How do you replace shifter assembly in a 2001 Cadillac dts?

To replace the shifter assembly in a 2001 Cadillac DTS, start by disconnecting the battery and removing the center console to access the shifter. Unscrew and detach the old shifter assembly from its mounting points, and disconnect any electrical connectors. Install the new assembly by reversing the steps, ensuring all connections are secure, and then reassemble the console. Finally, reconnect the battery and test the shifter for proper operation.