Hey brutha. Big fan. Hey i have a 73 c10 with a 350. I got into it one day and my fuel gauge was pegged out way past full and i know i only had a 1/4 of tank. I am mecp certified so i know how to use a multimeter, what do i need to test with it to figure out whats wrong?

odds are it's a bad sending unit inside the gas tank. disconnected the sender wiring, if it goes away, that's it. if not, odds are the dash unit is bad