“2011 Chevy Cruze LTZ with Pioneer 9 speaker system compatible? I have a MY 2011 Chevy Cruze that has the Pioneer 9 speaker upgrade package. I have purchased this stereo and am curious if I will lose function of some of the speakers? The product detail say steering wheel control capable so I will also need that adapter? I priced out some of these things on crutch field and the needed plugs exceed the cost of the stereo. Do you have alternatives to this?”