GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 LeSabre 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T65-E 🢒 Automatic Transmission Fluid and Filter Replacement

Removal Procedure

Tools Required:

    • J 6125-1B Slide Hammer
    • J 23129 Axle Boot Remover
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Place the drain pan under the transaxle oil pan.

    3. Notice: When removing the oil pan bolts, be careful not to damage the oil pan sealing surfaces. Such damage may result in oil leaks in this area.


    Object Number: 97331 Size: SH
  3. Remove the oil pan bolts from only the front and the sides.
  4. Loosen the rear oil pan bolts about 4 turns.
  5. Lightly tap the oil pan with a rubber mallet or pry in order to allow the fluid to drain.
  6. Inspect the fluid color.
  7. Remove the remaining oil pan bolts.

    8. Object Number: 97332 Size: SH
  8. Remove the oil pan.

    9. Object Number: 97333 Size: SH
  9. Remove the oil pan gasket.

    10. Object Number: 97334 Size: SH
  10. Remove the oil filter. Use a long screwdriver in order to pry the oil filter neck out of the seal.
  11. Check the oil filter seal for damage or wear.
  12. As needed, remove the seal using the J 6125-1B and the J 23129 .

Installation Procedure

    Object Number: 97334 Size: SH
  1. Install a new seal, as needed. Before installing, coat the new seal with a small amount of TRANSJEL® J 36580 or petroleum jelly.
  2. Install a new filter into the case.

    3. Object Number: 97333 Size: SH
  3. Install the oil pan gasket. Use a new gasket if the sealing ribs are damaged.

    4. Object Number: 97332 Size: SH
  4. Install the oil pan.

    5. Object Number: 97331 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.

  5. Install the oil pan bolts.

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

  6. Lower the vehicle.
  7. Fill the transaxle to the proper level with DEXRON® III fluid or the equivalent.
  8. Check the COLD fluid level reading for the initial fill. Do not overfill.
  9. Inspect the oil pan gasket for leaks.