I recently purchased a new Kenwood BT955HD head unit to install in my 98 grand prix. I've read in a lot of places that an adapter is required for the stock steering wheel controls to work, but then again, they also say a wiring harness is REQUIRED, even though you can get around buying one with a little intuition and a soldering iron. The unit has wires which state they are used for steering wheel control, and the only wires left from my old stock HU are two shades of green and one brown wire with a harness on the end. I've scoured Google for hours looking to see if it can be done, but I'm doubtful. Can anyone please weigh in on this for me?