Electrical Jack problems of the 2009 Chevrolet Suburban

Our actuators failed on 3 of my doors of my 2009 chevy Suburban. If you use the remote only the drivers side rear door locks and/or unlocks. If you use the unlock/lock power button only the drivers side rear works. You must use the key to unlock the drivers door and you must either open the window to manually unlock the other doors or reach across the car to unlock the passenger side locks. We contacted gm and they sent us to have a diagnosis done which cost us $99. They estimated the cost to be $900 and told us we were responsible because our warranty ended at 36,000 miles. This is a safety concern. In an accident I wouldn't be able to get to any passengers including my children nor could emergency personnel. I could easily be car jacked or have my belongings stolen due to the locks not working. If my small child choked or had a medical emergency I could not reach them. I watch stories every day on the news of awful people taking or assaulting women by breaking into their cars and hiding in the back seats. This car cost well over $50,000 and this should be a safety recall. There will be a tragedy if this is not fixed.