OER Parts offers a wide selection of Rear End Components for your 1987 GMC R3500. OER Parts offers 1987 GMC R3500 Axle Shafts & Parts, 1987 GMC R3500 Differential, 1987 GMC R3500 Differential Covers, 1987 GMC R3500 Differential Hardware, 1987 GMC R3500 Differential Tools, 1987 GMC R3500 Driveshaft, 1987 GMC R3500 Driveshaft Safety Loops, 1987 GMC R3500 Gaskets & Seals, 1987 GMC R3500 Performance Rear Ends, 1987 GMC R3500 Ring & Pinion Gears, and 1987 GMC R3500 U-Joints and Parts.