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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 948 (Engine Mechanical - 4.3L) >> Repair Instructions - On Vehicle >> Engine Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Hood Hinge Normal And Service Position Bolt Holes
    GM310799Courtesy of GENERAL MOTORS CORP.
  1. Raise the hood to the service position, perform the following:
    1. Remove the hood hinge bolts (1).
    2. Raise the hood until vertical.
    3. Install the hood hinge bolts until snug in the service position (2).
  2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (w/Single Battery) or Battery Negative Cable Disconnection and Connection (w/Auxiliary Battery) or Battery Negative Cable Disconnection and Connection (w/Dual Batteries) .
  3. Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) or Cooling System Draining and Filling (Vac-N-Fill) .
  4. Remove the fuel pipes/hoses. Refer to Fuel Hose/Pipes Replacement - Engine Compartment .
  5. Remove the lower fan shroud. Refer to Engine Coolant Fan Lower Shroud Replacement (Mechanical) .
  6. Remove the drive belt. Refer to Drive Belt Replacement .
  7. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
    8. Fig 2: Identifying Oil Pan Skid Plate
    GM309158Courtesy of GENERAL MOTORS CORP.
  8. If equipped, remove the oil pan skid plate bolts and plate.
  9. If equipped, remove the engine shield. Refer to Engine Shield Replacement .
  10. Remove the starter. Refer to Starter Motor Replacement (4.3L) .
    11. Fig 3: Transmission Cover
    GM869720Courtesy of GENERAL MOTORS CORP.
  11. Remove the transmission cover.
    12. Fig 4: Positive Battery Cable Clip Bolt
    GM869722Courtesy of GENERAL MOTORS CORP.
  12. Remove the positive battery cable clip bolt (2).
  13. Remove the catalytic converter. Refer to Catalytic Converter Replacement (4.3L) .
    14. Fig 5: View Of Battery Cable Bracket Bolts
    GM310250Courtesy of GENERAL MOTORS CORP.
  14. Remove the battery cable bracket bolts.
    15. Fig 6: View Of Oil Level Sensor Electrical Connector, CKP Electrical Connector & Battery Ground Bolt
    GM782731Courtesy of GENERAL MOTORS CORP.
  15. Disconnect the crankshaft position (CKP) sensor electrical connector (5) and remove the harness from the retainer clip.
  16. Remove the ground bolt (3) holding the negative battery cable (6) and ground cable (4) to the engine.
    17. Fig 7: Flywheel-To-Torque Converter Bolts
    GM9096Courtesy of GENERAL MOTORS CORP.
  17. If equipped, remove the torque converter bolts.
  18. Remove the transmission bolts.
  19. Lower the vehicle.
    20. Fig 8: View Of Radiator Inlet Hose, Clamps & Thermostat Housing
    GM367002Courtesy of GENERAL MOTORS CORP.
  20. Reposition the radiator inlet hose clamp.
  21. Remove the radiator inlet hose from the thermostat housing.
    22. Fig 9: View Of Radiator Outlet Hose
    GM367001Courtesy of GENERAL MOTORS CORP.
  22. Reposition the radiator outlet hose clamps.
  23. Remove the radiator outlet hose from the surge tank.
  24. Remove the radiator outlet hose from the water pump.
    25. Fig 10: View Of A/C Pressure Switch & Compressor Clutch Connectors
    GM1878341Courtesy of GENERAL MOTORS CORP.
  25. Disconnect the following electrical connectors:
    • The A/C pressure switch (1), if equipped
    • The air conditioning (A/C) compressor clutch (2), if equipped
  26. If equipped, remove the air conditioning (A/C) hoses.
  27. Remove the positive cable nut and cable from the generator.
    28. Fig 11: View Of Engine Wiring Harness Clips
    GM1876870Courtesy of GENERAL MOTORS CORP.
  28. Remove the engine wiring harness clips (1, 2) from the engine harness brackets.
    29. Fig 12: View Of Engine Wiring Harness Rear Bracket & Bolts
    GM1876871Courtesy of GENERAL MOTORS CORP.
  29. Remove the engine wiring harness rear bracket bolts and bracket.
    30. Fig 13: View Of Engine Wiring Harness & Components
    GM1876492Courtesy of GENERAL MOTORS CORP.
  30. Disconnect the following electrical connectors:
    • Evaporative emission (EVAP) canister purge solenoid valve (1)
    • Manifold absolute pressure (MAP) sensor
    31. Fig 14: View Of Engine Wiring Harness & Components
    GM1876492Courtesy of GENERAL MOTORS CORP.
  31. Disconnect the engine wiring harness electrical connector (2) from the throttle body.
    32. Fig 15: View Of Ground Strap And CMP & Fuel Pump/Oil Pressure Sensor Connectors
    GM782680Courtesy of GENERAL MOTORS CORP.
  32. Disconnect the following electrical connectors:
    • Knock sensor (1)
    • Camshaft position (CMP) sensor (2)
    • Fuel pump/oil pressure sensor (3)
  33. Remove the harness ground bolt.
  34. Reposition the harness ground (4) and ground strap (5).
    35. Fig 16: View Of Engine Wiring Harness Bracket & Nuts
    GM310241Courtesy of GENERAL MOTORS CORP.
  35. Remove the engine wiring harness bracket nuts.
  36. Remove the engine wiring harness bracket from the studs.
    37. Fig 17: View Of Junction Block Bracket Bolts
    GM782670Courtesy of GENERAL MOTORS CORP.
  37. Remove the junction block bracket bolt.
  38. Reposition the bracket and wiring harness aside.
    39. Fig 18: Engine Wiring Harness Bracket Stud & Rear Bracket Nut
    GM782176Courtesy of GENERAL MOTORS CORP.
  39. Remove the engine wiring harness rear bracket nut at the EVAP canister purge solenoid valve.
  40. Remove the stud holding the engine wiring harness bracket.
  41. Reposition the engine wiring harness with the bracket aside.
  42. Remove the heater hoses. Refer to Heater Inlet Hose Replacement and Heater Outlet Hose Replacement .
    43. Fig 19: View Of EVAP Canister Purge Solenoid Valve Tube Quick Connect Fitting
    GM1876612Courtesy of GENERAL MOTORS CORP.
  43. Disconnect the EVAP canister harness (1) from the purge solenoid valve.
    44. Fig 20: View Of Engine Wiring Harness Electrical Connector
    GM1876873Courtesy of GENERAL MOTORS CORP.
  44. Disconnect the engine wiring harness electrical connector (7) from the ignition coil.
  45. Disconnect the power brake booster vacuum hose from the vacuum fitting.
    46. Fig 21: View Of Power Steering Pump Bracket
    GM340090Courtesy of GENERAL MOTORS CORP.
  46. Loosen the power steering (P/S) pump rear bracket nut.
  47. Remove the P/S pump rear bracket front nut.
  48. Remove the bolts and the nut for the P/S pump bracket.
  49. Leave the A/C compressor, if equipped, and the P/S pump on the bracket.
  50. Slide the P/S pump bracket forward off the stud and set aside.
  51. Remove the thermostat and water outlet. Refer to Engine Coolant Thermostat Replacement (LU3) .
    52. Fig 22: Engine Lift Brackets J 41427
    GM33636Courtesy of GENERAL MOTORS CORP.
  52. Remove the left front and right rear intake manifold lower bolts.
  53. Install J 41427  to the left front and right rear intake manifold bolts, using the following procedure:
    1. Install the J 41427  marked RIGHT REAR.
      NOTE: Refer to Fastener Notice .
    2. Install the lift bracket bolts.

      Tighten:  Tighten the bolts to 15 N.m (11 lb ft).

    3. Install the J 41427  marked LEFT FRONT with the arrow pointing to the front of the engine.
    4. Install the lift bracket bolts.

      Tighten:  Tighten the bolts to 15 N.m (11 lb ft).

  54. Install a suitable lifting devise to the engine lift brackets.
    55. Fig 23: Engine Mount To Engine Mount Bracket & Bolts
    GM310259Courtesy of GENERAL MOTORS CORP.
  55. Remove the engine mount to engine mount bracket nuts.
  56. Support the transmission with a suitable floor jack.
  57. Remove the engine.
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