How to Reset the Tire Pressure Light (TPMS) on a Cadillac CTS and CTS-V

1. Set the parking brake and place the vehicle in Service Mode.
2. Make sure the Tire Pressure info display is on, then scroll to the Tire Pressure screen with the five-way DIC control.
3. Press and hold SEL in the center of the control until the horn sounds twice and TIRE LEARNING ACTIVE appears.
4. Hold the relearn tool against the driver side front tire sidewall near the valve stem and press its button until the horn chirps.
5. Repeat at the passenger side front, passenger side rear, then driver side rear tire; the horn sounds twice at the end.
6. Turn the vehicle off and set all four tires to the pressure on the Tire and Loading Information label.

• You have two minutes for the first tire and five minutes overall, or the process stops and must be restarted.
• The malfunction light and DIC message should go off at the next ignition cycle.

Source: 2019 Cadillac CTS and CTS-V owner's manual, PDF pages 313, 314. Steps are summarized in our own words (AI-assisted, checked against the cited pages 2026-10-18). Other model years can differ; your manual has the final word.