For 1987-1991 GMC R3500 Dorman Drum Brake Wheel Cylinder Kit 1988 1989 1990

1987 GMC R3500 w/Single Rear Wheel (SRW) | Bore: 1.0625 In.; Position: Rear Left;. 1987 GMC R3500 w/Single Rear Wheel (SRW) | Bore: 1.0625 In.; Position: Rear Right;. 1988 GMC R3500 w/Single Rear Wheel (SRW) | Bore: 1.0625 In.; Position: Rear Left;.