CTS RWD V6-3.6L (2008)
5. Position the vacuum brake booster and the J 22805-B (1) to the bracket.
6. Rotate the vacuum booster clockwise until the locking tab (2) engages the cowl flange.
Ensure the booster locking tab fully engages in the bracket.
7. Remove the J 22805-B from the vacuum brake booster and discard the master cylinder nuts.
8. Install the vacuum brake booster check valve and hose assembly (1).