For 1990-2009 cars

1. Clean any gasket material from the control valve body cover and inspect the gasket mounting surface.
2. Apply a 3 mm (1/8 in) bead of sealant GM P/N 89020326 (Canadian P/N 89021188), to the cover mounting surface.
3. Install the control valve body cover (29) onto the transmission case assembly.
4. Apply threadlocker GM P/N 12345382 (Canadian P/N 10953489), to the threads of all of the cover bolts.
5. Install the 9 - M8 x 1.25 x 15.5 mm control valve body cover bolts (28).

Caution: Refer to Fastener Caution in the Preface section.

6. Install the 9 control valve body cover bolts, in sequence, and tighten to 13 N·m (10 lb ft).