For 1990-2009 cars

1. Remove the case fluid passage seal (89).
2. Install a NEW case fluid passage seal (89) into the transmission case assembly.
3. Apply a 3 mm (1/8 in) bead of sealant GM P/N 89020326 (Canadian P/N 89021188) on the inside of the bolt holes of the scaling flange of the torque converter housing assembly.
4. Install the torque converter housing assembly to the transmission case assembly.
5. Apply threadlocker GM P/N 12345382 (Canadian P/N 10953499), to the threads of all the torque converter housing bolts.
6. Install the 12 - M8 x 1.25 x 30 mm bolts (4) and hand tighten.
7. Install the 1 - M8 x 1.25 x 30 mm bolt/studs (3) and hand tighten.
8. Install the 2 - M8 x 1.25 x 35 mm bolts (6) and hand tighten.
9. Install the 1 - M8 x 1.25 x 45 mm bolt (7) and hand tighten.
10. Install the 1 - M8 x 1.25 x 30 mm TORX 40 bolt (8) and hand tighten.

Caution: 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.

11. Tighten the 17 torque converter housing bolts in sequence. Tighten the torque converter housing bolts to 29 N·m (21 lb ft) .