Guage says FULL....It isn't.

[rharmyguy]

My fuel guage always goes to FULL with the key on. I know it isn't. I've replaced the sending unit in the tank and the guage from a donor car. Is there a relay that would be JACKED UP causing this? And where would it be?
95 Grand Am

 

[smartassguy2_68]

full.

maybe the gauge is bad..