GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Vauxhall 🢒 2009 🢒 VXR8 🢒 Engine 🢒 Engine Mechanical - 2.8L, 3.0L, 3.2L, or 3.6L 🢒 Engine Wiring Harness Assembly Removal
  1. Remove the engine covers. Refer to Engine Cover Replacement .

    2. Object Number: 1958724 Size: SH
  2. Disconnect the right camshaft position sensors electrical connectors (1).

    3. Important: LE0 and LW2 engines only have an intake camshaft position actuator valve.

  3. Disconnect the right bank intake and exhaust camshaft position actuator valve electrical connectors (5).
  4. Detach the engine wiring harness to cylinder head retaining lug (3).

    5. Important: Use a suitable tool to detach the engine wiring harness bracket (2) from the locating clip lug on the right bank camshaft cover (4) then slide the engine wiring harness bracket (2) upwards to detach from the right bank camshaft cover (4).

  5. Detach the engine wiring harness bracket (2) from the right bank camshaft cover (4).

    6. Object Number: 1958725 Size: SH
  6. Remove the engine wiring harness ground to right bank cylinder head front retaining bolt (1).
  7. Remove the engine wiring harness bracket to right bank cylinder head retaining bolt (2).
  8. Remove the engine wiring harness bracket to cylinder block retaining bolt (3).

    9. Object Number: 1958728 Size: SH
  9. Remove the battery positive cable to alternator retaining nut (1).
  10. Disconnect the battery positive cable (2) from the alternator (3).
  11. Disconnect the alternator battery harness connector (4).
  12. Remove the alternator and mounting bracket. Refer to Generator Removal .

    13. Object Number: 1958730 Size: SH
  13. Disconnect the right bank knock sensor electrical connector (2).
  14. Disconnect the crankshaft position sensor electrical connector (1).

    15. Object Number: 1958732 Size: SH
  15. Disconnect the right bank ignition coil electrical connectors (2).
  16. Remove the engine wiring harness ground to right bank cylinder head rear retaining bolt (4).

    17. Important: Use a suitable tool to detach the engine wiring harness (1) clips from the right bank camshaft cover (4).

  17. Detach the engine wiring harness (1) from the right bank camshaft cover (3).

    18. Object Number: 1958733 Size: SH

    Important: Steps 19 - 22 refer to the 4L60E 4 speed automatic transmission only

  18. Disconnect the right hand Heated Oxygen Sensor 1 electrical connector (2) if still connected after engine removal.
  19. Disconnect the main transmission electrical connector (3).
  20. Disconnect the vehicle speed sensor electrical connector (4)
  21. Disconnect the park/neutral switch electrical connector (1).

    22. Object Number: 1958735 Size: SH

    Important: Steps 24 and 25 refer to the 5L40E 5 speed automatic transmission only.

  22. Disconnect the right hand Heated Oxygen Sensor 1 electrical connector (1) if still connected after engine removal.
  23. Disconnect the main transmission electrical connector (2).

    24. Object Number: 1958736 Size: SH

    Important: Steps 27 and 28 refer to the D173 6 speed manual transmission only.

  24. Disconnect the right hand Heated Oxygen Sensor 1 electrical connector (1) if still connected after engine removal.
  25. Disconnect the reverse switch assembly electrical connector (2).

    26. Object Number: 1958738 Size: SH
  26. Disconnect the left hand Heated Oxygen Sensor 1 electrical connector (3) if still connected after engine removal.
  27. Detach the left hand Heated Oxygen Sensor 1 electrical harness (1) from the engine wiring harness bracket (2).

    28. Object Number: 1958739 Size: SH
  28. Remove the engine wiring harness bracket to cylinder head rear retaining bolts (1). 

    29. Object Number: 1958741 Size: SH
  29. Disconnect the Intake Manifold Runner Control (IMRC) electrical connector (1).
  30. Disconnect the injector harness electrical connector (2).
  31. Disconnect the purge solenoid electrical connector (3).

    32. Object Number: 1958742 Size: SH
  32. Remove the engine cover bracket to cylinder head retaining bolt (2). 
  33. Remove the engine cover bracket (1). 

    34. Object Number: 1958745 Size: SH
  34. Disconnect the left bank ignition coil electrical connectors (2).
  35. Remove the engine wiring harness ground to left bank cylinder head retaining bolt (5).
  36. Disconnect the coolant temperature sensor electrical connector (6).
  37. Disconnect the oil pressure sensor electrical connector (7).

    38. Important: Use a suitable tool to detach the engine wiring harness (1) clips from the right bank camshaft cover clips (4) then lift upwards to detach the engine wiring harness (1) from the right bank camshaft cover lugs (3).

  38. Detach the engine wiring harness bracket (1) from the right bank camshaft cover lugs (3) and position aside.

    39. Object Number: 1958744 Size: SH
  39. Disconnect the starter motor electrical connector (1).

    40. Object Number: 1958752 Size: SH
  40. Disconnect the battery positive cable (2) from the starter motor (3).
  41. Remove the battery positive cable to starter motor terminal retaining nut (1).

    42. Object Number: 1958755 Size: SH
  42. Disconnect the left bank knock sensor electrical connector (1).
  43. Disconnect the oil level sensor electrical connector (2).
  44. Detach the engine wiring harness to cylinder block retaining lug (3).

    45. Object Number: 1957879 Size: SH
  45. Disconnect the A/C pressure transducer electrical connector (1).

    46. Object Number: 1957863 Size: SH
  46. Disconnect the A/C compressor electrical connector (1).

    47. Object Number: 1958756 Size: SH

    Important: DO NOT disconnect the power steering pipes or drain the power steering fluid.

    Important: The locking tang on the power steering reservoir bracket (2) must be released before removing the power steering reservoir (1). Release the locking tang on the power steering reservoir bracket  (2) with a suitable tool.

  47. Separate power steering fluid reservoir (1) from the power steering fluid reservoir bracket (2).
  48. Reposition and secure the power steering fluid reservoir away from the power steering fluid reservoir (1) bracket (2).

    49. Object Number: 1958758 Size: SH
  49. Remove the power steering fluid reservoir bracket to engine front cover retaining bolts (2).
  50. Remove the power steering fluid reservoir bracket (1).

    51. Object Number: 1958760 Size: SH
  51. Disconnect the left camshaft position sensors electrical connectors (4).

    52. Important: LE0 and LW2 engines only have an intake camshaft position actuator valve.

  52. Disconnect the left bank intake and exhaust camshaft position actuator valve electrical connectors (5).
  53. Disconnect the throttle position sensor electrical connector (1).

    54. Important: Use a suitable tool to detach the engine wiring harness bracket (2) from the locating clip lug on the left bank camshaft cover (3) then slide the engine wiring harness bracket (2) upwards to detach from the left bank camshaft cover (3).

  54. Detach the engine wiring harness bracket (2) from the left bank camshaft cover (3).

    55. Object Number: 1958762 Size: SH
  55. Remove the engine wiring harness (1).