GM Service Manual Online
For 1990-2009 cars only

Engine Flywheel Removal 7.0L LS7


    Object Number: 1552526  Size: SH

    Important: Note the position and direction of the engine flywheel before removal. The flywheel does not use a locating pin for alignment. Mark or scribe the end of the crankshaft and the flywheel before component removal. Refer to Engine Balancing.

  1. Mark or scribe the end of the crankshaft and the flywheel.

  2. Object Number: 1890317  Size: SH
  3. Remove the flywheel bolts (133).
  4. Remove the flywheel (134).
  5. Remove the flywheel washer (132).

  6. Object Number: 1552475  Size: SH
  7. Note the location of the flywheel balance weights (142), if applicable.

Engine Flywheel Removal 6.2L LS3


    Object Number: 506140  Size: SH

    Important: 

       • For manual transmission applications, note the position and direction of the engine flywheel before removal. The flywheel does not use a locating pin for alignment. Mark or scribe the end of the crankshaft and the flywheel before component removal. The existing manual transmission engine flywheel must be installed to the original position and direction. The engine flywheel will not initially seat against the crankshaft flange, but will be pulled onto the crankshaft by the engine flywheel bolts. This procedure requires a 3 stage tightening process.
       • Do not remove the propeller shaft hub or flex plate from the automatic transmission flex plate assembly. The flex plate assembly, with propeller shaft hub, is balanced as an assembly. If service is required, the entire flex plate assembly should be replaced.

  1. Mark or scribe the end of the crankshaft and the manual transmission flywheel. Refer to Engine Balancing.

  2. Object Number: 156166  Size: SH
  3. Remove the flywheel bolts.
  4. Remove the manual transmission flywheel.

  5. Object Number: 64126  Size: SH
  6. Note the location of the manual transmission flywheel balance weights, if applicable. Refer to Engine Balancing.

  7. Object Number: 64123  Size: SH
  8. Remove the automatic transmission flex plate.

Engine Flywheel Removal 6.2L LS9


    Object Number: 2054031  Size: SH

    Note: Note the position and direction of the engine flywheel before removal. The flywheel does not use a locating pin for alignment. Mark or scribe the end of the crankshaft and the flywheel before component removal. Refer to Engine Balancing.

  1. Mark or scribe the end of the crankshaft and the flywheel.

  2. Object Number: 2054034  Size: SH
  3. Remove the flywheel bolts (1).
  4. Remove the flywheel (2).

  5. Object Number: 2054037  Size: SH
  6. Note the location of the flywheel balance weights (1), if applicable.