I have a '75 short box with the gas tank in the cab behind the seat. Just bought the truck last Fall and I've been working on it on and off since. I have had the gauges out and checked things and they all looked good so I put them back in. They all work except "maybe" the gas gauge. It read empty so today I took the truck out for the first time and drove straight to the gas station. I went to fill it up and it wouldn't take any fuel. So I went right back to the shop and looked inside with a light and the tank was full! The first thing I thought was, "who sells a truck with a full gas tank"?!?! Second thing I thought was, "is it the gauge, is it the sending unit, is it the wiring"...

So, just thought I would ask here if anyone has spent time tracing this problem down and where I should start.

Thanks!