Sync your trailer lights with your vehicles lights through the Trailer Wiring Electrical Adapter. It will allow you to connect and adapt your vehicle's wiring system to your trailer wiring system, helping you to communicate your actions to other drivers. Non-GM warranty. Limited warranty by CURT™ Group. For more information, contact your dealer. 7-Way Trailer Wiring Electrical Adapter by CURT™ Group - Associated Accessories