2005 Cadillac STS Owner's Manual - Page 352

The TPM matching process is outlined below: 1. Set the parking brake. 2. Press the push-button ignition switch to OFF/ACC. 3. Using the Keyless Access transmitter, lock and unlock the vehicle's doors. 4. Press the lock and unlock buttons, at the same time, on the Keyless Access transmitter. A single horn chirp will sound, indicating that the TPM system is ready, and the sensor matching process can begin. 5. Start with the left (driver's side) front tire. 6. Remove the valve cap from the valve stem. Activate the TPM sensor by increasing or decreasing the tire's air pressure for five seconds, or until a horn chirp sounds. The horn chirp, which may take up to 30 seconds, confirms that the sensor identification code has been matched to this tire position. To decrease the tire's air-pressure use the pointy end of the valve cap, a pencil-style air pressure gage or a key. 7. Proceed to the right (passenger's side) front tire, and repeat the procedure in Step 6. 8. Proceed to the right (passenger's side) rear tire, and repeat the procedure in Step 6. 9. Proceed to the left (driver's side) rear tire, and repeat the procedure in Step 6. 10. After hearing the confirming double horn chirp, for the left rear tire, exit the matching process by turning the ignition switch to OFF/ACC. 11. Set all four tires to the recommended air pressure level as indicated on the tire and loading information label. 12. Put the valve caps back on the valve stems. The spare tire does not have a TPM sensor. If you replace one of the road tires with the spare, the SERVICE TIRE MONITOR message will be displayed on the DIC screen. This message should go off once you re-install the road tire containing the TPM sensor. The SERVICE TIRE MONITOR message is also displayed when the TPM system is malfunctioning. One or more missing or inoperable TPM sensors will cause the SERVICE TIRE MONITOR message to be displayed. See your GM dealer for service. 5-62