My cranking battery failed to start my Opti so I unhooked and rehooked to one of my trolling motor batteries so I could start the motor and get back to the truck.

On the way home I stopped and bought a new cranking battery and hooke everything back up. Somewhere in the process my gas gauge pegged out on full and has not returned. I thought it might be stuck and would start working again after a few trips. It has been that way since late fall.

Anyone know what I can do to fix the issue?