Mid/rear Seats Assembly problems of the 2007 GMC Sierra 1500

This is the e-mail I sent to gm regarding the problem with the back seat and how I feel this is a safety issue. They did not respond to my e-mail so by the 8th day I called and they said they closed the case based on what the dealer said, "condition does not represent a safety hazard. " I strongly disagreed and pursued it further getting the same answer. Here is the e-mail: I have a 2007 sierra GMC with a back seat that has movement (play) in it due to what gm calls a "rattle clip" breaking. I questioned the dealership when taking the vehicle in for a different repair and was told that it was just a rattle clip. I have called gm regarding the safety issue and was given an authorization for a covered diagnostic on the truck. Again, the dealership said, "found 2 seat back rattle clips broken. Condition does not represent a safety hazard. " I declined the repair based on the fact there is no known cause for the failure of these clips except for the simple fact they are cheap plastic. I do not feel replacing a plastic clip with another plastic clip will fix the problem. It will only be a matter of time before they fail and the seat has play in it. I question if they would even hold in the event of an automobile accident. When strapping in a child's car seat there is to be no movement in it in case of an accident for obvious safety reasons. I do not see how a back seat that has a 1 1/2 inch or more of play in it is not considered a safety issue. I have a video I would like to e-mail you so you can determine this for yourself. I am requesting they address this safety issue so my family and any other passengers can be safe while riding in my GMC. I would like to point out although they named this part a "rattle clip" it serve more of a purpose than to just stop a rattle nose. It secures the back of the seat to the frame of the truck so there is no movement.