How do you reset tire monitor on Cadillac STS 2008?

To reset the tire monitor on a 2008 Cadillac STS, first, ensure that all tires are properly inflated to the recommended pressure. Next, turn the ignition to the "ON" position without starting the engine. Press and hold the tire pressure monitor reset button, usually located under the dashboard or in the glove compartment, until the tire pressure light blinks and then turns off. Finally, start the vehicle, and the system should be reset.