This tire pressure reset tool is designed to perform the sensor relearn procedure after tire rotation, tire replacement, body control module replacement, or tire pressure sensor replacement. This process ensures accurate tire pressure value acquisition and display. Operation steps: 1. Ensure the vehicle is in TPMS learning mode. 2. Follow the vehicle manufacturer’s maintenance procedure. Sequentially position the tool near the tire sidewall close to the valve stem (air fill inlet) for each tire (front left, front right, rear right, rear left) and press the reset button. 3. The green LED (TX light) will illuminate, indicating signal transmission. When the vehicle’s horn or buzzer sounds, the matching process for that tire is complete. 4. Repeat the process for the remaining tires. Features: - Compact and portable design - Real-time tire pressure monitoring capability - Compatible with diagnostic tools used for reading tire pressure sensors on 2012 and later models - Includes diagnostic sensing function - Universal fit for most vehicles - Suitable for GM vehicles equipped with 315 MHz or 433 MHz Tire Pressure Monitoring (TPM) systems - Meets the requirements for the "Sensor Relearn Procedure" as specified for GM vehicles, including 2014 models - Can be used in place of special tool EL-50448 for the relearn process Package includes: 1 x Tire pressure reset instrument