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Home >> Pontiac >> 2007 >> Grand Prix GXP >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 3.8L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Engine Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (RPO LS4) or Battery Negative Cable Disconnection and Connection (RPOs L26/L32) in Engine Electrical.
  2. Remove the hood. Refer to Hood Replacement in Body Front End.
  3. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement (L26)  or Fuel Injector Sight Shield Replacement (L32) .
  4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  5. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement .
  6. Drain the cooling system. Refer to Draining and Filling Cooling System (L26, L32 GE 47716 Fill) or Draining and Filling Cooling System (L26, L32 Static Fill) or Draining and Filling Cooling System (LS4 GE 47716 Fill) or Draining and Filling Cooling System (LS4 Static Fill) in Engine Cooling.
  7. Remove the torque converter covers. Refer to Torque Converter Cover Replacement in Automatic Transaxle - 4T65 - E.
    8. Fig 1: View Of Engine Electrical Connectors (Left Side)
    GM911140Courtesy of GENERAL MOTORS CORP.
  8. Remove the engine ground nut (5) and the engine ground wire (6) from the transaxle stud.
  9. Remove the oil level sensor harness retainer bolt.
  10. Remove the oil level harness retainer from the engine.
  11. Disconnect and reposition the electrical connectors from the following components:
    • Vehicle speed sensor (VSS)
    • Oil pressure sensor
    • Oil level sensor (10)
    • Knock sensors
    • Heated oxygen sensor (H02S)
  12. Remove the starter motor. Refer to Starter Motor Replacement (RPO LS4) or Starter Motor Replacement (RPOs L26/L32) in Engine Electrical.
  13. Remove the engine flywheel-to-torque converter bolts. Refer to Flywheel to Torque Converter Bolt Replacement in Automatic Transaxle - 4T65 - E.
  14. Scribe the torque converter to the flywheel for installation.
  15. Remove the transaxle brace. Refer to Automatic Transmission Brace Replacement in Automatic Transaxle - 4T65 - E.
  16. Remove the engine mount lower nuts.
    17. Fig 2: Right Exhaust Manifold & Catalytic Converter Pipe
    GM911163Courtesy of GENERAL MOTORS CORP.
  17. Remove the exhaust manifold pipe stud nuts (2) and reposition the catalytic converter from the exhaust manifold.
  18. Remove the oil filter adapter housing. Refer to Oil Filter Adapter and Bypass Valve Assembly Replacement .
    19. Fig 3: View of Transaxle To Engine Mounting
    GM160965Courtesy of GENERAL MOTORS CORP.
  19. Remove the lower transaxle to the engine bolt (6) and the stud (1).
  20. Lower the vehicle while supporting the transaxle.
  21. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 3.8L.
  22. Disconnect the fuel line from the fuel rail. Refer to Metal Collar Quick Connect Fitting Service in Engine Controls - 3.8L.
  23. Disconnect the fuel vapor line. Refer to Plastic Collar Quick Connect Fitting Service in Engine Controls - 3.8L.
    24. Fig 4: View Of Water Pump Pulley And Bolts
    GM46174Courtesy of GENERAL MOTORS CORP.
  24. Loosen the water pump pulley bolts.
  25. Remove the drive belt. Refer to Drive Belt Replacement (L26)  or Drive Belt Replacement (L32) .
  26. Remove the water pump pulley bolts and the water pump pulley.
  27. Remove the right and the left engine mount struts. Refer to Engine Mount Strut Replacement - Right Side  and Engine Mount Strut Replacement - Left Side .
  28. Remove the engine mount brackets from the radiator support. Refer to Engine Mount Strut Bracket Replacement - Upper Radiator Support .
  29. Disconnect the positive battery cable.
  30. Remove the engine cooling fans. Refer to Fan Shroud Replacement (RPO LS4) or Fan Shroud Replacement (RPOs L26, L32) in Engine Cooling.
  31. Remove the vacuum booster hose from the engine. Refer to Vacuum Brake Booster Check Valve and/or Hose Replacement in Hydraulic Brakes.
  32. Disconnect the A/C vacuum hose from the engine.
    33. Fig 5: View Of Power Steering Pump And Mounting Bolts
    GM282122Courtesy of GENERAL MOTORS CORP.
  33. Remove the power steering pump bolts and pump from the engine. Lay the power steering pump aside.
  34. Disconnect the upper engine electrical connectors from the following components:
    • Electronic Throttle Control (ETC)
    • Fuel injectors
    • EVAP purge solenoid
    • Exhaust gas recirculation (EGR) valve
    • Manifold absolute pressure (MAP) sensor
    • BARO sensor, if equipped
    35. IMPORTANT: Note the position of the engine wiring harness during removal.
  35. Remove upper engine wiring harness from the retaining clips and reposition the engine wiring harness for engine removal.
  36. Remove the radiator inlet hose from the engine. Refer to Radiator Inlet Hose Replacement (RPO LS4) or Radiator Inlet Hose Replacement (RPOs L26, L32) in Engine Cooling.
  37. Remove the radiator outlet hose from the engine. Refer to Radiator Outlet Hose Replacement (RPO LS4) or Radiator Outlet Hose Replacement (RPOs L26, L32) in Engine Cooling.
  38. Remove the heater hoses from the drive belt tensioner. Refer to Heater Inlet Hose Replacement (L26, L32) or Heater Inlet Hose Replacement (RPO LS4) and Heater Hose Replacement - Outlet (L26, L32) or Heater Hose Replacement - Outlet (RPO LS4) in Heating Ventilation and Air Conditioning.
  39. Remove the A/C compressor from the engine. Refer to Compressor Replacement (L26, L32) or Compressor Replacement (LS4) in Heating, Ventilation and Air Conditioning. DO NOT discharge the A/C system. Secure the compressor to the frame.
  40. Install the engine lifting device.
    41. Fig 6: View of Transaxle To Engine Mounting
    GM160965Courtesy of GENERAL MOTORS CORP.
  41. Remove the upper transaxle to the engine bolts (2,3,4,5).
  42. With the aid of an assistant, remove the engine from the vehicle.
  43. Remove the flywheel. Refer to Engine Flywheel Removal .
  44. Install the engine to the engine stand.
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