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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1444 (Engine Mechanical - 5.3L (Lm4)) >> Repair Instructions >> 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 Envoy XUV, 2004 GMC Envoy XL, 2004 Chevrolet TrailBlazer, and 2004 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Top Of Engine Wiring Harness View
    GM898326Courtesy of GENERAL MOTORS CORP.
  1. Remove the connector position assurance (CPA) lock.
  2. Disconnect the main electrical connector (5) to the ignition coil wire harness.
  3. Remove the harness clips.
  4. Reposition the engine harness, if necessary.
  5. 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.
    6. Fig 2: Identifying Ignition Coils
    GM824413Courtesy of GENERAL MOTORS CORP.
  6. If necessary, remove the ignition coil bracket studs from the rocker arm cover.
  7. If necessary, remove the ignition coils and bracket from the rocker arm cover.
    8. Fig 3: Breather Crossover Tube View
    GM647793Courtesy of GENERAL MOTORS CORP.
  8. Remove the positive crankcase ventilation (PCV) hose from the rocker arm cover.
    9. Fig 4: Valve Cover To Cylinder Head View
    GM260085Courtesy of GENERAL MOTORS CORP.
  9. Remove the valve rocker arm cover bolts.
  10. Remove the valve rocker arm cover.
    11. Fig 5: Rocker Arm Cover Gasket
    GM490696Courtesy of GENERAL MOTORS CORP.
  11. Remove the gasket (1) from the rocker cover.
  12. Discard the OLD gasket.
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