I have a 2005 Chevrolet Monte Carlo, supercharged ss, [xxx] signature series. The vehicle has active onstar, xm radio, sun roof and the rest of the bells and whistles connected with the vehicle. The problem is with the xm radio and onstar system. The antenna for all the radio systems are located on the rear roof, behind the sun roof. The problem occurs whenever you open the sunroof. The sunroof tilts up and covers the antenna. This causes the xm radio to lose signal. The main purpose of this complain is that the onstar also loses signal. This defeats the safety feature of the onstar system, because if you were in an accident, the onstar emergency personnel would not be notified and this would lead to severe injury and possibly death. I have taken the vehicle to ron anderson Chevrolet in fernandina beach, fl. They contacted their GM complaint desk and the reply was "that's just the way it is. Close the sunroof part way and that will help reception for the xm radio". there was some type of communication that I have a copy of that indicated the above, but said nothing about the onstar. With the sunroof open, the onstar cellular phone does not work, not I am almost postive that the emergency portion of the onstar is not working either. The VIN # is [xxx]. Chevrolet's postion indicated to me that they would not do anything to rectify this situation or even that they cared. The safety issue is what really concerns me, because the main reason that I purchased onstar was the fact that you had communications, and if emergency care was needed, it was there. This is an obvious safety issue and General Motors, in my opinion, could care less. Thanks for listening to me and I look forward to hearing from you or General Motors. Sincerely. Updated 07/17/2012 information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6)

- Fernandina Beach, FL, USA