Gas Gauge quit working

Yet another issue with my 67 Coronet. I did not start nor move the car for the last 2 weeks. So today I went in the garage to start it up and take it for a drive. Look down to check the gauges and lo and behold the gas gauge wasn't working. It had 3/4 of a tank 2 weeks ago. Itried putting gas in it but the gauge still didn't move. Any ideas were to start looking for the problem ??
Author: bulldog