For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition
65 WarningAuxiliary Devices
Using the Auxiliary Input Jack
Settings menus and functions may
vary depending on vehicle options.
The auxiliary input jack can be used
to connect external audio devices
such as an iPod, iPhone, MP3
player, and other supported devices
for use as another source for audio
listening. This inp ...