CTS Sedan RWD V6-3.0L (2010)
5. Remove the vacuum hose (2) from the vacuum port on the LH side of the intake manifold.
6. Release the power vacuum brake booster hose quick connect (1) from the power vacuum brake booster auxiliary pump.
7. Remove the check valve from the power vacuum brake booster hose, if necessary.
Installation Procedure
1. Install the power vacuum brake booster hose quick connect (1) to the power vacuum brake booster auxiliary pump.