JD, Check out the Speedhut offering. I put one in my truck and it works GREAT! Comes with wiring harness and everything you need for installation. It uses the existing fuel rail pressure transducer for its driver. After you mount the gauge simply clip the yellow wire from the gauge to the orange/black wire on the pressure transducer. Then hook up switched power, running lights and grounds and it's done. Here is a link to their site...