2007-2012 GMC Acadia HID to Halogen Headlight Conversion Harness Pair. (WITH HID WIRE) Selling a a pair of brand custom conversion harness for 2007-12 GMC Acadia originally equipped with HID XENON To change to a HALOGEN headlight assembly. This will only work with cars originally with HID that now have halogen headlights being installed (either new OEM or aftermarket but for halogen applications).