OEM INTERCHANGE PART NUMBER 2: 18029874. C1500 LS 8 CYL 5.0L 1999 WITH BRAKE CODE JB5, JB6, WITHOUT MASTER CYLINDER. C1500 LS 8 CYL 5.7L 1999 WITH BRAKE CODE JB5, JB6, WITHOUT MASTER CYLINDER. K1500 LS 8 CYL 5.0L 1999 GAS, WITH BRAKE CODE JB5, JB6, WITHOUT MASTER CYLINDER.