Fits: 2001 thru 2007 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7/LLY/LBZ Duramax Diesel The only receiver lock that will open with YOUR EARLY MODEL GM key, BOLT Receiver Locks feature a solid zinc core, automotive grade cylinder with patented 6 plate-tumbler sidebar to prevent picking and bumping, a stainless steel lock shutter to keep out dirt and moisture, and a rugged jacket and cap. BOLT Receiver Locks have a Stainless Steel 5/8 diameter shaft (fits class 3, 4 Hitch) and are made in the USA. Limited lifetime warranty. This 5/8" diameter receiver lock codes to your vehicle's ignition key. Made of automotive grade materials and nearly impossible to pick or bump, this corrosion-resistant lock helps keep your ball mount safe and secure. Features: Fits early GM models with early model thin groove double cut key Solid zinc core Stainless steel lock shutter Rugged jacket and cap Notes Thin Groove Double Cut Key Only
