How do you change the windshield washer tank on a 2005 CTS?

To change the windshield washer tank on a 2005 Cadillac CTS, first, ensure the vehicle is turned off and the battery is disconnected for safety. Remove any necessary components that obstruct access to the tank, such as the front bumper or undercarriage panels. Disconnect the hoses and electrical connectors from the old tank, then unbolt it from its mountings and remove it. Install the new washer tank by securing it in place, reconnecting the hoses and electrical connectors, and reassembling any parts you removed.