GM Service Manual Online
For 1990-2009 cars only
  1. Install the crankshaft balancer bolt.
  2. Set the pistons 1 and 4 to BDC in direction of engine rotation.

  3. Object Number: 1948709  Size: SH

    Note: Note cylinder sequence.

  4. Mark the connecting rod with the connecting rod bearing cover (1).

  5. Object Number: 2028299  Size: SH
  6. Remove the 4 connecting rod bearing caps bolts (2) of cylinder 1 and 4.
  7. Remove the connecting rod bearing caps (1) and the connecting rod bearing (3).

  8. Object Number: 2028300  Size: SH
  9. Push the pistons 1 and 4 (1) out of the cylinder bore (2).
  10. Note: The shear surfaces of the con-rod and the con-rod bearing cover form a unique fit and must not be swapped or damaged. Do not lay down on the shear surfaces.

  11. Remove the pistons 1 and 4 (1).
  12. Turn crankshaft on crankshaft balancer through 180° in direction of rotation of engine.

  13. Object Number: 1948709  Size: SH

    Note: Note cylinder sequence.

  14. Mark the connecting rod with the connecting rod bearing cover (1).

  15. Object Number: 2028299  Size: SH
  16. Remove the 4 connecting rod bearing caps bolts (2) of cylinder 2 and 3.
  17. Remove the connecting rod bearing caps (1) and the connecting rod bearing (3).

  18. Object Number: 2028301  Size: SH
  19. Push the pistons 2 and 3 (1) out of the cylinder bore (2).
  20. Note: The shear surfaces of the con-rod and the con-rod bearing cover form a unique fit and must not be swapped or damaged. Do not lay down on the shear surfaces.

  21. Remove the pistons 2 and 3 (1).

  22. Object Number: 2028302  Size: SH

    Note: Observe correct fitting position, observe alignment.

  23. Remove the connecting rod bearing (1, 2).
  24. Check the components. Refer to Piston, Connecting Rod, and Bearing Cleaning and Inspection.