I am looking to install a Pioneer FH-X700BT head unit in my 2007 Silverado. I have the harness for the steering wheel controls. I have on-star in the truck and no Bose, i do not care about keeping on-star but i am not sure if i need the harness for the chimes, Will this cause any other problems if i do not have it? If there are any other tips you guys would like to share a would appreciate it. I searched for the unit i am installing but did not have any hits. I am new here so if i may have overlooked something please let me know. Thanks all.