I got a new catalytic converter put in and my fuel gauge hasn't worked since. Right after it happened, my fuel gauge would show about 3/4 a tank when I know I was about empty now it just shows full all the time no matter how much gas i have in it.

I'm guessing they did something when they put a new catalytic converter in that messed up some sensor? I don't know. My dad took it somewhere to get it fixed and he told me my blazer actually had 2 catalytic converters? And that when they fixed it they rerouted my exhaust to only have one catalytic converter? If that makes any sense...

I haven't ran my OBD scanner yet I will when I find it.

I have a 2002 Chevy Blazer ZR2