Steering wheel controls
If the headunit supports a wired remote (port on back of headunit), you can get the wired version of the PAC SWI-?. (I put a ? there because there are different models for different headunits units)
Here are the ones I found on Crutchfield:
PAC SWI-ALP - Alp/JVC/Ken/Blau
PAC SWI-ECL - Eclipse
PAC SWI-PS - Pioneer and Sony
Otherwise, you can use a PAC SWI-X which is the universal IR version that works with most headunits that have use an IR remote.
I have a Pioneer AVIC-D3 headunit and use a PAC SWI-PS to retain the steering wheel controls.




