GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1552966  Size: SH
  1. Inspect the input speed sensor (ISS) assembly (250) for the following conditions:
  2. • Cracked or damaged housing
    • Worn or missing harness brackets
    • Damaged or worn wining or electrical connector
    • Loose, missing or damaged mounting bolt insert

    Object Number: 1552967  Size: SH
  3. Remove the input speed sensor (ISS) O-ring (249) and discard.
  4. Lubricate NEW O-ring (249) with transmission fluid and position in the ISS O-ring groove.
  5. Insert the ISS (250) into oil pump ISS bore and fully seat.
  6. Align ISS bolt insert with oil pump mounting bolt hole.
  7. Notice: Refer to Fastener Notice in the Preface section.

  8. Install retaining bolt (247).
  9. Tighten
    Tighten the retaining bolt to 9-11 N·m (6.6-8.1 lb ft).


    Object Number: 1552968  Size: SH
  10. Route the ISS assembly (250) wire harness as shown. Install harness bracket #1 and #2 in the locations shown. Ensure the wire harness lays flat against the pump housing.