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Home >> Chevrolet >> 2014 >> Express 1500 LS, AWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 4.8L (L20), 5.3L (LMF), Or 6.0L (L96 LC8) - Repair Instructions - On Vehicle >> Repair Instructions - On Vehicle >> Engine Replacement >> Removal Procedure

Removal Procedure

  1. Remove the engine cover. Refer to Engine Cover Replacement .
  2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  3. Recover the HVAC refrigerant. Refer to Refrigerant Recovery and Recharging .
  4. Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) , Cooling System Draining and Filling (Vac N Fill) .
  5. Remove the sheet metal to radiator support bolts and supports from the vehicle.
  6. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
  7. Remove the coolant reservoir. Refer to Coolant Recovery Reservoir Replacement .
  8. Remove the right and left headlamp capsules. Refer to Headlamp Capsule Replacement (Minus V22) .
  9. Remove the front bumper. Refer to Front Bumper Replacement .
    10. Fig 1: View Of Radiator Inlet Hose
    GM834215Courtesy of GENERAL MOTORS COMPANY
  10. Reposition the radiator inlet hose clamp (4) at the water pump.
  11. Remove the radiator inlet hose from the water pump.
  12. Reposition the radiator outlet hose clamp at the water pump.
  13. Remove the radiator outlet hose from the water pump.
    14. Fig 2: Removing Retaining Ring For The Quick Connect Fitting
    GM104739Courtesy of GENERAL MOTORS COMPANY
  14. Disconnect the transmission cooler lines from the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Replacement (4L60-E/4L65-E/4L70-E) , Transmission Fluid Cooler Hose/Pipe Replacement (6L90 MYD) .
  15. Disconnect the oil cooler line from the radiator, if equipped.
  16. Disconnect the HVAC lines from the condenser.
  17. Disconnect the ground G106 from the right hand inner fender. Refer to Ground Distribution Schematics .
  18. Disconnect the C4 at the underhood fuse block. Refer to Power Distribution Schematics .
  19. Disconnect the positive battery cable from the underhood fuse block and position aside.
    20. Fig 3: Core Support Retaining Bolt
    GM314968Courtesy of GENERAL MOTORS COMPANY
  20. Remove the core support retaining bolt (3).
  21. With the aid of an assistant, remove the core support assembly with the radiator, condenser radiator hoses and fan shroud intact.
  22. Remove the clutch fan. Refer to Fan Clutch Replacement .
  23. Remove the accessory drive belt.
  24. Remove the generator bracket from the engine. Refer to Generator Bracket Replacement (V8) .

    Leave the generator and power steering pump retained to the bracket. Use a suitable strap and position the bracket assembly aside.

    25. Fig 4: View Of Vent Hose
    GM1495928Courtesy of GENERAL MOTORS COMPANY
  25. Remove the radiator vent inlet hose (1) from the throttle body.
    26. Fig 5: View Of battery negative cable lead
    GM1816971Courtesy of GENERAL MOTORS COMPANY
  26. Remove the ground strap from the frame and engine.
    27. Fig 6: View Of battery negative cable lead
    GM1817020Courtesy of GENERAL MOTORS COMPANY
  27. Remove G104 and G105 from the engine. Refer to Ground Distribution Schematics .
  28. Remove the air conditioning compressor. Refer to Air Conditioning Compressor Replacement (4.8L, 5.3L or 6.0L) .
  29. Disconnect the heater hoses from the water pump.
  30. Remove the intake manifold. Refer to Intake Manifold Removal .
  31. Remove the ignition coils from the engine. Refer to Ignition Coil Replacement .
  32. Remove the coolant air bleed pipe from the engine. Refer to Engine Coolant Air Bleed Pipe Replacement (V8) .
  33. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  34. Remove the oil drain plug and drain the oil into a suitable container.
  35. Remove the starter motor. Refer to Starter Replacement (V8) .
  36. Disconnect the catalytic converter pipe from the exhaust manifolds. Refer to Catalytic Converter Replacement (L20, LMF) , Catalytic Converter Replacement (LC8, L96) .
  37. Disconnect the following electrical connectors:
    • The crankshaft position (CKP) sensor
    • The engine oil level sensor
    • The coolant heater, if equipped
    38. Fig 7: View Of battery positive cable
    GM1817770Courtesy of GENERAL MOTORS COMPANY
  38. Unclip the battery positive cable (2) from the harness clip.
  39. Gather all branches of the engine wiring harness and reposition off to the side.
    40. Fig 8: View Of Lower 6 Bell Housing To Engine Studs & Bolts
    GM609370Courtesy of GENERAL MOTORS COMPANY
  40. Remove the lower 6 bell housing to engine studs and bolts. Leave the top 2 studs in place.
    41. Fig 9: Torque Converter Bolts
    GM609366Courtesy of GENERAL MOTORS COMPANY
  41. Remove the torque converter bolts.
  42. Lower the vehicle.
  43. Remove the left and right exhaust manifolds.
    44. CAUTION:

    Refer to Fastener Caution .

  44. Install the J 42451-1  Engine Support Adapter to the cylinder heads. Tighten the M10 engine lift bracket bolts to 50 N.m (37 lb ft).
    45. Fig 10: View Of Engine Mount-To-Engine Mount Bracket
    GM307275Courtesy of GENERAL MOTORS COMPANY
  45. Remove the left and right engine mount-to-engine mount bracket bolts.
    46. Fig 11: View Of Oil Level Indicator Tube Nut
    GM396797Courtesy of GENERAL MOTORS COMPANY
  46. Remove the transmission oil level indicator tube nut.
    47. Fig 12: View Of Oil Level Indicator Tube & Seal
    GM396798Courtesy of GENERAL MOTORS COMPANY
  47. Remove the transmission oil level indicator tube.
    48. Fig 13: Identifying Six Studs & One Bolt Securing Transmission To Engine
    GM394446Courtesy of GENERAL MOTORS COMPANY
  48. Remove the top 2 automatic transmission studs.
  49. Install a floor jack under the transmission for support.
  50. Install an engine hoist to the J 42451-1  Engine Support Adapter.
  51. Separate the engine from the automatic transmission, if equipped.

    Install the J 21366  Converter Holding Strap to the transmission in order to hold the torque converter.

  52. Remove the engine.
  53. Install the engine to an engine stand.
  54. Remove the engine hoist.
  55. Remove the J 42451-1  Engine Support Adapter from the engine.
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