2005 Chevy Blazer with onstar

PAC OS2-Bose, I believe.  If you want the chimes, that's a seperate piece- I don't remember the model.My ex once told me I have a perfect face for radio.

Sooo.... why would you relocate the radio in a Blazer?? Last one I had through here wasn't Class 2. They look like a class2 deck, but they aren't. The Onstar audio and muting is on the harness.... either bring the audio in on an Aux, or use a PAC adaptor for non Class2 Vehicles. Gus Wherever I go, that is where I end up......

The 2005 Blazer/Jimmy are Class II data radios. You can purchase a interface module that will allow chimes and Onstar to work with your new radio. I like ones from Pheripheral as they also give your new radioi a switched source of accessory power. If you choose to use the radio relocate method, you need to run power ground and data to the original radio as well as all the wires in the radio harness 12 pin plug. You will also have to hook up a speaker to one of the factory radio's front speaker outputs to get Onstar audio.sparky