GM Genuine Parts Tire Pressure Monitoring System Valve Kits are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These kits are conveniently packaged with additional components to service your tire pressure monitoring systems (TPMS), and are GM-recommended replacements for your vehicles original components. These battery-operated sensors are located in the tires of your vehicle and help monitor tire pressure. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).