I have an '07 G6 sedan. My doors have stopped unlocking when put into park and locking when put into drive. The next day I noticed the cruise control wasnt working. Im clueless when it comes to cars so I would really appreciate any help. I've also noticed that my fuel gauge drops real fast once it has 1/4 of a tank left. I noticed that when it was around 65,000 miles and it just hit 69,000 not too long ago.