Yes, your steering wheel controls should work with aftermarket head units. They're wired into the stereo and should work regardless.
At worst you'll need an adapter. Check out http://www.soundgate.com/index.php?request=product.details&categoryid=172&productid=446&usereferrer=1.Silverfox said:Yes, your steering wheel controls should work with aftermarket head units. They're wired into the stereo and should work regardless.