1990 GMC C2500. Notes: Parking Brake Cable -- 2655 mm Length; With RPO Code JB7 (Power Brakes, Vacuum Boosted, Front Disc, Rear Drum) or With RPO Code JD7 (Power Brakes, Hydraulically Boosted, Front Disc, Rear Drum, Diesel); Cables Attached to Pinion Gear Flange.