electrical.
  2. 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) .
  3. Remove the connector position assurance (CPA) lock (5).
  4. Disconnect the main electrical connector (4) to the ignition coil wire harness.
  5. Remove the harness clips (1).
    6. Fig 1: View Of CPA Retainer, Harness Clips, ETC, Coil Harness & Fuel Injectors Electrical Connectors
    GM1235686Courtesy of GENERAL MOTORS CORP.
  6. Reposition the engine harness, if necessary.
  7. 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.
  8. Reposition the surge tank/heater hoses from the heater hose bracket.
  9. Remove the heater hose bracket nut and bracket.
    10. Fig 2: View Of Heater Hose Bracket Nut
    GM688018Courtesy of GENERAL MOTORS CORP.
  10. If equipped with RPO HP2, remove the auxiliary heater water pump bracket nuts (4).
  11. Remove the auxiliary heater water pump from the studs, and reposition out of the way.
    12. Fig 3: View Of Auxiliary Heater Water Pump, Bracket & Nuts
    GM1285626Courtesy of GENERAL MOTORS CORP.
  12. If equipped with RPO HP2, remove the starter/generator control module (SGCM) cover bolts, and cover.
    13. Fig 4: View Of SGCM, Cover & Bolts
    GM1237061Courtesy of GENERAL MOTORS CORP.
  13. Remove the 3-phase cable nuts to the SGCM.
  14. Remove the 3-phase cable from the SGCM.
  15. If equipped with RPO HP2, remove the 3-phase cable bracket nuts (2).
  16. Remove the 3-phase cable bracket (1) from the studs, and reposition the cable and bracket out of the way.
    17. Fig 5: View Of 3-Phase Cable Bracket & Nuts
    GM1237062Courtesy of GENERAL MOTORS CORP.
  17. Remove the ignition coil bracket studs.
  18. Remove the ignition coil bracket.
    19. Fig 6: View Of Ignition Coil Bracket (Right)
    GM832187Courtesy of GENERAL MOTORS CORP.
  19. Remove the positive crankcase ventilation (PCV) hose.
    20. Fig 7: View Of Throttle Body To Valve Rocker Arm Cover PCV Hose
    GM1235681Courtesy of GENERAL MOTORS CORP.
  20. Loosen the valve rocker arm cover bolts.
  21. Remove the valve rocker arm cover.
    22. Fig 8: View Of Valve Rocker Arm Cover (Right)
    GM832211Courtesy of GENERAL MOTORS CORP.
  22. Remove and discard the old gasket (1).
    23. Fig 9: Rocker Arm Cover Gasket
    GM490696Courtesy of GENERAL MOTORS CORP.
  23. Remove the oil fill tube from the rocker cover, if required.
    24. Fig 10: View Of Oil Fill Tube
    GM647798Courtesy of GENERAL MOTORS CORP.
  24. If required, clean and inspect the rocker arm cover. Refer to Valve Rocker Arm Cover Cleaning and Inspection .
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