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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 344 (Engine Mechanical - 5.3L, 6.0L & 6.2L - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Engine Replacement >> Removal Procedure

Removal Procedure

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  1. Place the hood in the service position. Refer to Hood Service Positioning .
  2. Remove the hood latch. Refer to Hood Primary and Secondary Latch Replacement .
  3. Remove the front end upper tie bar. Refer to Front End Upper Tie Bar Replacement .
  4. Remove the intake manifold. Refer to Intake Manifold Replacement (RPOs LC9, LMG, LY5, L76) , Intake Manifold Replacement (RPOs LY2, LY6) , Intake Manifold Replacement (Except RPOs LY2, LY6, LC9, LMG, LY5) .
    5. Fig 1: Radiator Vent Inlet Hose
    GM1699347Courtesy of GENERAL MOTORS CORP.
  5. Remove the radiator vent inlet hose (2) from the radiator inlet hose clip (3).
  6. Reposition the radiator vent inlet hose clamp (1) at the air bleed pipe.
  7. Remove the radiator vent inlet hose (2) from the air bleed pipe and reposition.
    8. Fig 2: Radiator Vent Inlet Hose Clamp At Water Pump
    GM1696566Courtesy of GENERAL MOTORS CORP.
  8. Reposition the radiator inlet hose clamp (3) at the water pump.
  9. Remove the radiator inlet hose from the water pump.
    10. Fig 3: Radiator Outlet Hose
    GM1699336Courtesy of GENERAL MOTORS CORP.
  10. Reposition the radiator outlet hose clamp at the water pump.
  11. Remove the radiator outlet hose from the water pump.
  12. Remove the heater hoses. Refer to Heater Inlet Hose Replacement (Non-HP2) and Heater Outlet Hose Replacement (Non-HP2) .
    13. Fig 4: Engine Harness Electrical Connectors And Inlet Hose Clamp
    GM1697098Courtesy of GENERAL MOTORS CORP.
  13. Disconnect the engine harness electrical connector (1) from the oil pressure sensor.
  14. Disconnect the engine harness electrical connector (2) from the lifter oil manifold.
    15. Fig 5: Engine Ground Strap And Bolt
    GM1699550Courtesy of GENERAL MOTORS CORP.
  15. Remove the engine ground strap bolt from the rear of the left cylinder head and cowl and reposition.
    16. Fig 6: Negative Battery Cable Terminal And Stud
    GM1699543Courtesy of GENERAL MOTORS CORP.
  16. Remove the negative battery cable stud (1) from the right cylinder head.
  17. Remove the negative battery cable terminal (2) and the engine harness ground (3) from the right cylinder head.
  18. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
    19. Fig 7: Engine Harness Components
    GM1699536Courtesy of GENERAL MOTORS CORP.
  19. Remove the engine harness clip (1) from the ground stud.
  20. Remove the engine harness ground stud (2) from the engine block.
  21. Remove the engine harness grounds (3) from the engine block.
  22. Disconnect the engine harness electrical connector (4) from the knock sensor.
    23. Fig 8: Transmission Oil Cooler Line Clip And Bolt
    GM1698074Courtesy of GENERAL MOTORS CORP.
  23. Remove the transmission oil cooler line clip bolt from the oil pan, if equipped.
    24. Fig 9: Electrical Connector, Cable Channel Bolt And Pin
    GM1697734Courtesy of GENERAL MOTORS CORP.
  24. Disconnect the engine harness electrical connector (1) from the camshaft position (CMP) sensor wire harness.
  25. Remove the battery cable channel bolt (2).
  26. Slide the channel pin (3) out of the oil pan tab.
    27. Fig 10: Engine Harness Electrical Connectors
    GM1699539Courtesy of GENERAL MOTORS CORP.
  27. Disconnect the engine harness electrical connector (1) from the A/C refrigerant pressure sensor.
  28. Remove the starter motor. Refer to Starter Replacement .
    29. Fig 11: Engine Wiring Harness Electrical Connector And Components
    GM1698087Courtesy of GENERAL MOTORS CORP.
  29. Disconnect the engine harness electrical connector (1) from the crankshaft position (CKP) sensor.
  30. Disconnect the engine harness electrical connector (2) from the knock sensor.
  31. Disconnect the engine harness electrical connector (4) from the oil level sensor.
  32. Remove the engine harness clip (3) from the transmission oil cooler line bracket.
    33. Fig 12: Coolant Heater Cord
    GM1699547Courtesy of GENERAL MOTORS CORP.
  33. Disconnect the coolant heater cord from the coolant heater, if equipped.
  34. Lower the vehicle.
    35. Fig 13: Power Steering Pump And Engine Block Bolt
    GM1699607Courtesy of GENERAL MOTORS CORP.
  35. Remove the rear power steering pump-to-engine block bolt (1500 series shown, 2500 series similar).
    36. Fig 14: Generator Bracket And Bolts
    GM310813Courtesy of GENERAL MOTORS CORP.
  36. Remove the generator bracket bolts.
  37. Position the generator bracket (with power steering pump) aside.
  38. Remove the ignition coil, as required for the proper fit of the J 41798  Engine Lift Bracket before lifting the engine. Refer to Ignition Coil Replacement .
    39. Fig 15: Transmission Oil Level Indicator Tube Nut
    GM1701027Courtesy of GENERAL MOTORS CORP.
  39. Remove the transmission oil level indicator tube nut (1).
    40. Fig 16: Transmission Oil Level Indicator Tube And Seal
    GM396798Courtesy of GENERAL MOTORS CORP.
  40. Remove the transmission oil level indicator tube.
    41. Fig 17: Engine Lift Bracket
    GM309151Courtesy of GENERAL MOTORS CORP.
    CAUTION:

    Refer to Fastener Caution .

  41. Install the J 41798  Engine Lift Bracket to the cylinder heads.

    Tighten 

    • Tighten the M8 engine lift bracket bolts to 25 N.m (18 lb ft).
    • Tighten the M10 engine lift bracket bolts to 50 N.m (37 lb ft).
    42. Fig 18: Engine Mount To Frame Bolts
    GM1701016Courtesy of GENERAL MOTORS CORP.
  42. For 1500 series vehicles with a 4.8L engine, remove the left and right engine mount to frame bolts (1).
    43. Fig 19: Engine Mount And Bolts - Left Side
    GM1701017Courtesy of GENERAL MOTORS CORP.
  43. For 1500 series vehicles with a 5.3L, 6.0L, or 6.2L engines, remove the left and right engine mount to frame bolts (1).
    44. Fig 20: Engine Mount Bracket Bolts
    GM1701018Courtesy of GENERAL MOTORS CORP.
  44. For 2500 series vehicles with a 5.3L, 6.0L, or 6.2L engines, remove the left and right engine mount to engine mount bracket bolts (1).
  45. Raise the vehicle.
    46. Fig 21: Engine Shield And Bolts
    GM1696602Courtesy of GENERAL MOTORS CORP.
  46. Remove the engine shield bolts and shield.
    47. Fig 22: Oil Pan Skid Plate And Bolts
    GM1698082Courtesy of GENERAL MOTORS CORP.
  47. For 1500 series vehicles, remove the oil pan skid plate bolts and plate, if equipped.
    48. Fig 23: Oil Pan Skid Plate And Bolts
    GM1698083Courtesy of GENERAL MOTORS CORP.
  48. For 2500 series vehicles, remove the oil pan skid plate bolts and plate, if equipped.
    49. Fig 24: Oil Pan Drain Plug
    GM1658109Courtesy of GENERAL MOTORS CORP.
  49. Place a suitable drain pan under the oil pan drain plug.
  50. Remove the oil pan drain plug (430).
  51. Allow the oil to drain completely.
  52. Reinstall and tighten the oil pan drain plug.

    Tighten 

    Tighten the drain plug to 25 N.m (18 lb ft).

  53. Remove the catalytic converter. Refer to Catalytic Converter Replacement (with Exhaust Clamp) , or Three-Way Catalytic Converter Replacement
    54. Fig 25: Flywheel And Torque Converter Bolts
    GM1701022Courtesy of GENERAL MOTORS CORP.
  54. Remove the flywheel to torque converter bolts.
    55. Fig 26: Fuel/Evaporative Emission Pipe And Bracket
    GM1701047Courtesy of GENERAL MOTORS CORP.
  55. Remove the fuel/evaporative emission (EVAP) pipe bracket nut from the transmission stud (typical installation shown).
  56. Remove the fuel/EVAP pipe bracket from the stud. Reposition the bracket out of the way.
    57. Fig 27: Transfer Case Vent Hose Bracket
    GM1701049Courtesy of GENERAL MOTORS CORP.
  57. For the 4L80-E automatic transmission, remove the transfer case vent hose bracket (1) nut from the stud, if equipped.
  58. For the 4L60-E/4L70-E/6L80-E automatic transmission, remove the transfer case vent hose bracket (2) nut from the stud, if equipped.
  59. Reposition the transfer case vent hose bracket and hose out of the way, if equipped.
    60. Fig 28: Transmission Bolts/Studs
    GM1701038Courtesy of GENERAL MOTORS CORP.
  60. If equipped with the 4L60-E/4L70-E automatic transmission, remove the transmission bolts/studs.
    61. Fig 29: Automatic Transmission Bolts/Studs
    GM1701039Courtesy of GENERAL MOTORS CORP.
  61. If equipped with the 4L80-E automatic transmission, remove the transmission bolts/studs.
    62. Fig 30: Automatic Transmission Bolts And Studs
    GM1701040Courtesy of GENERAL MOTORS CORP.
  62. If equipped with the 6L80-E automatic transmission, remove the transmission bolts/studs.
  63. Lower the vehicle.
  64. Position and install an engine hoist to the J 41798  Engine Lift Bracket.
  65. Install a floor jack under the transmission for support.
  66. Remove the engine from the vehicle.
  67. Install the J 21366  Converter Holding Strap to the transmission in order to hold the torque converter.
  68. Position and install the engine onto an engine stand.
  69. Remove the engine hoist. from the J 41798  Engine Lift Bracket.
    70. Fig 31: Engine Lift Bracket
    GM309151Courtesy of GENERAL MOTORS CORP.
  70. Remove the J 41798 from the engine.
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