The Tire Pressure Monitor (TPM) system uses radio and sensor technology to check tire pressure levels. Sensors mounted on each tire and wheel assembly, excluding the spare tire and wheel, transmit tire pressure readings to a receiver located in the vehicle. Tire pressure status and tire pressure warnings are shown on the Driver Information Center (DIC) display. For additional information and details about the DIC operation, see "DIC Controls and Displays" in the Index of the DeVille owner manual.

If the TPM system detects a significantly underinflated tire, CHECK TIRE PRESSURE will appear on the Driver Information Center (DIC) display. Stop as soon as possible and check your tires. Inflate them to the proper pressure as shown on the tire and loading information label. See Inflation - Tire Pressure for additional tire pressure information.

Notice: Do not use a tire sealant if your vehicle has Tire Pressure Monitors. The liquid sealant can damage the tire pressure monitor sensors.

Your vehicle's TPM system can alert you about a low tire pressure condition, but it does not replace normal tire maintenance. See Tire Inspection and Rotation for additional information. Also see "When It's Time For New Tires" in the Index of the DeVille owner manual.

The spare tire and wheel assembly does not have a TPM sensor. If you replace a TPM equipped tire and wheel with the spare tire and wheel, the SERVICE TIRE MONITOR message will be shown on the DIC display. This message should go off once you re-install the 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 TPM message to be displayed. See your Cadillac dealer for service.

Each TPM sensor has a unique identification code. The codes are matched to each tire and wheel position on your vehicle. Any time you replace one or more of the TPM sensors or rotate the tires, the TPM system will need to be reset. A special tool is needed to reset the sensor identification codes. See your dealer for service.

The Tire Pressure Monitor System (TPMS) is designed to monitor the amount of pressure in your vehicle's tires using radio and sensor technology. A TPMS sensor, mounted onto the vehicle's full-size tire and wheel assembly, transmits tire pressure readings to a receiver located in the vehicle. The compact spare tire and wheel does not have a TPMS sensor. Tire pressure status and tire pressure warnings are shown on the Driver Information Center (DIC) display. For additional information and details about the DIC operation and displays see DIC Controls and Displays and DIC Warnings and Messages .

If a low tire pressure condition is detected, the TPMS will display the CHECK TIRE PRESSURE warning message on the DIC and, at the same time, illuminate the low tire pressure warning symbol, on the instrument panel cluster.

You may notice, during cooler weather conditions, that the low tire pressure warning symbol and the CHECK TIRE PRESSURE message will display when the vehicle is first started and then turn off as you start to drive the vehicle. This could be an early indicator that the tire pressures are getting low and need to be checked and inflated to the proper pressure.

Each tire, including the spare (if provided), should be checked monthly when cold and inflated to the inflation pressure recommended by the vehicle manufacturer on the vehicle placard or tire inflation pressure label. (If your vehicle has tires of a different size than the size indicated on the vehicle placard or tire inflation pressure label, you should determine the proper tire inflation pressure for those tires.)

As an added safety feature, your vehicle has been equipped with a tire pressure monitoring system (TPMS) that illuminates a low tire pressure telltale when one or more of your tires is significantly under-inflated.

Accordingly, when the low tire pressure telltale illuminates, you should stop and check your tires as soon as possible, and inflate them to the proper pressure. Driving on a significantly under-inflated tire causes the tire to overheat and can lead to tire failure. Under-inflation also reduces fuel efficiency and tire tread life, and may affect the vehicle's handling and stopping ability.

Please note that the TPMS is not a substitute for proper tire maintenance, and it is the driver's responsibility to maintain correct tire pressure, even if under-inflation has not reached the level to trigger illumination of the TPMS low tire pressure telltale.

The CHECK TIRE PRESSURE warning message and low tire pressure light (telltale) will appear at each ignition cycle until the tires are inflated to the correct inflation pressure.

The Tire and Loading Information Label shows the size of your vehicle's original tires and their recommended cold inflation pressures. See Loading the Vehicle , for the location of the tire and loading information label. Also see Inflation - Tire Pressure .

Your vehicle's TPMS can alert you about a low tire pressure condition but it does not replace normal tire maintenance. See Tire Inspection and Rotation and Tires .

Notice: Do not use a tire sealant if your vehicle has Tire Pressure Monitors. The liquid sealant can damage the tire pressure monitor sensors.

Each TPMS sensor has a unique identification code. Any time you replace one or more of the TPMS sensors, rotate the vehicle's tires, or install a full-size spare that has a TPMS sensor, the sensor's identification codes will need to be matched to the new tire/wheel position. Each tire/wheel position is matched to the TPMS sensor using a TPMS diagnostic tool. See your GM dealer for service.

The TPMS sensors may also be matched to each tire/wheel position by increasing or decreasing the tire's air pressure. When increasing the tire's air pressure, do not exceed the maximum tire pressure indicated on the tire's sidewall.

You will have two minutes to match the first tire/wheel position, and five minutes overall, to match all four tire/wheel positions. If it takes longer than two minutes, to match the first tire and wheel, or more than five minutes to match all four tire and wheel positions the matching process stops and you will need to start over.

The TPMS matching process is outlined below:

1. Set the parking brake.
2. Turn the ignition switch to RUN with the engine off.
3. Press the Driver Information Center (DIC) vehicle information button until the RELEARN TIRE POSITIONS displays.
4. Press the set/reset button to allow the system to learn the tire positions. The horn will sound twice to indicate that the TPMS is ready, and then the message TIRE LEARNING ACTIVE will display. The sensor matching process can begin.
5. Start with the driver's side front tire.
6. Remove the valve cap from the valve stem. Activate the TPMS 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 pointed end of the valve cap, a pencil-style air pressure gage or a key.
7. Proceed to the passenger's side front tire, and repeat the procedure in Step 6.
8. Proceed to the passenger's side rear tire, and repeat the procedure in Step 6.
9. Proceed to the driver's side rear tire, and repeat the procedure in Step 6.
10. When the re-learning is complete, the horn will sound and the TIRE LEARNING ACTIVE message will clear from the DIC display. Exit the matching process by turning the ignition switch to OFF.
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 compact spare tire does not have a TPMS sensor. If you replace one of the road tires with the compact spare, the SERVICE TIRE MONITOR SYSTEM message will be displayed on the DIC screen. This message should go off once you re-install the road tire containing the TPMS sensor. The SERVICE TIRE MONITOR SYSTEM message is also displayed when a part of the TPMS is not working properly. One or more missing or inoperable TPMS sensors will cause the service tire monitor message to be displayed. See your GM dealer for service if all the TPMS sensors are installed and the error message comes on and stays on.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

1. This device may not cause interference.
2. This device must accept any interference received, including interference that may cause undesired operation.

This device complies with RSS-210 of Industry Canada. Operation is subject to the following two conditions:

1. This device may not cause interference, and
2. This device must accept any interference received, including interference that may cause undesired operation of the device.

Changes or modifications to this system by other than an authorized service facility could void authorization to use this equipment.