The 2004.5-2007 Crew Cab Long Bed 4WD Frame Harness for Chevy GMC 2500HD Duramax is a genuine GM part made in the United States. This specific harness is designed for these models and years, ensuring a precise fit for optimal performance. It is not a vintage part or a universal fitment, providing a reliable solution for upgrading or repairing your vehicle's frame. This high-quality frame harness is a crucial component for maintaining the structural integrity of your Chevy or GMC truck.