Castle AutoPlex McHenry is a twenty-two acre new and pre-owned dealership on Route 31 between Crystal Lake and McHenry. Castle AutoPlex McHenry has provided the parts, service and sales needs of Buick, GMC, Chevrolet, Cadillac, Subaru, Kia & Mitsubishi owners in McHenry County for over 30 years. Castle AutoPlex McHenry carries over 1500 vehicles in inventory and has a fully operating 68 bay service facility.