Got this fixed at GM dealer. Was taking forever to fill my gas tank at the gas station. They said it was this one problem which they "fixed". The problem was still there when I next filled the gas tank. Took it back to the dealer who identified a different problem which cost more dollars to fix. Same result - not fixed. took it back & they then said the problem must be under the hood which finally fixed it. GM is producing well built cars which have been poorly engineered from a parts standpoint and then rewarding the dealers with tons of service work.