How to Reset the Tire Pressure Light (TPMS) on a Buick Cascada

1. Set the parking brake and put the vehicle in P (Park).
2. Turn the ignition on without starting the vehicle.
3. Press MENU to select the Vehicle Information Menu, then scroll with the thumbwheel to the Tire Pressure Menu Item screen.
4. Press SET/CLR to begin, then press SET/CLR again to confirm; the horn sounds twice and TIRE LEARNING ACTIVE shows.
5. Hold the relearn tool against the driver side front tire sidewall near the valve stem and press its button until the horn chirps.
6. Repeat at the passenger side front, passenger side rear, then driver side rear tire; two horn sounds end the process.
7. Turn the vehicle off and set all four tires to the pressure on the Tire and Loading Information label.

• Needed after rotating tires or replacing TPMS sensors, or swapping a spare for a road tire with a sensor.
• You have two minutes for the first tire and five minutes overall, or the process stops and must be restarted.
• A TPMS relearn tool is required; it is available from your dealer or GM Tools.

Source: 2019 Buick Cascada owner's manual, PDF pages 223, 224. 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.