TX05 048 A RPO DEFINITIONS JB8 BRAKE SYSTEM HYDRAULIC POWER DISC DRUM GAS DIESEL ENG NE ROTOR 12 5 X1 54 REAR BRAKE SHOE 13 X3 5 JB8 BRAKE SYSTEM HYDRAULIC POWER DISC DRUM JD7 BRAKE SYSTEM HYDRAULIC POWER DISC DRUM IDIESEL ENG NE ROTOR 12 5 X I 28 REAR BRAKE SHOE 13 X2 5 JD7 BRAKE SYSTEM HYDRAULIC POWER DISC DRUM LB4 ENG NE 4 3L 4 3Z V6 A LL4 ENGIN E 6 2L 6 2J DIESEL V8 A LST ENGINE 3 9L 3 9L D ESEL 4 CYL CUMMINS LO5 ENGINE 5 7L 5 7K V8 DIGITAL FUEL INJECTION L19 ENGINE 7 4L 7 4N V8 T B I MT1 TRANSM SSION AUTO 4 SPD THM R2 4L80 MT8 TRANSMISSION MANUAL 5 SPD NEW PROCESS M20 TRANSMISSION MANUAL 4 SPEED MUNC E I 5R4 CHASSIS PACKAGE 110 INCH WHEEL BASE LOW PROFILE t 1992 GENERAL MOTORS SERVICE PARTS OPERATIONS LT TRUCK 53P 9 92 5 31 A 5 000 GROUP