Dorman Parking Brake Cable --. 93-94 K1500 Cheyenne Extended Cab Pickup, With Rear Drum, With RPO Code JB5 (Power Brakes, Vacuum Boosted, Front Disc, Rear Drum) or With RPO Code JD5 (Power Brakes, Hydraulically Boosted, Front Disc, Rear Drum); Without RPO Code F44 (Heavy Duty Chassis).