Manufacturer Part Number : 238TQ39. Application : GMC K1500 Drum Brake Wheel Cylinder. 1989 GMC K1500 Body: Extended Cab Pickup; Bore: 1.1875 In.; w/RPO Code JB5 (Power Brakes, Vacuum Boosted, Front Disc, Rear Drum) or w/RPO Code JD5 (Power Brakes, Hydraulically Boosted, Front Disc, Rear Drum); Position: Rear;.
