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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 - Left >> 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. 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 (2) to the ignition coil wire harness.
  4. Remove the harness clips (1).
    5. Fig 1: View Of Main Ignition Coil Wire Harness Connector & Clips
    GM757686Courtesy of GENERAL MOTORS CORP.
  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. Remove the ignition coil bracket studs.
  8. Remove the ignition coil bracket.
    9. Fig 2: View Of Ignition Coil Bracket (Left)
    GM832184Courtesy of GENERAL MOTORS CORP.
  9. Remove the positive crankcase ventilation (PCV) hose.
    10. Fig 3: View Of PCV Hose
    GM1201537Courtesy of GENERAL MOTORS CORP.
  10. Loosen the valve rocker arm cover bolts.
  11. Remove the valve rocker arm cover.
    12. Fig 4: View Of Valve Rocker Arm Cover (Left)
    GM832209Courtesy of GENERAL MOTORS CORP.
  12. Remove and discard the old gasket (1).
    13. Fig 5: Rocker Arm Cover Gasket
    GM490696Courtesy of GENERAL MOTORS CORP.
  13. If required, clean and inspect the rocker arm cover. Refer to Valve Rocker Arm Cover Cleaning and Inspection .
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