Provides plug-n-play connection and retention of the original equipped reverse camera Retains MOST50 data communication Male RCA video output connection Compatibility Requirements/Notes: The CAM-GM51 harness works on vehicles with the IO4, IO5 and IO6 RPO coded factory audio systems. The RPO codes can normally be found by looking at the sticker in the glove box or in the trunk under the spare tire cover panel. On 2018+ vehicles it may be necessary to scan a QR code with your phone or tablet to view the vehicles RPO codes. The CAM-GM51 harness connects at the Human Machine Interface Control Module (HMICM) not at the radio. The HMICM is normally found either behind the glove box in trucks and SUVs, or high in the passenger side kick panel area. The HMICM will have the USB and LVDS cables connected to it.