i am looking to upgrade my radio and all speakers in the car doors and tweeters, subwoofer will have to wait since i can't decide on that.
but what my real question. is there any one harness that will retain the onstar, xm, steering wheel controls, chimes, and backup up park assist. or do you need multiple.
but what my real question. is there any one harness that will retain the onstar, xm, steering wheel controls, chimes, and backup up park assist. or do you need multiple.