OER Parts offers a wide selection of Rear End Components for your 1966 GMC 1500. OER Parts offers 1966 GMC 1500 Axle Shafts & Parts, 1966 GMC 1500 Differential, 1966 GMC 1500 Differential Covers, 1966 GMC 1500 Differential Hardware, 1966 GMC 1500 Differential Tools, 1966 GMC 1500 Driveshaft, 1966 GMC 1500 Driveshaft Safety Loops, 1966 GMC 1500 Gaskets & Seals, 1966 GMC 1500 Performance Rear Ends, 1966 GMC 1500 Ring & Pinion Gears, and 1966 GMC 1500 U-Joints and Parts.