GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2003 🢒 ION 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - AF23-5 🢒 Transmission Wiring Extension Harness Replacement

Transmission Wiring Extension Harness Replacement for Saturn ION 2003

Removal Procedure
  1. Raise and support the vehicle. Lifting and Jacking the Vehicle in General Information

    2. Object Number: 886301 Size: SH
  2. Remove the control valve body cover (2). Refer to Control Valve Body Cover Replacement .

    3. Object Number: 749337 Size: SH

    Important: DO NOT damage the wiring harness connectors.

  3. Disconnect the 8 solenoid harness connectors.

    4. Object Number: 749339 Size: SH
  4. Remove the fluid temperature sensor bolt (31).
  5. Remove the fluid temperature sensor clamp (49).

  6. Remove the fluid temperature sensor (36) and O-ring (32).


    Object Number: 866191 Size: SH
  7. Disconnect the shift cable from the transmission control lever.

    8. Object Number: 880085 Size: SH
  8. Remove the transmission control lever (2) and nut.

    9. Object Number: 749329 Size: SH
  9. Remove the park/neutral position switch bolt (79).

    10. Object Number: 749341 Size: SH
  10. With a twisting motion, remove the complete wiring harness assembly.

Installation Procedure

    Object Number: 874478 Size: SH
  1. Apply automatic transmission fluid to a new transmission wiring connector O-ring seal (46).
  2. Install the new transmission wiring connector O-ring seal (46) onto the transmission wiring harness assembly (33).
  3. Install the transmission wiring harness assembly (33) into the transmission case assembly through the wiring harness bore.

    4. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 749329 Size: SH
  4. Install the park/neutral position switch bolt (79).

    5. Tighten
    Tighten the bolt to 25 N·m (18 lb ft).


    Object Number: 880085 Size: SH
  5. Install the transmission control lever (2) and the nut (1).

    6. Tighten
    Tighten the nut to 16 N·m (12 lb ft).


    Object Number: 866191 Size: SH
  6. Install the shift cable to the transmission control lever.

    7. Important: Apply transaxle fluid to the new fluid temperature sensor O-ring.

  7. Install the temperature fluid sensor (36) into the valve body.
  8. Install the fluid temperature sensor clamp (49).

    9. Object Number: 749339 Size: SH
  9. Install the fluid temperature sensor bolt (31).

    10. Tighten
    Tighten the bolt to 10 N·m (89 lb in).

  10. Install a new O-ring (32) into the groove of the transaxle fluid temperature sensor (36).
  11. Connect the fluid temperature sensor harness connector.

    12. Object Number: 886301 Size: SH
  12. Install the control valve body cover (2). Refer to Control Valve Body Cover Replacement .
  13. Lower the vehicle.

    14. Important: Do not use AF P/N 21005966 or P/N 21019223, these fluids are not compatible with this transaxle. Use Saturn T-IV P/N 22689186.

  14. Add fluid to the transaxle as necessary. Refer to Transmission Fluid Check .
  15. Start the engine a check for leaks.