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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Mechanical - 8.1L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Engine Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Identifying Hood Hinge Normal And Service Position Bolt Holes
    GM310799Courtesy of GENERAL MOTORS CORP.
  1. Open the hood.
  2. Place fender covers over both fenders.
  3. 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).
    4. Fig 2: View Of Air Cleaner Outlet Duct
    GM700979Courtesy of GENERAL MOTORS CORP.
  4. Loosen the clamps at the throttle body and air cleaner.
  5. Remove the air cleaner outlet duct.
    6. Fig 3: View Of Battery Cables
    GM662092Courtesy of GENERAL MOTORS CORP.
  6. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (Single Battery) or Battery Negative Cable Disconnect/Connect Procedure (Auxiliary Battery) in Engine Electrical.
  7. Disconnect the positive battery cable.
  8. Remove the ignition coils. Refer to Ignition Coil(s) Replacement in Engine Controls - 8.1 L.
    9. Fig 4: View Of Fuel Feed Pipe & EVAP Canister Purge Pipe
    GM1238587Courtesy of GENERAL MOTORS CORP.
  9. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure in Engine Controls - 8.1 L.
  10. Disconnect the fuel feed pipe (1) from the fuel rail. Refer to Quick Connect Fitting(s) Service (Metal Collar) in Engine Controls - 8.1 L.
  11. Remove the air conditioning (A/C) compressor. Refer to Compressor Replacement (L18) or Compressor Replacement (LR4, LM7, and LQ4) or Compressor Replacement (LLY) in Heating, Ventilation and Air Conditioning.
  12. Remove the radiator. Refer to Radiator Replacement (4.3, 4.8, 5.3, and 6.0L) or Radiator Replacement (Diesel) or Radiator Replacement (8.1L) in Engine Cooling.
    13. Fig 5: View Of TAC Module Electrical Connector
    GM871922Courtesy of GENERAL MOTORS CORP.
  13. Disconnect the throttle actuator control (TAC) module electrical connector (1).
  14. Remove the vacuum lines from the engine, as required.
    15. Fig 6: View Of Ground Cable Bolt At Engine Block
    GM663475Courtesy of GENERAL MOTORS CORP.
  15. Remove the ground cable bolt at the engine block.
  16. Remove the generator. Refer to Generator Replacement (4.8L, 5.3L, and 6.0L Engines) or Generator Replacement (6.6L (LLY) Engine) or Generator Replacement (8.1L Engine) in Engine Electrical.
  17. Remove the engine electrical harness and tie out of the way.
  18. Raise and suitably support the vehicle safety stands. Refer to Lifting and Jacking the Vehicle in General Information.
  19. Remove the starter motor. Refer to Starter Motor Replacement (4.3L Engine) or Starter Motor Replacement (4.8L, 5.3L, and 6.0L Engines) or Starter Motor Replacement (8.1L Engine) or Starter Motor Replacement (6.6L (LLY) Engine) in Engine Electrical.
  20. Remove the hoses from the power steering pump. Refer to Power Steering Cooler Pipe/Hose Replacement (With Hydroboost) or Power Steering Cooler Pipe/Hose Replacement (Without Hydroboost) or Power Steering Cooler Pipe/Hose Replacement (Rack and Pinion) or Power Steering Cooler Pipe/Hose Replacement (Parallel Hybrid Truck) in Power Steering System.
  21. Remove the exhaust manifold pipe. Refer to Exhaust Manifold Pipe Replacement (6.0L, 6.6L, and 8.1L Engines) in Engine Exhaust.
  22. Remove the catalytic converter. Refer to Catalytic Converter Replacement (4.3L, 4.8L, and 5.3L Engines) or Catalytic Converter Replacement (6.0L and 8.1L Engines) or Catalytic Converter Replacement (6.6L Engine) in Engine Exhaust.
    23. Fig 7: Identifying Six Studs & One Bolt Securing Transmission To Engine
    GM394446Courtesy of GENERAL MOTORS CORP.
  23. Remove the torque converter bolts, if equipped.
  24. Remove the clutch pressure plate bolts, if equipped.
  25. Remove the bolts from the transmission to the engine.
  26. Remove the engine oil cooler lines from the engine block. Refer to Engine Oil Cooler Hose/Pipe Replacement (2WD) or Engine Oil Cooler Hose/Pipe Replacement (4WD) in Engine Cooling.
    27. Fig 8: View Of J 36857 At Right Cylinder Head
    GM66457Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  27. Attach J 36857  to the rear of the right cylinder head and to the front of the left cylinder head.
  28. Install the attaching bolt and washer. Use GM P/N 9428217 with GM P/N 15650963.

    Tighten:  Tighten the lift bracket bolts to 40 N.m (30 lb ft).

    29. Fig 9: View Of Engine Mount Heat Shield
    GM750194Courtesy of GENERAL MOTORS CORP.
  29. Remove the engine mount heat shield bolts and shields.
    30. Fig 10: View Of Engine Mount-To-Engine Mount Bracket
    GM750192Courtesy of GENERAL MOTORS CORP.
  30. Remove the engine mount to engine mount bracket bolts.
  31. Remove the engine using a suitable lifting devise.
  32. Install the engine onto a suitable engine stand.
  33. Remove the generator mounting bracket. Refer to Generator Bracket Replacement (4.3L Engine) or Generator Bracket Replacement (4.8L, 5.3L, and 6.0L Engines) or Generator Bracket Replacement (6.6L (LLY) Engine) or Generator Bracket Replacement (8.1L Engine) in Engine Electrical.
    34. Fig 11: View Of A/C Compressor/Power Steering Pump Bracket
    GM746257Courtesy of GENERAL MOTORS CORP.
  34. Remove the A/C compressor/power steering pump bracket from the cylinder head.
  35. Remove the lift brackets from the cylinder head.
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