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

1. Set the parking brake and turn the ignition switch to ON/RUN with the engine off.
2. Press and hold the RKE transmitter's lock and unlock buttons together for about five seconds until the horn sounds twice.
3. Starting at the driver side front tire, remove the valve cap and raise or lower the tire's air pressure for about eight seconds.
4. Wait for the horn chirp and the turn signals flashing once, then repeat at the passenger front, passenger rear and driver rear tires in that order.
5. After two more horn chirps, turn the ignition switch to LOCK/OFF.
6. Set all four tires to the pressure on the Tire and Loading Information label and replace the valve caps.

• You have two minutes to match each tire and wheel position, or the process stops and you must start over.
• Vehicles without RKE use the DIC: press INFO and Set/Reset together, select TIRE LEARN?, then hold Set/Reset about three seconds.

Source: 2010 Chevrolet Cobalt owner's manual, PDF pages 343, 344, 345. 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.