how much gas???

my b2200 gas gadge wont work. when the tank is close to empty its shows close to less than 1/8th of a tank. could it be a simple fix?

if its a stock gas tank it could be the fuel pump assembly that bolts to top of tank .. jus unbolt it and make sure the floater is moving up and down .. if its aftermarket the tank could have foam in it and not allowing arm to operate

ok so i guess i have to take the bed off then?

take the bed off or drop the tank by undoing the straps much easier to pull the bed off then you have much more room to work