Fuel Guage Problem

I have an 03 Express van and after a sudden stop my gas guage has quit working, it reads no fuel and the gas light stays on. Is it a float problem in the tank? I've also had my guages go crazy one day with the speedo not working and temp going high. The only thing I can think is bad ground somewhere or the float is stuck, any help would be appreciated before I drop the tank, maybe save some work.

Thank you

Based on the fact that the gauge is out and that previously the other gauges got weird previously, I'd look at grounds and also the connections at the PCM.