This is a tire pressure reset tool designed to assist in the sensor relearn procedure. After tire rotation, replacement of tires, body control module, or tire pressure sensors, the relearn process must be performed to ensure accurate tire pressure readings and display. Operation steps: 1. Ensure the vehicle is in TPMS learning mode. 2. Following the vehicle manufacturer’s instructions, use the tool sequentially at each tire (front left, front right, rear right, rear left). Position the tool near the tire sidewall close to the valve stem and press the reset button. 3. The green LED (TX light) will illuminate, indicating signal transmission. When the vehicle emits a chime, the matching process is successful. 4. Repeat the process for the remaining tires. Features: - Compact and portable design - Real-time tire pressure monitoring capability - Diagnostic sensing function - Compatible with most vehicles equipped with TPMS - Required for GM vehicles with 315 MHz or 433 MHz Tire Pressure Monitoring systems after tire service or component replacement - Supports the sensor relearn procedure for 2012 and later models; compatible with 2014 GM models - Relearn procedure can be completed using compatible diagnostic tools as specified by the manufacturer Package Includes: 1 x Tire pressure reset instrument