For 1990-2009 cars

1. Remove any sealant and automatic transmission fluid from the contacting surfaces of the transmission case cover and the transmission case.

Note: Do not get any fluid on the contacting surfaces of the transmission case cover or the transmission case.

2. Apply a 3 mm (1/8 in) bead of sealant GM P/N 89020326 (Canadian P/N 89021188), to the transmission case cover.
3. Install the transmission case cover assembly (19) onto the transmission case assembly (17).
4. Apply threadlocker GM P/N 12345382 (Canadian P/N 10953489), to the threads of all the case cover bolts.
5. Install 7 - M8 x 1.25 x 30 mm bolts (20) and hand tighten.
6. Install 1 - M8 x 1.25 x 45 mm bolt (22) and hand tighten.
7. Install 2 - M8 x 1.25 x 48 mm bolts (21) and hand tighten.
8. Install 1 - M8 x 1.25 x 30 mm/M6 x 1.0 x 10 mm double stud (74) and hand tighten.

Note: The length of transmission case cover bolt (77) maybe 78 mm 1st design or 30 mm 2nd design. Do not use the 78 mm bolt in a 2nd design cover.

9. Install 1 - M8 x 1.25 x 78 mm if 1st design or a M8 x 1.25 x 30 mm if 2nd design bolt (77) and hand tighten.

Caution: Refer to Fastener Caution in the Preface section.

10. Install the 12 transmission case cover assembly bolts in sequence and tighten to 25 N·m (18 lb ft).