Im hooking up an Autometer fuel level gauge in my 98 Chevy Truck/Ls1. Its got the stock sending unit and tank. I bought the 0-90 ohm gauge hoping it would work. (Autometer said this was the most common these years) Located the wire in the dash for the sending unit. Now when I turn my lights on the gauge goes to full. Any help or suggestions would help. I think tomorrow I might drop the tank and check the ground for a start.....