GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1370531  Size: SH
  1. Remove the intake manifold insulator nut.
  2. Remove the intake manifold insulator.

  3. Object Number: 1370536  Size: SH
  4. Remove the right exhaust manifold lower insulator nuts.
  5. Remove the right exhaust manifold lower insulator shield.

  6. Object Number: 945302  Size: SH
  7. Remove the radiator outlet pipe bolts.
  8. Remove the radiator outlet pipe.

  9. Object Number: 945310  Size: SH
  10. Disconnect the battery cable harness from the starter motor.

  11. Object Number: 945316  Size: SH
  12. Remove the engine wiring harness bracket bolt and stud from the lower right side of the engine.

  13. Object Number: 945329  Size: SH
  14. Remove the engine wiring harness bracket bolts from the lower left side of the engine.

  15. Object Number: 945337  Size: SH
  16. Disconnect the engine wiring harness from the top of the left camshaft cover.

  17. Object Number: 945343  Size: SH
  18. Disconnect the engine wiring harness from the front of the left camshaft cover.

  19. Object Number: 945350  Size: SH
  20. Disconnect the engine wiring harness from the A/C compressor.

  21. Object Number: 945358  Size: SH
  22. Disconnect the engine wiring harness from the left camshaft position actuator valves.

  23. Object Number: 945375  Size: SH
  24. Disconnect the engine wiring harness from the left ignition coils.

  25. Object Number: 945380  Size: SH
  26. Disconnect the engine wiring harness from the left knock sensor.

  27. Object Number: 945390  Size: SH
  28. Disconnect the engine wiring harness from the communicator valve.

  29. Object Number: 945276  Size: SH
  30. Disconnect the engine wiring harness from the oil pressure sender.

  31. Object Number: 945400  Size: SH
  32. Disconnect the engine wiring harness from the left oxygen sensor harness.

  33. Object Number: 945408  Size: SH
  34. Disconnect the engine wiring harness from the starter motor solenoid.

  35. Object Number: 945417  Size: SH

    Notice: DO NOT use any mechanical device such as pliers or screwdrivers to disengage the connector. In order to prevent damage to the connector or harness wiring, both of the latches on the connector must be depressed with finger pressure only. When the latches are depressed the connector must then be pulled straight back without pulling on the wires in order to disengage. Failure to follow this procedure can lead to connector or wiring harness damage and failure.

  36. Disconnect the engine wiring harness from the throttle body connector.

  37. Object Number: 945424  Size: SH
  38. Disconnect the engine wiring harness from the engine coolant temperature (ECT) sensor.

  39. Object Number: 945431  Size: SH
  40. Remove the engine wiring harness ground bolt from the left cylinder head.

  41. Object Number: 945434  Size: SH
  42. Disconnect the engine wiring harness from the left camshaft position sensors.

  43. Object Number: 945437  Size: SH
  44. Disconnect the engine wiring harness from the barometric (BARO) sensor.

  45. Object Number: 945439  Size: SH
  46. Disconnect the battery cable harness from the right side of the engine.

  47. Object Number: 945443  Size: SH
  48. Remove the battery cable/generator nut from the generator.
  49. Disconnect the battery cable from the generator.

  50. Object Number: 945449  Size: SH
  51. Remove the battery cable ground bolt from the rear of the right cylinder head.
  52. Remove the battery cable ground.

  53. Object Number: 945720  Size: SH
  54. Disconnect the engine wiring harness from the engine control module (ECM).

  55. Object Number: 945468  Size: SH
  56. Disconnect the engine wiring harness from the crankshaft position sensor.
  57. Remove the engine wiring harness bracket bolt.

  58. Object Number: 945513  Size: SH
  59. Remove the engine wiring harness bracket bolt from the side of the ECM bracket.

  60. Object Number: 945521  Size: SH
  61. Remove the engine wiring harness bracket bolt from the top of the ECM bracket.

  62. Object Number: 945536  Size: SH
  63. Disconnect the engine wiring harness from the top of the right camshaft cover.

  64. Object Number: 945597  Size: SH
  65. Disconnect the engine wiring harness from the left side of the throttle body/intake manifold.

  66. Object Number: 945670  Size: SH
  67. Remove the ECM ground harness terminal screw from the ECM lug.

  68. Object Number: 945682  Size: SH
  69. Disconnect the engine wiring harness from the front of the right camshaft cover.

  70. Object Number: 945689  Size: SH
  71. Disconnect the engine wiring harness from the right camshaft position actuator valves.

  72. Object Number: 945711  Size: SH
  73. Disconnect the engine wiring harness from the right ignition coils.

  74. Object Number: 945733  Size: SH
  75. Disconnect the engine wiring harness from the fuel injector harness.

  76. Object Number: 945738  Size: SH
  77. Disconnect the engine wiring harness from the generator.

  78. Object Number: 945742  Size: SH
  79. Disconnect the engine wiring harness from the right knock sensor.

  80. Object Number: 945748  Size: SH
  81. Disconnect the engine wiring harness from the right oxygen sensor harness.

  82. Object Number: 945766  Size: SH
  83. Disconnect the engine wiring harness from the evaporative emission (EVAP) solenoid.

  84. Object Number: 945769  Size: SH
  85. Remove the engine wiring harness ground bolt from the side of the right cylinder head.

  86. Object Number: 945775  Size: SH
  87. Remove the engine wiring harness ground bolt from the ECM bracket.

  88. Object Number: 945779  Size: SH
  89. Disconnect the engine wiring harness from the right camshaft position sensors.

  90. Object Number: 945788  Size: SH
  91. Remove the engine wiring harness from the engine.

  92. Object Number: 945462  Size: SH
  93. Remove the ECM module bolts.
  94. Remove the ECM module from the ECM bracket.

  95. Object Number: 945456  Size: SH
  96. Remove the ECM bracket bolts.
  97. Remove the ECM bracket.