on my 08 malibu ltz I have always had very picky door locks like random work when they too But recently had the recall done for brake light / BCM now they hardly ever work right but they do go up and down vigorously on their own while driving. took to dealer they said i needed all new actuators because they were "weak" but they sure arent weak when they go on their own ...any suggestions also they do go down when put in drive but only sometimes do they go back up when put in park.