Generally, you have to hardwire your trailer adapter. But you can improve that with certain accessories. The Hopkins 47345 4 Wire Flat Adapter gives you a universal adapter. There are led lights that light up to troubleshoot, and installation is a breeze. This is one of the better universal light connectors out there. The design is something you’ll be using for as long as you own a trailer.
Positive Review: “Perfect fit for a 2004 TrailBlazer, takes the guesswork out of hitching.”