GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • J 37096 Flywheel Holder
    • J 25033-C Pulley Installer
    • J 25034-C Pulley Remover

Removal Procedure


    Object Number: 1583634  Size: SH
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
  2. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement.
  3. Remove the hood. Refer to Hood Replacement.
  4. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement.
  5. Remove the engine mount snubber and drive belt. Refer to Drive Belt Replacement.
  6. Drain the cooling system. Refer to Cooling System Draining and Filling.
  7. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement.
  8. Remove the starter motor. Refer to Starter Motor Replacement.
  9. Remove the oil pressure sensor heat shield nuts and shield.

  10. Object Number: 1774868  Size: SH
  11. Disconnect the engine wiring harness electrical connector (1) from the oil pressure sensor.
  12. Disconnect the engine wiring harness electrical connector (2) from the knock sensor.

  13. Object Number: 1777686  Size: SH
  14. Remove the engine wiring harness ground bolt (1).
  15. Separate the engine wiring harness ground terminal (2) from the engine boss.

  16. Object Number: 1777649  Size: SH
  17. Remove the engine wiring harness clip (1) from the air conditioning (A/C) compressor bracket.
  18. Remove the engine wiring harness clip bolt (3).
  19. Separate the engine wiring harness clip (2) from the engine boss.

  20. Object Number: 1777176  Size: SH
  21. Disconnect the engine wiring harness electrical connector from the A/C compressor.

  22. Object Number: 1777682  Size: SH
  23. Remove the connector position assurance (CPA) retainer (3).
  24. Disconnect the lower front heated oxygen sensor (HO2S) electrical connector from the engine wiring harness electrical connector (1).
  25. Remove the engine wiring harness electrical connector clip (2) from the thermostat housing stud.

  26. Object Number: 1777677  Size: SH
  27. Remove the lower rear CPA retainer (1).
  28. Disconnect the lower rear HO2S electrical connector from the engine wiring harness electrical connector (2).
  29. Remove the engine wiring harness electrical connector (2) rosebud from the transaxle mount.

  30. Object Number: 1777192  Size: SH
  31. Disconnect the engine wiring harness electrical connector (1) from the knock sensor.
  32. Disconnect the engine wiring harness electrical connector (2) from the crankshaft position (CKP) sensor.

  33. Object Number: 1777653  Size: SH
  34. Remove the engine wiring harness clip (1) from the engine stud.
  35. Lower the vehicle.

  36. Object Number: 1777753  Size: SH
  37. Using the J 25034-C , remove the power steering pump pulley.

  38. Object Number: 1777755  Size: SH
  39. Remove the power steering pump bolts (3).
  40. Remove the power steering line clip bolt (1) from the generator stud.
  41. Remover the power steering line clip (2) from the stud.
  42. Reposition and secure the power steering pump assembly out of the way.

  43. Object Number: 1774876  Size: SH
  44. Disconnect the engine wiring harness electrical connector (1) from the evaporative emission (EVAP) canister purge solenoid.
  45. Disconnect the engine wiring harness electrical connector (2) from the electronic throttle control (ETC).
  46. Remove the CPA retainer (5).
  47. Disconnect the engine wiring harness electrical connector (4) from the HO2S.

  48. Object Number: 1777647  Size: SH
  49. Disconnect the engine wiring harness clips (1, 2) from the heater inlet and outlet pipe brackets.
  50. Disconnect the engine wiring harness clip (3) from the engine lift bracket.

  51. Object Number: 1774993  Size: SH
  52. Disconnect the engine wiring harness electrical connector (1) from the manifold absolute pressure (MAP) sensor.
  53. Disconnect the engine wiring harness electrical connector (2) from the ignition control module.

  54. Object Number: 1777179  Size: SH
  55. Remove the CPA retainer (3).
  56. Disconnect the engine wiring harness electrical connector (2) from the rear upper HO2S.

  57. Object Number: 1777644  Size: SH
  58. Remove the engine wiring harness clips (1, 2) from the ignition control module bracket.

  59. Object Number: 1777669  Size: SH
  60. Reposition the engine wiring harness terminal boot (4).
  61. Remove the engine wiring harness to generator stud nut (1).
  62. Remove the engine wiring harness terminal (2) from the generator.
  63. Disconnect the engine wiring harness electrical connector (3) from the generator.

  64. Object Number: 1777208  Size: SH
  65. Disconnect the engine wiring harness electrical connector (2) from the fuel injector inline electrical connector.

  66. Object Number: 1777177  Size: SH
  67. Remove the engine wiring harness bolt (1).
  68. Disconnect the engine wiring harness electrical connector (2) from the camshaft phasor.
  69. Remove the engine wiring harness clip (3) from the engine.

  70. Object Number: 1777193  Size: SH
  71. Disconnect the engine wiring harness electrical connector (1) from the body wiring harness electrical connector (2).

  72. Object Number: 1777200  Size: SH
  73. Disconnect the engine wiring harness electrical connector (3) from the body wiring harness electrical connector (2).

  74. Object Number: 1583653  Size: SH
  75. Disconnect the body harness electrical connector from the powertrain control module (PCM).

  76. Object Number: 1777201  Size: SH
  77. Disconnect the engine wiring harness electrical connector (1) from the PCM.

  78. Object Number: 1583656  Size: SH
  79. Disconnect the engine wiring harness electrical connector from the transmission control module (TCM).

  80. Object Number: 1777674  Size: SH
  81. Disconnect the engine wiring harness electrical connector from the vehicle speed sensor.

  82. Object Number: 1777656  Size: SH
  83. Remove the engine wiring harness clip from the vehicle speed sensor bracket.

  84. Object Number: 1777660  Size: SH
  85. Disconnect the engine wiring harness electrical connector (1) from the neutral safety backup switch.

  86. Object Number: 1777665  Size: SH
  87. Disconnect the engine wiring harness electrical connector (1) from the transaxle.

  88. Object Number: 1775661  Size: SH
  89. Remove the engine wiring harness clip bolt (4).
  90. Remove the engine wiring harness clip nut (5).
  91. Remove the engine wiring harness clip (6) from the transaxle stud.

  92. Object Number: 1775665  Size: SH
  93. Remove the engine wiring harness ground nut (3).
  94. Remove the engine wiring harness ground terminal (2) and the battery cable ground terminal (1) from the transaxle stud.
  95. Gather all branches of the engine wiring harness and reposition the harness out of the way.
  96. Remove the catalytic converter. Refer to Catalytic Converter Replacement - Left Side and/or Catalytic Converter Replacement - Right Side.
  97. Remove the engine mount. Refer to Engine Mount Replacement.

  98. Object Number: 1777202  Size: SH
  99. Remove the torque converter cover bolts and cover.

  100. Object Number: 475919  Size: SH
  101. Remove the flexplate to torque converter bolts.

  102. Object Number: 1777431  Size: SH
  103. Unbolt and reposition the A/C compressor off to the side. DO NOT discharge the A/C system.

  104. Object Number: 1725337  Size: SH
  105. Remove the transaxle brace bolts and brace.

  106. Object Number: 1583645  Size: SH
  107. Reposition the radiator outlet hose clamp at the thermostat housing.
  108. Remove the radiator outlet hose from the thermostat housing.
  109. Lower the vehicle and support the transaxle.

  110. Object Number: 1774996  Size: SH
  111. Reposition the radiator surge tank hose clamp (1) at the surge tank pipe.
  112. Remove the radiator surge tank hose from the surge tank pipe.

  113. Object Number: 1774992  Size: SH
  114. Reposition the brake booster vacuum hose clamp (2) at the intake manifold.
  115. Remove the brake booster vacuum hose (1) from the intake manifold.

  116. Object Number: 1777448  Size: SH
  117. Reposition the heater inlet (1) and outlet (2) hose clamps at the engine.
  118. Remove the heater outlet and inlet hoses from the engine.

  119. Object Number: 1774990  Size: SH
  120. Disengage the fuel/EVAP line clip (1) from the MAP sensor bracket.
  121. Disconnect the fuel feed line quick connect fitting (3) from the fuel rail. Refer to Metal Collar Quick Connect Fitting Service.
  122. Disconnect the EVAP purge line quick connect fitting (2) from the canister purge solenoid. Refer to Plastic Collar Quick Connect Fitting Service.

  123. Object Number: 1583647  Size: SH
  124. Reposition the radiator inlet hose clamp at the engine.
  125. Remove the radiator inlet hose from the engine.
  126. Install a engine lifting device to the engine.

  127. Object Number: 1777197  Size: SH
  128. Remove the transaxle-to-engine bolts/studs.
  129. Separate the engine from the transaxle and remove the engine from the vehicle.

  130. Object Number: 309963  Size: SH
  131. Using the J 37096 , secure the flexplate in order to prevent the flexplate from rotating.

  132. Object Number: 1526753  Size: SH
  133. Loosen the flexplate bolts.
  134. Remove 5 of the 6 flexplate bolts leaving one bolt at the top of the crankshaft.
  135. Grip the flexplate and remove the remaining bolt. Do not drop the flexplate when removing the final bolt.
  136. Remove the flexplate.
  137. Install the engine to the engine stand.

Installation Procedure


    Object Number: 1526753  Size: SH
  1. Install a engine lifting device to the engine.
  2. Remove the engine from the engine stand.
  3. Position the flexplate to the crankshaft.
  4. Install the flywheel bolts finger tight.
  5. Install the J 37096 to the flexplate in order to prevent the flexplate from rotating.
  6. Caution: Refer to Fastener Caution in the Preface section.

  7. Tighten the flexplate bolts to 70 N·m (52 lb ft).

  8. Object Number: 309963  Size: SH
  9. Remove the J 37096 .

  10. Object Number: 1777197  Size: SH
  11. Install the engine to the vehicle and install the engine to the transaxle.
  12. Install the transaxle-to-engine bolts/studs and tighten to 75 N·m (55 lb ft).

  13. Object Number: 1583647  Size: SH
  14. Install the radiator inlet hose to the engine.
  15. Position the radiator inlet hose clamp at the engine.

  16. Object Number: 1774990  Size: SH
  17. Connect the EVAP purge line quick connect fitting (2) to the canister purge solenoid. Refer to Plastic Collar Quick Connect Fitting Service.
  18. Connect the fuel feed line quick connect fitting (3) to the fuel rail. Refer to Metal Collar Quick Connect Fitting Service.
  19. Engage the fuel/EVAP line clip (1) to the MAP sensor bracket.

  20. Object Number: 1777448  Size: SH
  21. Install the heater outlet and inlet hoses to the engine.
  22. Position the heater inlet(1) and outlet (2) hose clamps at the engine.

  23. Object Number: 1774992  Size: SH
  24. Install the brake booster vacuum hose (1) to the intake manifold.
  25. Position the brake booster vacuum hose clamp (2) at the intake manifold.

  26. Object Number: 1774996  Size: SH
  27. Install the radiator surge tank hose to the surge tank pipe.
  28. Position the radiator surge tank hose clamp (1) at the surge tank pipe.
  29. Remove the support from the transaxle and raise the vehicle.

  30. Object Number: 1583645  Size: SH
  31. Install the radiator outlet hose to the thermostat housing.
  32. Position the radiator outlet hose clamp at the thermostat housing.

  33. Object Number: 1725337  Size: SH
  34. Install the transaxle brace and bolts and tighten the bolts to 50 N·m (37 lb ft).

  35. Object Number: 1777431  Size: SH
  36. Position and install the A/C compressor onto the stud.
  37. Tighten the A/C compressor nut first, then the rear bolt, then the front bolt to 50 N·m (37 lb ft).

  38. Object Number: 475919  Size: SH
  39. Install the flexplate to torque converter bolts and tighten to 62 N·m (46 lb ft.

  40. Object Number: 1777202  Size: SH
  41. Install the torque converter cover and bolts and tighten to 10 N·m (89 lb in).
  42. Install the catalytic converter. Refer to Catalytic Converter Replacement - Left Side and/or Catalytic Converter Replacement - Right Side.
  43. Install the engine mount. Refer to Engine Mount Replacement.

  44. Object Number: 1775665  Size: SH
  45. Position the branches of the engine wiring harness over the engine.
  46. Install the battery cable ground terminal (1) and the engine wiring harness ground terminal (2) to the transaxle stud.
  47. Install the engine wiring harness ground nut (3) and tighten to 25 N·m (18 lb ft.

  48. Object Number: 1775661  Size: SH
  49. Install the engine wiring harness clip (6) to the transaxle stud.
  50. Install the engine wiring harness clip nut (5) and tighten to 25 N·m (18 lb ft).
  51. Install the engine wiring harness clip bolt (4) and tighten to 25 N·m (18 lb ft).

  52. Object Number: 1777665  Size: SH
  53. Connect the engine wiring harness electrical connector (1) to the transaxle.

  54. Object Number: 1777660  Size: SH
  55. Connect the engine wiring harness electrical connector (1) to the neutral safety backup switch.

  56. Object Number: 1777656  Size: SH
  57. Install the engine wiring harness clip to the vehicle speed sensor bracket.

  58. Object Number: 1777674  Size: SH
  59. Connect the engine wiring harness electrical connector to the vehicle speed sensor.

  60. Object Number: 1583656  Size: SH
  61. Connect the engine wiring harness electrical connector to the TCM.

  62. Object Number: 1777201  Size: SH
  63. Connect the engine wiring harness electrical connector (1) to the PCM.

  64. Object Number: 1583653  Size: SH
  65. Connect the body harness electrical connector to the PCM.

  66. Object Number: 1777200  Size: SH
  67. Connect the engine wiring harness electrical connector (3) to the body wiring harness electrical connector (2).

  68. Object Number: 1777193  Size: SH
  69. Connect the engine wiring harness electrical connector (1) to the body wiring harness electrical connector (2).

  70. Object Number: 1777177  Size: SH
  71. Install the engine wiring harness clip (3) to the engine.
  72. Connect the engine wiring harness electrical connector (2) to the camshaft phasor.
  73. Install the engine wiring harness bolt (1) and tighten to 10 N·m (89 lb in).

  74. Object Number: 1777208  Size: SH
  75. Connect the engine wiring harness electrical connector (2) to the fuel injector inline electrical connector.

  76. Object Number: 1777669  Size: SH
  77. Connect the engine wiring harness electrical connector (3) to the generator.
  78. Install the engine wiring harness terminal (2) to the generator.
  79. Install the engine wiring harness to generator stud nut (1) and tighten to 20 N·m (15 lb ft).
  80. Position the engine wiring harness terminal boot (4).

  81. Object Number: 1777644  Size: SH
  82. Install the engine wiring harness clips (1, 2) to the ignition control module bracket.

  83. Object Number: 1777179  Size: SH
  84. Connect the engine wiring harness electrical connector (2) to the rear upper HO2S.
  85. Install the CPA retainer (3).

  86. Object Number: 1774993  Size: SH
  87. Connect the engine wiring harness electrical connector (2) to the ignition control module.
  88. Connect the engine wiring harness electrical connector (1) to the MAP sensor.

  89. Object Number: 1777647  Size: SH
  90. Connect the engine wiring harness clip (3) to the engine lift bracket.
  91. Connect the engine wiring harness clips (1, 2) to the heater inlet and outlet pipe brackets.

  92. Object Number: 1774876  Size: SH
  93. Connect the engine wiring harness electrical connector (4) to the HO2S.
  94. Install the CPA retainer (5).
  95. Connect the engine wiring harness electrical connector (2) to the ETC.
  96. Connect the engine wiring harness electrical connector (1) to the EVAP canister purge solenoid.

  97. Object Number: 1777755  Size: SH
  98. Unsecure and position the power steering pump.
  99. Install the power steering line clip (2) to the stud.
  100. Install the power steering line clip nut (1) to the generator stud and tighten the nut to 5 N·m (44 lb in).
  101. Install the power steering pump bolts (3) and tighten to 25 N·m (18 lb ft).

  102. Object Number: 1777753  Size: SH
  103. Using the J 25033-C , install the power steering pump pulley (1).

  104. Object Number: 1777192  Size: SH
  105. Connect the engine wiring harness electrical connector (2) to the CKP sensor.
  106. Connect the engine wiring harness electrical connector (1) to the knock sensor.

  107. Object Number: 1777677  Size: SH
  108. Install the engine wiring harness electrical connector (2) rosebud to the transaxle mount.
  109. Connect the lower rear HO2S electrical connector to the engine wiring harness electrical connector (2).
  110. Install the lower rear CPA retainer (1).

  111. Object Number: 1777682  Size: SH
  112. Install the engine wiring harness electrical connector clip (2) to the thermostat housing stud.
  113. Connect the lower front HO2S electrical connector to the engine wiring harness electrical connector (1).
  114. Install the CPA retainer (3).

  115. Object Number: 1777176  Size: SH
  116. Connect the engine wiring harness electrical connector to the A/C compressor.

  117. Object Number: 1777649  Size: SH
  118. Install the engine wiring harness clip (2) to the engine boss.
  119. Install the engine wiring harness clip bolt (3) and tighten to 25 N·m (18 lb ft).
  120. Install the engine wiring harness clip (1) to the A/C compressor bracket.

  121. Object Number: 1777686  Size: SH
  122. Install the engine wiring harness ground terminal (2) to the engine boss.
  123. Install the engine wiring harness ground bolt (1) and tighten to 25 N·m (18 lb ft).

  124. Object Number: 1774868  Size: SH
  125. Connect the engine wiring harness electrical connector (2) to the knock sensor.
  126. Connect the engine wiring harness electrical connector (1) to the oil pressure sensor.

  127. Object Number: 1583634  Size: SH
  128. Install the oil pressure sensor heat shield and nuts and tighten to 10 N·m (89 lb in).
  129. Install the starter motor. Refer to Starter Motor Replacement.
  130. Install the drive belt and the engine mount snubber. Refer to Drive Belt Replacement.
  131. Install the intake manifold cover. Refer to Intake Manifold Cover Replacement.
  132. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement.
  133. Install the hood. Refer to Hood Replacement.
  134. Fill the cooling system. Refer to Cooling System Draining and Filling.
  135. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
  136. Prelube the engine. Refer to Engine Prelubing.
  137. Perform the CKP system variation learn procedure. Refer to Crankshaft Position System Variation Learn.
  138. Note: After an overhaul the engine should be tested. Use the following procedure after the engine is installed in the vehicle.

    95.1. Disable the ignition system.
    95.2. Crank the engine several times. Listen for any unusual noises or evidence that parts are binding.
    95.3. Enable the ignition system.
    95.4. Start the engine and listen for unusual noises.
    95.5. Check the vehicle oil pressure gage or light and confirm that the engine has acceptable oil pressure.
    95.6. Run the engine speed at about 1,000 RPM until the engine has reached normal operating temperature.
    95.7. Listen for sticking lifters or other unusual noises.
    95.8. Inspect for fuel, oil, and/or coolant leaks while the engine is running.
    95.9. Perform a final inspection for the proper oil and coolant levels.
  139. Close the hood.