I just got a base 2006 LS Sedan to save on gas, got rid of two older suvs on the trade, and it only came with fm/am. I have an old Alpine head unit I was gonna put in but I have to get the din kit and wire harness or so I thought. I was in Best Buy to pick up a new vacuum since the other one died and happened to mention it to the "radio specialist" in the car stereo section. He said there's only two harnesses one is like $124

and the second one you have to hard wire the red power wire to the ignition switch or it won't turn off. I asked him how that's possible since the factory wire harness I've already looked at in the dash doesn't have anything extra for that on it. He said maybe it's through the car's computer or something, ie he really had no clue but wanted to give an answer anyway.
Anybody swapped out head units for aftermarket and what was your experience with the wire harness b/c I found a great deal on ebay for like $20 it's the din kit and wire haness thrown in.
Here's a link
http://cgi.ebay.com/CHEVY-AVEO-04-06...ayphotohosting
I've done quite a few installs and never had to tie to the ignition switch when using the factory wire harness. My other option is to buy somebody's used CD/mp3 head unit for this car. I've seen those on ebay too for around $30-50 but I have a head unit and would rather not buy another one. Any help you can offer would be greatly appreciated. Thanks