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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 144 (Engine Mechanical - 4.3L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Cylinder Head Replacement - Left >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 GMC Savana and 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnect/Connect Procedure .
  2. Remove the engine cover. Refer to Engine Cover Replacement in Interior Trim .
  3. Drain the engine coolant. Refer to DRAINING AND FILLING COOLING SYSTEM .
  4. Remove the fan shroud. Refer to FAN SHROUD REPLACEMENT .
  5. Remove the drive belt. Refer to Drive Belt Replacement .
  6. Remove the air conditioning compressor discharge hose, if equipped. Refer to DISCHARGE HOSE REPLACEMENT .
  7. Remove the air conditioning compressor suction hose, if equipped. Refer to SUCTION HOSE REPLACEMENT .
  8. Remove the mounting bolts (2) for the air conditioning compressor (1), if equipped.
  9. Move the compressor aside and support.
  10. Remove the drive belt idler pulley if not equipped with A/C. Refer to Drive Belt Idler Pulley Replacement - without Air Conditioning .
  11. Remove the power steering pump pulley. Refer to POWER STEERING PULLEY REPLACEMENT .
    Fig 1: Removing Mounting Bolts & Air Conditioning Compressor
    G02077777Courtesy of GENERAL MOTORS CORP.
  12. Remove the 3 bolts holding the power steering pump to the power steering pump mounting bracket.

    The power steering pump can remain on the engine.

    Fig 2: Removing Power Steering Pump To Power Steering Pump Mounting Bracket Bolts
    G02077778Courtesy of GENERAL MOTORS CORP.
  13. Remove the 3 bolts and nut holding the power steering pump mounting bracket to the engine.
  14. Slide the power steering pump mounting bracket off the stud and power steering pump.
    Fig 3: Removing Power Steering Pump Mounting Bracket To Engine Bolts & Nut
    G02077779Courtesy of GENERAL MOTORS CORP.
  15. Remove the power steering pump mounting bracket stud from the cylinder head.
    Fig 4: Removing Power Steering Pump Mounting Bracket Stud
    G02077776Courtesy of GENERAL MOTORS CORP.
  16. Remove the lower intake manifold. Refer to Intake Manifold Replacement - Lower .
  17. Remove the exhaust manifold. Refer to EXHAUST MANIFOLD REPLACEMENT-LEFT (4.3L) or EXHAUST MANIFOLD REPLACEMENT - LEFT (4.8L, 5.3.L, 6.0L) .
  18. Remove the ground wires at the rear of the cylinder head.
  19. Remove the transmission control cable bracket.
  20. Remove the valve pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
    Fig 5: Removing Ground Wires At Rear Of Cylinder Head
    G02077780Courtesy of GENERAL MOTORS CORP.
  21. Remove the engine coolant temperature sensor if applicable.
    Fig 6: Removing Engine Coolant Temperature Sensor
    G02077781Courtesy of GENERAL MOTORS CORP.
  22. Remove the engine coolant temperature gage sensor if applicable.
    Fig 7: Removing Engine Coolant Temperature Gage Sensor
    G02077782Courtesy of GENERAL MOTORS CORP.
  23. Remove the spark plugs.
    Fig 8: Removing Spark Plugs
    G02077783Courtesy of GENERAL MOTORS CORP.
  24. Remove the bolts and the spark plug wire support.
    Fig 9: Removing Bolts & Spark Plug Wire Support
    G02077784Courtesy of GENERAL MOTORS CORP.
  25. Remove the cylinder head bolts.
    Fig 10: Removing Cylinder Head Bolts
    G02077785Courtesy of GENERAL MOTORS CORP.
  26. Remove the cylinder head.
    Fig 11: Removing Cylinder Head
    G02077786Courtesy of GENERAL MOTORS CORP.
  27. Remove and discard the cylinder head gasket.
    Fig 12: Removing Cylinder Head Gasket
    G02077787Courtesy of GENERAL MOTORS CORP.
  28. Remove the dowel pins cylinder head locator if required.
  29. Clean the engine block and the cylinder head sealing surfaces.
    CAUTION: Clean all dirt, debris, and coolant from the engine block cylinder head bolt holes. Failure to remove all foreign material may result in damaged threads, improperly tightened fasteners or damage to components.
  30. Clean the cylinder head bolts and the engine block bolt holes.
    Fig 13: Removing Dowel Pins
    G02077788Courtesy of GENERAL MOTORS CORP.
  31. For further service to the cylinder head refer to the following: Cylinder Head Disassemble , Cylinder Head Cleaning and Inspection , Valve Guide Reaming/Valve and Seat Grinding  or Cylinder Head Assemble  .
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