GM Service Manual Online
For 1990-2009 cars only

To overhaul the engine, follow the sequence below.

  1. Draining Fluids and Oil Filter Removal
  2. Engine Flywheel Removal
  3. Drive Belt Tensioner Removal
  4. Engine Mount Strut Bracket Removal (and Rear Engine Lift Bracket)
  5. Engine Mount Strut Bracket Removal (Generator Bracket)
  6. Oil Level Indicator and Tube Removal
  7. Oil Filter Adapter Removal
  8. Intake Manifold Removal (Upper VIN M)
  9. Intake Manifold Removal (Lower)

  10. Engine Coolant Thermostat Removal
  11. Exhaust Crossover Removal
  12. Exhaust Manifold Removal (Left Side VIN M)
  13. Exhaust Manifold Removal (Right Side)
  14. Valve Rocker Arm Cover Removal (Left Side)
  15. Valve Rocker Arm Cover Removal (Right Side)
  16. Valve Rocker Arm and Push Rod Removal
  17. Valve Lifter Removal
  18. Crankshaft Balancer Removal
  19. Water Pump Removal
  20. Oil Pan Removal
  21. Oil Pump Removal
  22. Oil Pump Drive Removal
  23. Crankshaft Front Oil Seal Removal
  24. Engine Front Cover Removal
  25. Timing Chain and Sprockets Removal
  26. Cylinder Head Removal (Left and Right Side)
  27. Camshaft Removal
  28. Piston, Connecting Rod, and Bearing Removal
  29. Crankshaft Rear Oil Seal Removal
  30. Crankshaft and Bearings Removal
  31. Engine Block Disassemble
  32. Engine Block Clean and Inspect
  33. Cylinder Boring and Honing
  34. Engine Block Assemble
  35. Crankshaft and Bearings Clean and Inspect
  36. Crankshaft Balancer Clean and Inspect
  37. Engine Flywheel Clean and Inspect
  38. Piston and Connecting Rod Disassemble
  39. Piston, Connecting Rod, and Bearings Clean and Inspect
  40. Piston Selection
  41. Piston and Connecting Rod Assemble
  42. Camshaft Bearing Removal
  43. Camshaft and Bearings Clean and Inspect
  44. Camshaft Bearing Installation
  45. Timing Chain and Sprockets Clean and Inspect
  46. Valve Lifters Clean and Inspect
  47. Valve Rocker Arm and Push Rods Clean and Inspect
  48. Cylinder Head Disassemble
  49. Cylinder Head Clean and Inspect
  50. Valve Guide Reaming/Valve and Seat Grinding
  51. Cylinder Head Assemble
  52. Oil Pump Disassemble
  53. Oil Pump Clean and Inspect
  54. Oil Pump Assemble
  55. Engine Front Cover Clean and Inspect
  56. Valve Rocker Arm Cover Clean and Inspect
  57. Oil Pan Clean and Inspect
  58. Intake Manifold Clean and Inspect (Upper VIN M)
  59. Intake Manifold Clean and Inspect (Lower)
  60. Exhaust Manifold Clean and Inspect
  61. Water Pump Clean and Inspect
  62. Service Prior to Assembly
  63. Crankshaft and Bearings Installation
  64. Crankshaft Rear Oil Seal Installation
  65. Piston, Connecting Rod, and Bearing Installation
  66. Camshaft Installation
  67. Timing Chain and Sprockets Installation
  68. Engine Front Cover Installation
  69. Crankshaft Front Oil Seal Installation
  70. Oil Pump Drive Installation
  71. Oil Pump Installation
  72. Oil Pan Installation
  73. Cylinder Head Installation (Left and Right Side)
  74. Water Pump Installation
  75. Crankshaft Balancer Installation
  76. Valve Lifter Installation
  77. Valve Rocker Arm and Push Rod Installation
  78. Valve Rocker Arm Cover Installation (Left Side)
  79. Valve Rocker Arm Cover Installation (Right Side)
  80. Exhaust Manifold Installation (Left Side VIN M)
  81. Exhaust Manifold Installation (Right Side)
  82. Exhaust Crossover Installation
  83. Intake Manifold Installation (Lower)
  84. Intake Manifold Installation (Upper VIN M)
  85. Engine Coolant Thermostat Installation
  86. Oil Filter Adapter Installation
  87. Oil Level Indicator and Tube Installation
  88. Engine Mount Strut Bracket Installation (Generator Bracket)
  89. Engine Mount Strut Bracket Installation (and Rear Engine Lift Bracket)
  90. Drive Belt Tensioner Installation
  91. Engine Flywheel Installation