This is a tire pressure reset tool designed to assist in the sensor relearn procedure. After each tire rotation, tire replacement, body control module update, or tire pressure sensor replacement, the sensor relearn process must be performed to ensure accurate tire pressure reading and display. Operation steps: 1. Ensure the vehicle is in TPMS learning mode. 2. Following the vehicle’s service procedure, place the tool near each tire in sequence (front left, front right, rear right, rear left), aligning it with the tire sidewall close to the valve stem (the air inlet), then press the reset button. 3. The green LED (TX light) will illuminate, indicating signal transmission. When the vehicle emits a chirp or horn sound, the matching is successful. 4. Repeat the process for the remaining tires. Specifications: - Compact design for portability and easy handling - Enables real-time signal transmission for sensor activation - Compatible with most vehicles equipped with TPMS systems - Supports diagnostic functions for sensor communication verification - Suitable for use on vehicles requiring sensor relearning after maintenance - Required for GM vehicles with 315 MHz or 433 MHz TPMS systems after tire rotation, module replacement, or sensor change - Relearn procedure compatible with 2012 and later models; special tools may be required for certain diagnostics - Recommended tool for performing the sensor relearn process on applicable 2014 GM models Package Included: 1 x Tire Pressure Reset Tool