Mine had gone out @ about 70,000 miles and I think it was the sending unit, but it was so long ago, I can't quite remember exactly. The service tech just dropped the fuel tank, which IMO was very easy to accomplish. Raising the bed seems like a lot of work compared to just loosening the two nuts on the tank straps and lowering the tank with a hyrdo jack. I had to lower mine a while back to install my custom traction bars and it took 5 minutes to get it out of the way.