completed the install on my 2005 Pontiac Grand Am. Made the installation and wiring hookup painless. All the wiring matched up just as it should, everything worked right the first time. Don't even think about trying to get away without this. Worth every penny.
Don't forget to get a GM Universal antenna connector though. Nothing I read mentioned I would need it. When I discovered the need my local walmart was out of stock and I had to pay double the cost for one at a car stereo shop. FYI