I was looking at a few sites (particularly chevrolet.com, buick.com and cadillac.com and there was no information as to this question: if I plug in an iPod into the USB port provided in today's GM cars, do they only play MP3 music files? Can they play lossless files such as AAC files? Please advise since I will likely look for this feature in my next GM car.

While I don't know the specifics, I've never had a file on my iPod not play in a GM car and I have a mix of all sorts of file types.

While I don't know the specifics, I've never had a file on my iPod not play in a GM car and I have a mix of all sorts of file types.

That is a comforting thought. Thank you.

But I think that hooked to the USB the car's radio would do the decoding not the IPOD if hooked to the speaker jack the IPOD would do the decoding

But I think that hooked to the USB the car's radio would do the decoding not the IPOD if hooked to the speaker jack the IPOD would do the decoding

Good to know that too. Thanks.