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Home >> GMC >> 2005 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 4.8L, 5.3L & 6.0L (Repair Instructions - 1 Of 3) >> Repair Instructions (On-Vehicle And Off-Vehicle - Part 1) >> On-Vehicle Repair Instructions >> Valve Rocker Arm Cover Replacement - Left >> Removal Procedure

Removal Procedure

    Fig 1: View Of Main Ignition Coil Wire Harness Connector & Clips
    GM757686Courtesy of GENERAL MOTORS CORP.
  1. Remove the engine sight shield, if required. Refer to Engine Sight Shield Replacement (4.8L, 5.3L & 6.0L W/RPO LQ4)  or Engine Sight Shield Replacement (6.0L W/RPO LQ9) .
  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. 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: View Of Ignition Coil Bracket (Left)
    GM832184Courtesy of GENERAL MOTORS CORP.
  7. Remove the ignition coil bracket studs.
  8. Remove the ignition coil bracket.
    9. Fig 3: View Of PCV Hose
    GM1201537Courtesy of GENERAL MOTORS CORP.
  9. Remove the positive crankcase ventilation (PCV) hose.
    10. Fig 4: View Of Valve Rocker Arm Cover (Left)
    GM832209Courtesy of GENERAL MOTORS CORP.
  10. Loosen 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 and discard the old gasket (1).
  13. If required, clean and inspect the rocker arm cover. Refer to Valve Rocker Arm Cover Cleaning and Inspection .
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