GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 2018138  Size: SH
  1. Uniformly loosen and remove the 10 main bearing cap bolts in the sequence shown in the illustration.

  2. Object Number: 2018143  Size: SH

    Note: Insert the bolts into one of the caps. Ease the cap out by gently pulling up and applying force toward the front and back side of the cylinder block, as shown in the illustration.

    Note: 

       • Keep the lower bearing and main bearing cap.
       • Arrange the main bearing caps in the correct order.

  3. Use 2 removed main bearing cap bolts to remove the 5 main bearing caps and 5 lower bearings.
  4. Lift out the crankshaft.

  5. Object Number: 2018145  Size: SH
  6. Remove the upper thrust washers (1) from the cylinder block.

  7. Object Number: 2018147  Size: SH

    Note: Arrange the removed parts in the correct order.

  8. Remove the 5 crankshaft bearings from the cylinder block.

  9. Object Number: 2018151  Size: SH
  10. Remove the 5 crankshaft bearings from the 5 main bearing caps.

  11. Object Number: 2018157  Size: SH
  12. Using a 5 mm hexagon wrench, remove the bolts and oil nozzles (1-4).