Will this Tech Tip help with this?
Troubleshooting a Gas Gauge on a Stovebolt written by Phak1 and tech review by Jon G.
"One of the most asked question, on this forum is how do I fix my inoperative gas gauge. I wrote this procedure first as a "Sticky Thread", then I just reformatted it into a PDF so pictures could be inserted into the procedure. This was written for 47-55 first series trucks but may apply to many more years as the systems are very similar." ~ Phil H.