Side/window Air Bag problems of the 2007 Chevrolet Malibu

While driving the passenger side air bags turn off even with a passenger in the seat and it deactivates and activates intermittently throughout the course of driving. Dealership unable to duplicate the problem when servicing so I don't know if I actually have air bags when passengers are present. I was told the control module for the air bags may be bad, seems like this is a serious safety issue that somebody should be addressing.

The passenger side air bag "off" light remains on when passenger weight is approximately 120 pounds or less. The "off" light will turn off when a heavier person is in the front passenger seat. The dealer said, after I bought the car, that the weight setting was not adjustable. Chevrolet and gm customer support on the internet was not helpful. The vehicle is used infrequently and seldom with a passenger. Current mileage is 17,000 miles. The dealer contacted their district office on 2/5/2015 and he said that the district office told him that the condition was within design parameters. The district office confirmed that when the "off" light is on that the air bag will not work. This is a safety hazard for lightweight adults and children who are riding in the passenger seat.

I recently leased a 2007 Malibu. The passenger side airbag does not work when a cushion is placed on it to give my wife the height so she can see. Apparently the sensors are set to a heavy weight, so if there are small people such as children in the front passenger seat the airbag safety system will not activate if they sit on a cushion. I spoke to gm customer service people in detroit, and they said they had never heard of this. It seems to me that in designing a safety system, consideration should be given to smaller and lighter people, or have a fix available so the system works.