This is a tire pressure reset tool designed to assist in the sensor relearn procedure. After each tire rotation, or when replacing tires, the body control module, or tire pressure sensors, the relearn procedure must be performed to ensure accurate tire pressure value acquisition and display. Operation steps: 1. Ensure the vehicle is in TPMS learning state/mode. 2. Following the vehicle manufacturer’s instructions, 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 signal transmission. When the vehicle’s buzzer sounds, the matching process is successful. 4. Repeat the process for the remaining tires. Specifications: - Compact design for portability and easy handling - Enables real-time tire pressure system activation - Diagnostic sensing capability for compatibility verification - Universal fitment for most vehicles equipped with TPMS - Required for GM vehicles with 315 MHz or 433 MHz Tire Pressure Monitoring (TPM) systems after tire rotation, remote keyless entry receiver replacement, or tire pressure sensor replacement - Relearn procedure compatible with special tool EL-50448 and applicable to 2014 GM models - Note: Only designated diagnostic tools can read tire pressure sensor data on 2012 and later model years Package Included: 1 x Tire Pressure Reset Tool