GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 38122-A Crankshaft Balancer Holder
    • J 45059 Angle Meter

Removal Procedure


    Object Number: 467429  Size: SH
  1. Remove the automatic transmission. Refer to Transmission Replacement .
  2. Install the J 38122-A to the crankshaft balancer in order to keep the flexplate from rotating when removing the flexplate bolts.
  3. Have an assistant hold the J 38122-A with a breaker bar.

  4. Object Number: 1773501  Size: SH

    Important: It may be necessary to remove the chamfer (bevel) from the edge of an 18 mm socket in order to get full socket engagement on the thin headed flexplate bolts.

  5. Remove the flexplate bolts. If reusing the old flexplate discard the flexplate bolts, NEW bolts will need to be installed.
  6. Important: It is not necessary to orientate the flexplate to the crankshaft. It is balanced separately from the engine.

  7. Remove the flexplate.
  8. Clean the thread adhesive from the flywheel bolt holes. Use a nylon bristle brush to clean the holes in the crankshaft.

Installation Procedure


    Object Number: 467429  Size: SH
  1. Install the J 38122-A to the crankshaft balancer in order to keep the flexplate from rotating when tightening the flexplate bolts.

  2. Object Number: 1773501  Size: SH
  3. Install the flexplate.
  4. Have an assistant hold the J 38122-A with a breaker bar.
  5. Notice: Refer to Fastener Notice in the Preface section.

  6. Install the NEW flexplate bolts.
  7. Tighten
    Tighten the bolts to 53 N·m (39 lb ft) plus an additional 25 degrees using J 45059 .

  8. Install the automatic transmission. Refer to Transmission Replacement .