GM Service Manual Online
For 1990-2009 cars only

This vehicle may have a Tire Pressure Monitor System (TPMS). The TPMS is designed to warn the driver when a low tire pressure condition exists. TPMS sensors are mounted onto each tire and wheel assembly, excluding the spare tire. The TPMS sensors monitor the air pressure in the vehicle's tires and transmit tire pressure readings to a receiver located in the vehicle.


Object Number: 1970731  Size: G7

When a low tire pressure condition is detected, the TPMS illuminates the low tire pressure warning light located in the instrument panel cluster.

The low tire pressure warning light comes on at each ignition cycle until the tires are inflated to the correct inflation pressure.

The low tire pressure warning light may come on in cool weather when the vehicle is first started, and then turn off as you start to drive. This could be an early indicator that the air pressure in the tire(s) are getting low and need to be inflated to the proper pressure.

You must begin driving before the TPMS system is operational. TPMS sensors need to be installed onto the full-size tire and wheel assemblies, and the tires adjusted to the manufacturers' recommended tire pressure amount.

A Tire and Load Information label is attached to the vehicle, and shows the size of the vehicle's original equipment tires and the correct inflation pressure for the tires when they are cold. See Loading the Vehicle , for an example of the Tire and Load Information label and its location on the vehicle. Also see Inflation - Tire Pressure.

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

Notice: Liquid tire sealants could damage the Tire Pressure Monitor System (TPMS) sensors. Sensor damage caused by using a tire sealant is not covered by your warranty. Do not use liquid tire sealants.

Each TPMS sensor has a unique identification code. Any time you replace one or more of the TPMS sensors or rotate the vehicle's tires, the identification codes are automatically learned by the TPMS. This occurs within a few moments of driving the vehicle over 19 mph (31 km/h).

TPMS Malfunction Light

The TPMS will not function properly if one or more of the TPMS sensors are missing or inoperable. When the system detects a malfunction, the low tire warning light flashes for about one minute and then stays on for the remainder of the ignition cycle. Some of the conditions that can cause the malfunction light to come on are:

    • One of the road tires has been replaced with the spare tire. The spare tire does not have a TPMS sensor. The TPMS malfunction light and DIC message should go off once you re-install the road tire containing the TPMS sensor.
    • One or more TPMS sensors are missing or damaged. The TPMS malfunction light should go off after the TPMS sensors are installed and the vehicle is driven for a few moments over 19 mph (31 km/h). See your dealer/retailer for service.
    • Replacement tires or wheels do not match the vehicle's original equipment tires or wheels. Tires and wheels other than those recommended for the vehicle could prevent the TPMS from functioning properly. See Buying New Tires.
    • Operating electronic devices or being near facilities using radio wave frequencies similar to the TPMS could cause the TPMS sensors to malfunction.

If the TPMS is not functioning it cannot detect or signal a low tire condition. See your dealer/retailer for service if the TPMS malfunction light comes on and stays on.