PAC Radio Replacement Interface/SWR/Navigation Outputs for GÇÿ00 - GÇÿ13 GM Class II DataDesigned for GM vehicles using the Class II data bus from 2000 through 2013, the PAC Radio Replacement Interface with SWR and Navigation Outputs simplifies upgrading to an aftermarket radio while maintaining essential data and control signals. By tapping into the GM Class II data bus, it delivers the necessary SWR and navigation signaling to your new radio for a cleaner, more reliable install. Compatibility: Works with GM Class II data systems in