As long as i've had this suburban the rear lift glass wont open but the cargo door will. Your supposed to unlock the vehicle and press the button and it will open. When i press my button it goes it, gets stuck and will not release the glass or button and the button gets stuck. The actuator works i believe because i can hear it lock and unlock also when i lock/unlock i can feel it move the button. Using a key will not make a difference. It opened yesterday for the first time ever but once i shut it, it would not reopen