Fuel Gage reading full all the time

SOURCE: Fuel gage

They get gumed up(more so if they have sat for awhile) other than pulling them out of the tank. the easyest thing to do is add some antiguming fuel additive to your gas. it takes some time. It will losen them up.

SOURCE: fuel gage goes to zero and then to full while driving

Sounds like the sending unit is bad, which is in the gas tank.

SOURCE: The fuel gauge doesn't read right, makin' low fuel light flash

if the fuel pump is all in-tank; the sending unit built in to the fuel pump is most likely malfunctioning; if so, this will require removal and replacement of the entire fuel pump, sometimes expensive, others not so much

Testimonial: "thank you very much for the help"

SOURCE: 2001 Yukon XL fuel gage showing inacurate reading

Check for moiosture or corrosion around the tank sender unit connections- if all ok there, you may need a new fuel sender unit.

SOURCE: gmc jimmy 1999, fuel gauge reading empty, even

the sending unit inside the tank has a open circuit that will not complete the signal to the dash gage. The tank will have to be dropped to replace this. The fuel pump is also a part of the sending unit. The part is not very cheap neither