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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1158 (Engine Mechanical - 3.6L (3 Of 6)) >> On-Vehicle Repair Instructions (2 Of 2) >> Cylinder Head Replacement - Left Side (LLT) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the left bank secondary timing chain. Refer to Secondary Camshaft Drive Chain Replacement - Left Side .
  2. Remove the oil level indicator. Refer to Oil Level Indicator and Tube Replacement (LY7) or Oil Level Indicator and Tube Replacement (LLT) .
  3. Remove the fuel pump. Refer to Fuel Pump Replacement (LLT) .
    4. Fig 1: View Of Coolant Temperature Sensor And Electrical Connector
    GM945424Courtesy of GENERAL MOTORS CORP.
  4. Remove the heat shield from the coolant temperature sensor and disconnect the coolant temperature sensor electrical connector.
    5. Fig 2: View Of Left Cylinder Head Wiring Harness Ground Bolt
    GM945431Courtesy of GENERAL MOTORS CORP.
  5. Remove the wiring harness ground from the cylinder head.
  6. Disconnect the wiring harness electrical connector located at the side of the cylinder head.
  7. Remove the wiring harness connector bracket from the side of the cylinder head.
    8. IMPORTANT: DO NOT disconnect the power steering pipes and/or hoses.
  8. Remove the power steering pump bolts. Refer to Power Steering Pump Replacement .
  9. Remove the surge tank hose from the bracket at the rear of the cylinder head.
  10. Remove the wiring harness bracket from the rear of the cylinder head.
  11. Remove the catalytic converter. Refer to Catalytic Converter Replacement - Left Side .
  12. Remove the oil level indicator. Refer to Oil Level Indicator and Tube Replacement (LY7) or Oil Level Indicator and Tube Replacement (LLT) .
    13. IMPORTANT: Do not remove the oil filter adapter.
  13. Remove the oil filter adapter upper bolt.
    14. Fig 3: Identifying Cylinder Head and Exhaust Manifold Assembly
    GM1979425Courtesy of GENERAL MOTORS CORP.
  14. Remove the cylinder head (1) with the exhaust manifold. Refer to Cylinder Head Removal - Right Side (LY7) or Cylinder Head Removal - Right Side (LLT) .
    15. Fig 4: View Of Left Cylinder Head Gasket
    GM902814Courtesy of GENERAL MOTORS CORP.
  15. Remove and discard the cylinder head gasket.
  16. Clean and inspect the cylinder head and the engine block sealing surfaces. Refer to Cylinder Head Cleaning and Inspection (LY7) or Cylinder Head Cleaning and Inspection (LLT) and Engine Block Cleaning and Inspection .
  17. If necessary, perform the following steps:
    1. Remove the exhaust manifold from the cylinder head. Refer to Exhaust Manifold Removal - Left Side .
    2. Disassemble the cylinder head. Refer to Cylinder Head Disassemble (LY7) or Cylinder Head Disassemble (LLT) .
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