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Home >> Chevrolet >> 2013 >> Tahoe LS, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Mechanical - Hybrid (LZ1) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Valve Rocker Arm Cover Replacement - Right Side >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
    WARNING:

    Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

    The High Voltage Disabling procedure will perform the following tasks:

    • Identify how to disable high voltage.
    • Identify how to test for the presence of high voltage.
    • Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

    Failure to follow the procedures exactly as written may result in serious injury or death.

    Fig 1: Locating 3 Phase Cable Clip Nut & Engine Bracket
    GM1965809Courtesy of GENERAL MOTORS COMPANY
  1. Disable the high voltage system. Refer to High Voltage Disabling .
  2. Remove the intake manifold cover. Refer to Upper Intake Manifold Sight Shield Replacement .
  3. Remove the generator control module 3 phase cable clip nut (1).
  4. Remove the generator control module 3 phase cable clip from the engine bracket (2).
  5. Reposition the generator control module 3 phase cables out of the way.
    6. Fig 2: View Of CPA Retainer, Engine Harness Electrical Connectors & Harness Clips
    GM1696893Courtesy of GENERAL MOTORS COMPANY
  6. Remove the connector position assurance (CPA) retainer (2).
  7. Disconnect the engine harness electrical connector (1) from the ignition coil wire harness.
  8. Remove the engine wiring harness (electronic throttle control branch) clip (6) from the ignition coil bracket stud.
  9. Reposition the engine wiring harness (electronic throttle control branch) as necessary.
    10. Fig 3: Locating Heater Inlet Hose & Heater Hose Bracket
    GM1970079Courtesy of GENERAL MOTORS COMPANY
  10. Remove the heater inlet hose (2) from the heater hose bracket (3).
    11. Fig 4: Locating Heater Outlet Hose & Heater Hose Bracket
    GM1970080Courtesy of GENERAL MOTORS COMPANY
  11. Remove the surge tank outlet hose (2) from the heater hose bracket (3).
    12. Fig 5: Locating Heater Hose Bracket & Nut
    GM1970081Courtesy of GENERAL MOTORS COMPANY
  12. Remove the heater hose bracket nut (1) and bracket (2).
    13. Fig 6: Ignition Coils & Bracket
    GM1402028Courtesy of GENERAL MOTORS COMPANY
  13. Remove the spark plug wires (724) 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.
  14. Remove the ignition coil bracket studs (720).
  15. Remove the ignition coil bracket (719).
    16. Fig 7: View Of PCV Tube & Right Valve Rocker Arm Cover Fitting
    GM1696757Courtesy of GENERAL MOTORS COMPANY
  16. Remove the positive crankcase ventilation (PCV) tube (1) from the valve rocker cover (2).
    17. Fig 8: View Of Valve Rocker Arm Cover (Right)
    GM832211Courtesy of GENERAL MOTORS COMPANY
  17. Loosen the valve rocker arm cover bolts.
  18. Remove the valve rocker arm cover.
    19. Fig 9: Rocker Arm Cover Gasket
    GM490696Courtesy of GENERAL MOTORS COMPANY
  19. Remove and discard the old gasket (1).
    20. Fig 10: Oil Fill Cap & Oil Fill Tube
    GM1559860Courtesy of GENERAL MOTORS COMPANY
  20. Remove the oil fill cap (424) from the oil fill tube (423), if necessary.
  21. Remove and discard the oil fill tube, if necessary.
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