Don't believe anything you read about "ease of installation." The installation instructions are a JOKE! On my truck you either need to completely remove the dash or cut an access hole to access the GM passkey module. I chose to cut a hole in the inner plastic dash support, which isn't visible after the trim goes back on. So far, so good, it seems to have worked - but I spent about 8 hours on the installation. That might have been ok, except that they made it sound so easy on their website. They should have a huge disclaimer reading "some installations may be challenging or seemingly impossible."