4 l I TX04 1421 SERVICE KITS I KIT 2 4 649 PISTON KIT BRK M CYL INCLS ACT PSTN 91 P3 JF9 1 15664774 FIINGS SEALS SPR SOLD AS ASM NCLS ITEMS 5 8 4 649 PISTON KIT BRK M CYL INCLS CUP BOLT 91 P3 JB8 JD7 1 14071887 PSTN PROTR RETS SEAL SPR KIT 15536126 INCLS ITEMS 5 8 4 653 RPO DEFINITIONS JB7 BRAKE SYSTEM VACUUM POWER DISC DRUM GAS ENGINE ROTOR 12 5 X1 28 REAFI BRAKE SHOE 13 X2 5 JB8 BRAKE SYSTEM HYDRAULIC POWER DISC DRUM GAS DIESEL ENG NE ROTOR 12 5 X1 54 REAR BRAKE SHOE 13 X3 5 JD7 BRAKE SYSTEM HYDRAULIC POWER DISC DRUM DIESEL ENGINE ROTOR 12 5 X1 28 REAR BRAKE SHOE 13 X2 5 A I JF9 BRAKE SYSTEM HYDRAULIC POWER 4 WHEEL DISC I I 1992 GENERAL MOTORS SERVICE PARTS OPERAT ONS LT TRUCK 53P 1i I 4 000 GROUP 4 88 I I 9 92