Don't listen to the haters, its fast and easy!
you can't go wrong they are the same on 3rd & 4th gens, just give it some space between the ribs and you'll be fine. I've done it on 2 cars so far and not once have I had a problem. Just lift your rear carpet and its clear to see. Some of us just don't have the skill, knowledge or time to drop the rear and all that crap. When you lift the carpet you'll see these cars were designed to have an access panel, it probably just would have cost to much for GM to actually put on there.