CTS RWD V8-6.2L SC (2009)
7. Remove the master cylinder nuts (1).
8. Remove the master cylinder (1) from the power vacuum brake booster.
9. Inspect the master cylinder to power vacuum brake booster seal for damage and replace, if necessary.
Installation Procedure
1. Position the master cylinder to power vacuum brake booster seal to the groove in the master cylinder body.
Ensure the seal is positioned properly and is not deformed.
2. If installing a new master cylinder, bench bleed the master cylinder. Refer to Master Cylinder Bench Bleeding (See: Procedures/Master Cylinder
Bench Bleeding).