my gas gauge does not work registers full most of the time regardless on 1997 Buick LeSabre

need help as to how to solve this problem

Asked by for the 1997 Buick LeSabre
Have a mechanic check it out for you. Could be tank unit, wire or connections dash cluster problem.
1 more answer
possible sender failure. located in the gas tank. you will have to pull the gas tank to access it.