How to Reset the Tire Pressure Light (TPMS) on a Cadillac DTS

1. Set the parking brake.
2. Turn the ignition to ON/RUN with the engine off.
3. Press the RKE transmitter's lock and unlock buttons together for about five seconds until the horn sounds twice and TIRE LEARNING ACTIVE shows.
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 after the last one.
6. Turn the ignition to LOCK/OFF, then set all four tires to the pressure on the Tire and Loading Information label.

• A TPMS relearn tool is required; see your dealer for service or to purchase one.
• You have two minutes for the first tire and five minutes overall, or the process stops and must be restarted.
• Do this after rotating tires or replacing a TPMS sensor or swapping the spare for a road tire with a sensor.

Source: 2011 Cadillac DTS owner's manual, PDF pages 365, 366. 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.