Compatible with GM Full Size Trucks, SUVs and Vans have Cassette/CD players separate from the factory radios. Therefore if you are installing an aftermarket radio then you will also want this pocket. This pocket will install into the old Cassette/CD player spot, giving you a useful storage area. The kit is designed specifically for your vehicle, it lines up with factory mounting to install and uninstall easily. Assembly is required. Top piece attaches to bottom pieces with the included pack of four screws.