This is a tire pressure reset tool designed to assist in the sensor relearn procedure. After each tire rotation, tire change, body control module replacement, or tire pressure sensor replacement, the sensor relearning procedure must be performed to ensure accurate tire pressure value acquisition and display. Operation steps: 1. Ensure the vehicle is in TPMS learning state or mode. 2. Following the vehicle manufacturer’s maintenance procedure, use the tool sequentially (front left, front right, rear right, rear left), positioning it near the tire sidewall close to the valve stem (the air filling inlet), then press the reset button. 3. The green LED light (TX light) will illuminate, indicating the signal is being transmitted. When the vehicle’s horn or buzzer sounds, the matching process is successful. 4. Repeat the process for the remaining tires. Specifications: - Compact design for portability and easy handling - Real-time tire pressure monitoring capability - Diagnostic sensing function included - Compatible with most vehicles equipped with TPMS systems - For GM vehicles with 315 MHz or 433 MHz Tire Pressure Monitoring (TPM) systems, the sensor relearn procedure is required after tire rotation, remote keyless entry receiver module replacement, or tire pressure sensor replacement - This relearn procedure is applicable to 2012 and later models, including 2014 GM vehicles - Specialized diagnostic tools may be required to read tire pressure sensor data on certain 2012 and newer models Package Included: 1 x Tire pressure reset instrument