GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Impala 🢒 Engine 🢒 Engine Mechanical - 3.4L 🢒 Engine Replacement

Removal Procedure
  1. Disconnect the battery ground (negative) cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Remove the hood. Refer to Hood Replacement in Body Front End.
  3. Remove the cross vehicle brace. Refer to Cross Vehicle Brace Replacement in Body Front End.
  4. Remove the throttle body air inlet duct and the air cleaner assembly. Refer to Air Cleaner Inlet Duct Replacement in Engine Controls - 3.4L.
  5. Remove the engine mount struts. Refer to Engine Mount Strut Replacement - Left Side and Engine Mount Strut Replacement - Right Side .
  6. Remove the drive belt. Refer to Drive Belt Replacement .
  7. Disconnect the electrical harness connectors from the following:
    8. • The oil level sensor
    • The oil pressure switch
    • The engine block heater (if equipped)
    • The knock sensor
    • The heated oxygen sensor (HO2S2)
    • The crankshaft position sensor (24X)
    • The A/C compressor
    • The wiring harness grounds
  8. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  9. Drain the engine coolant from the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
  10. Drain the engine oil.
  11. Remove the oil filter.
  12. Disconnect the electrical harness connectors from the following:
  13. Disconnect the three-way catalytic converter pipe from the right exhaust manifold. Refer to Catalytic Converter Replacement in Engine Exhaust.
  14. Remove the engine mount lower nuts. Refer to Engine Mount Replacement .
  15. Remove the torque converter cover. Refer to Torque Converter Cover Replacement in Automatic Transaxle -- 4T65-E.
  16. Remove the starter motor. Refer to Starter Motor Replacement in Engine Electrical.
  17. Remove the A/C compressor bolts. Reposition and secure the A/C compressor.
  18. Remove the torque converter bolts. Refer to Flywheel to Torque Converter Bolt Replacement in Automatic Transaxle -- 4T65-E.
  19. Remove the right engine splash shield. Refer to Engine Splash Shield Replacement in Body Front End.
  20. Remove the transaxle brace. Refer to Transmission Brace Replacement in Automatic Transaxle -- 4T65-E.

    21. Object Number: 160967 Size: SH
  21. Remove the lower transaxle-to-engine bolt (6) and stud (1).
  22. Disconnect the radiator outlet hose from the engine. Refer to Radiator Outlet Hose Replacement in Engine Cooling.
  23. Lower the vehicle.

    24. Caution: In order to avoid possible injury or vehicle damage, always replace the accelerator control cable with a NEW cable whenever you remove the engine from the vehicle.

    In order to avoid cruise control cable damage, position the cable out of the way while you remove or install the engine. Do not pry or lean against the cruise control cable and do not kink the cable. You must replace a damaged cable.

  24. Disconnect the accelerator control and cruise control servo cable from the throttle body and the cable bracket. Refer to Accelerator Control Cable Replacement in Engine Controls - 3.4L and Cruise Control Cable Replacement in Cruise Control.
  25. Disconnect the vacuum hoses from the upper intake manifold.
  26. Disconnect the power brake booster vacuum hose from the upper intake manifold. Refer to Vacuum Brake Booster Check Valve and/or Hose Replacement in Hydraulic Brakes.
  27. Disconnect the fuel feed and return hoses. Refer to Fuel Hose/Pipes Replacement - Filter to Engine in Engine Controls - 3.4L.
  28. Disconnect the AIR system if equipped. Refer to Secondary AIR Injection Pump Replacement and AIR Check Valve/Pipe Replacement - Bank 2 in Engine Controls - 3.4L.
  29. Remove the power steering pump and reposition.
  30. Disconnect the heater outlet and inlet hoses from the engine. Refer to Heater Hoses Replacement in HVAC.
  31. Disconnect the radiator inlet hose from the engine. Refer to Radiator Inlet Hose Replacement in Engine Cooling.
  32. Suitably support the transaxle with floor stands.
  33. Attach the engine lifting device.
  34. Remove the upper transaxle-to-engine bolts (3, 4 and 5) and stud (2).
  35. Remove the engine from the vehicle.
  36. Remove the flywheel.
  37. Remove the generator and the generator bracket.
  38. Remove the drive belt tensioner.
  39. Remove the ignition control module.

Installation Procedure
  1. Install the ignition control module.
  2. Install the drive belt tensioner.
  3. Install the generator bracket and the generator.
  4. Install the flywheel. Refer to Engine Flywheel Replacement .
  5. Install the engine to the vehicle.

    6. Object Number: 160967 Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  6. Install the upper transaxle-to-engine bolts (3, 4 and 5) and stud (2).

    7. Tighten
    Tighten the upper transaxle-to-engine bolts (3, 4 and 5) and stud (2) to 75 N·m (55 lb ft).

  7. Remove the engine lifting device.
  8. Remove the floor stands from the transaxle.
  9. Install the radiator inlet hose to the engine. Refer to Radiator Inlet Hose Replacement in Engine Cooling.
  10. Connect the heater outlet and inlet hoses to the engine. Refer to Heater Hoses Replacement in HVAC.
  11. Install the power steering pump. Refer to Power Steering Pump Replacement in Power Steering System.
  12. Connect the AIR system if equipped. Refer to AIR Check Valve/Pipe Replacement - Bank 2 and Secondary AIR Injection Pump Replacement in Engine Controls - 3.4L.
  13. Connect the fuel feed and return hoses. Refer to Fuel Hose/Pipes Replacement - Filter to Engine in Engine Controls - 3.4L.
  14. Connect the power brake booster vacuum hose to the upper intake manifold. Refer to Vacuum Brake Booster Check Valve and/or Hose Replacement in Hydraulic Brakes.
  15. Connect the vacuum hoses to the upper intake manifold.

    16. Caution: In order to avoid possible injury or vehicle damage, always replace the accelerator control cable with a NEW cable whenever you remove the engine from the vehicle.

    In order to avoid cruise control cable damage, position the cable out of the way while you remove or install the engine. Do not pry or lean against the cruise control cable and do not kink the cable. You must replace a damaged cable.

  16. Connect the accelerator control and cruise control servo cable to the cable bracket and the throttle body. Refer to Cruise Control Cable Replacement in Cruise Control and Accelerator Control Cable Replacement in Engine Controls - 3.4L.
  17. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  18. Install the radiator outlet hose to the engine. Refer to Radiator Outlet Hose Replacement in Engine Cooling.
  19. Install the lower transaxle-to-engine bolt (6) and stud (1).

    20. Tighten
    Tighten the upper transaxle-to-engine bolt (6) and stud (1) to 75 N·m (55 lb ft).

  20. Install the transaxle brace. Refer to Transmission Brace Replacement in Automatic Transaxle -- 4T65-E.
  21. Install the right engine splash shield. Refer to Engine Splash Shield Replacement in Body Front End.
  22. Install the torque converter bolts. Refer to Flywheel to Torque Converter Bolt Replacement in Automatic Transaxle -- 4T65-E.
  23. Install the A/C compressor. Refer to Air Conditioning Compressor Replacement in HVAC.
  24. Install the starter motor. Refer to Starter Motor Replacement in Engine Electrical.
  25. Install the torque converter cover. Refer to Torque Converter Cover Replacement in Automatic Transaxle -- 4T65-E.
  26. Install the engine mount lower nuts. Refer to Engine Mount Replacement .
  27. Install the three-way catalytic converter pipe to the right exhaust manifold. Refer to Catalytic Converter Replacement in Engine Exhaust.
  28. Install the oil filter.
  29. Connect electrical harness connectors to the following:
    30. • The vehicle speed sensor
    • The oil level sensor
    • The oil pressure switch
    • The engine block heater (if equipped)
    • The knock sensor
    • The heated oxygen sensor (HO2S2)
    • The crankshaft position sensor (24X)
    • The A/C compressor
    • The wiring harness grounds
  30. Lower the vehicle.
  31. Fill with new engine oil. Refer to Refer to Engine Oil and Oil Filter Replacement .
  32. Fill with cooling system with engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
  33. Connect the electrical harness connectors to the following:
    34. • The heated oxygen sensor (HO2S1)
    • The AIR check valve solenoid (if equipped)
    • The Exhaust Gas Recirculation (EGR) valve
    • The Evaporative Emissions Canister Purge Solenoid valve
    • The Throttle Position (TP) sensor
    • The Idle Air Control (IAC) valve
    • The generator
    • The ignition coil
    • The wiring harness grounds
    • The two body wiring harness-to-engine harness connectors
  34. Install the drive belt. Refer to Drive Belt Replacement .
  35. Install the engine mount struts. Refer to Engine Mount Strut Replacement - Left Side and Engine Mount Strut Replacement - Right Side .
  36. Install the throttle body air inlet duct and the air cleaner assembly. Refer to Air Cleaner Inlet Duct Replacement in Engine Controls - 3.4L.
  37. Install the cross vehicle brace. Refer to Cross Vehicle Brace Replacement in Body Front End.
  38. Install the hood. Refer to Hood Replacement in Body Front End.
  39. Connect the battery ground (negative) cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  40. Perform a CKP system variation learn procedure. Refer to CKP System Variation Learn Procedure in Engine Controls 3.4L.