This is a new EL-50448 TPMS (Tire Pressure Monitoring System) reset tool designed for General Motors (GM) vehicles. It allows you to relearn and reset tire pressure sensors after tire rotation, replacement, or sensor servicing. This tool is a practical purchase for DIY mechanics or shop owners working on compatible GM cars and trucks, helping to ensure proper TPMS function without a dealership visit. The item ships with free shipping. As a specific diagnostic tool, always verify it matches your vehicle's make, model, and year. Check the listing for full details on compatibility and any included accessories. EL-50448 TPMS Reset Tool Relearn Auto Tool Tire Pressure Sensor For GM. Condition: New. Listed at 3.99 USD. EL-50448 TPMS Reset Tool Relearn Tool Auto Tire Pressure Sensor For GM Vehicles. Hold the tool against the sidewall of the tire, near the valve core. Press learn button while holding the tool against the tire sidewall until hearing horn sound from the car.