The Replacement Knockout for GM Vehicles is the perfect solution for when the USB Hub (AUX - USB - SD card slot) cannot be retained when replacing the factory radio in GM vehicles. This solution replaces the entire hub with a new spacer/knockout that includes 2 female USBs - a female 3.5mm Auxiliary jack - and a female HDMI port. Also available in 3ft length. (see part AX-GMUSBAUX-3)
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