How to Reset the Tire Pressure Light (TPMS) on a Chevrolet Trailblazer

1. Set the parking brake and turn the ignition on without starting the vehicle, or place it in Service Mode.
2. On the infotainment display, open Vehicle Status, touch Maintenance, then touch Tire Pressure.
3. Touch Relearn Tire Pressure and, if asked, touch Relearn to confirm; two audible alerts and the RELEARNING TIRE PRESSURE message appear.
4. Hold the relearn tool against the driver side front tire sidewall near the valve stem and press its button until a single alert sounds.
5. Repeat on the passenger side front, passenger side rear, then driver side rear tire; two alerts at the last tire end the process.
6. 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; a TPMS relearn tool is required.
• You have two minutes for the first tire and five minutes overall, or the process stops and must be restarted.

Source: 2026 Chevrolet Trailblazer owner's manual, PDF pages 241, 242. 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.