Check to make sure everything else is working properly. I discovered that the auto door locks didn't lock when I moved the shifter into drive and didn't open when moved back to park. The cruise did not work, the remote start wouldn't work and the transmission did not shift smoothly. After 3 trips to the dealer they found a (TSB) technical service bulletin that told them to reflash the (ECM) computer. Completed this last week and issue was resolved.