2006 Trailblazer Two issues. 1) Liftgate module falling asleep (3rd time). Issues (all intermittent, don't know what triggers the issues): Door locks-cannot use fob, must use key to open. Rear liftgate will not open or will not unlock or may even lock itself. Cannot open rear window. Radio used to shut off when opening doors, now shuts off already when you shut off the vehicle. Dome light stays on while driving. Result: Replaced & programmed left front door lock actuator & lift gate module. Replaced it twice in four years, now it is happening again. Question: Do I spend ANOTHER $800 to fix this AGAIN? After three times, would GM do anything for me? 2) Regardless of high or low thermostat setting, left vent ALWAYS blows cold air. Right vent works appropriately. I saw Trailvoy member Huggy03 post in 2008 that he replaced the replaced the mode actuator. Could that be a solution?