Crux Radio Replacement Interface For Select '06-'22 Gm Lan 29 Bit Vehicles With Swc (with Dash Kit)CRUX Radio Replacement with SWC Retention and Dash Kit for GM LAN 29 Bit Vehicles 2006 2022 The CRUX DKGM 49 is a premium interface for select General Motors LAN 29 Bit Vehicles. It facilitates the integration of an after market radio to fully retain factory features in GM LAN 29 Bit vehicles with Bose Amplified and Non Amplified Systems. It also includes a double din dash kit replacement. This enhanced interface is also pre programmed for retention