The gas gauge is not working all the time what can I check for this?

on 2005 GMC Envoy

I put gas in the car and it does not register correctly. could this be a sensor problem?

Asked by for the 2005 GMC Envoy
i have a 2005 envoy the fuelguage sensor is bad.part number 19178477. thiss si a recall by gmc .
2 more answers , 1 more comment
recomend you have fuel tank droped and change out fuel level sensor. It a common problem with these GM SUV. there is a recall out for this problem.
yes the recall is for level sensors contact wear.
more than likley its the sending unit in the gas tank but a lot of times you have to get the whole unit with fuel pump which could get expensive