Review on Metra 99 3309B Single Double Installation by Ryan Vaughn

A lot of extra cables that are not even used. It literally comes with a tag in a separate bag that isn't even used, so why take it with you at all. Pretty horribly confusing guide that gives you labels for straps that aren't actually labeled on the straps themselves. You can also just use some of the main pictures/diagrams in the manual instead of verbal descriptions. Also, the only thing that stays in my car when things are on is the Onstar, which I don't even use. With connector for steering wheel control module, sold separately. I was hoping it would salvage the Aux/USB but it didn't either. Quite expensive for what you get in my opinion but there really aren't any other options so I guess you can take what you want.