I have a 07 LTZ that is crazy. It thinks the lift gate is open, when its not. This means you have to turn off the interior lights to drive at night otherwise they stay on. The power liftgate sometimes makes a really bad knock noise as it is closing. Sometimes when we hit a bump the door locks freak out switching several times without any buttons being hit. It has been to the dealer, twice, and of course they could not get it to do it. :grrrrrr: Anyone having these types of problems? Please help!