Regarding the steering wheel controls. Good luck. I have a Monte Carlo 99 Z34. With those wonderful steering wheel controls. I went to the dealer and got the documents showing the electrical layout. I will comment, I am NOT an expert, so I could have read them completely backwards, but it looked as if all of those controls are run inline as resistors. Here is the part were I got concerned. It looks like the power lead that goes thru the wheel also takes a pit stop at the air bag. Then it connects back to the same circuit. It makes no sense to me. So I ordered the information from Delco on the radio. After much griping I got documentation. Not for my model... Grrr... I made a few phone calls and someone told me that it uses an encoding called M (something or another). so I couldn't just attempt to rig it up by the radio. Thus until I find further information. I'm giving up on hooking it to empeg or any other player.