1. Features: The EL - 50448 tire pressure monitoring system reset tool can help you reprogram all tires more easily in just three steps. The tire pressure monitoring sensor activation tool is simple, fast and easy to use. You can activate a single tire pressure monitoring (TPM) sensor by just pressing one button. It is an essential tool when replacing tire pressure sensors, eliminating tire pressure alarms or changing tires. This tool is suitable for most General Motors vehicles (Chevrolet, Buick, GMC, Opel) equipped with 315 or 433 MHz tire pressure monitoring system (TPMS) sensors. 2. How to use: - Ensure that the vehicle is in the tire pressure monitoring system learning mode and follow the maintenance procedures. - Place the tool against the tire sidewall near the valve stem. - Press the learning button when the tool is against the tire sidewall. 3. For different vehicles, the EL50448 may take different times to reset all tire sensors after tire rotation. 4. Precautions: - When using the EL50448, make sure the antenna is in the correct position. - Ensure that the 9 - volt battery is in good condition. 5. How to use - Step 1 - Enter the learning mode: Set the shift lever to... (The original text is incomplete here)