GM Service Manual Online
For 1990-2009 cars only

Transmission Fluid Filler Tube and Seal Replacement LL8

Removal Procedure


    Object Number: 744648  Size: SH
  1. Remove the filler tube indicator.
  2. Remove the nut (2) securing the filler tube to the exhaust manifold stud (1).

  3. Object Number: 744703  Size: SH
  4. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  5. Position a drain pan under the vehicle.
  6. Remove the filler tube (1) and seal (2) from the vehicle.

Installation Procedure


    Object Number: 744703  Size: SH
  1. Install a new seal (2) into the transmission case.
  2. Install the filler tube (1) into the seal.
  3. Remove the drain pan.
  4. Lower the vehicle.

  5. Object Number: 744648  Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  6. Install the nut (2) securing the filler tube to the exhaust manifold stud (1).
  7. Tighten
    Tighten the nut to 10 N·m (89 lb in).

  8. Install the filler tube indicator.
  9. Fill the transmission to the proper level with DEXRON® III transmission fluid. Refer to Transmission Fluid Check .

Transmission Fluid Filler Tube and Seal Replacement LM4

Removal Procedure

  1. Remove the transmission oil level indicator.
  2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  3. Support the transmission using a suitable jack.
  4. Remove the transmission crossmember. Refer to Transmission Support Replacement .

  5. Object Number: 858550  Size: SH
  6. Loosen the catalytic converter. Refer to Catalytic Converter Replacement .

  7. Object Number: 858553  Size: SH
  8. Lower the transmission slightly.

  9. Object Number: 396797  Size: SH
  10. Remove the indicator tube nut.

  11. Object Number: 396798  Size: SH
  12. Remove the oil level indicator tube.
  13. Remove the seal from the transmission, if necessary.

Installation Procedure


    Object Number: 396798  Size: SH
  1. Install a NEW seal to the indicator tube.
  2. Install the oil level indicator tube.
  3. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 396797  Size: SH
  4. Install the indicator tube nut.
  5. Tighten
    Tighten the nut to 18 N·m (13 lb ft).

  6. Install the catalytic converter. Refer to Catalytic Converter Replacement .
  7. Install the transmission crossmember. Refer to Transmission Support Replacement .
  8. Remove the support from the transmission.
  9. Lower the vehicle.
  10. Install the transmission oil level indicator.
  11. Fill the transmission to the proper level with DEXRON® VI transmission fluid. Refer to Transmission Fluid Check .