TG04 306 RPO DEFINITIONS JB5 BRAKE SYSTEM VACUUM POWER DISC DRUM V JB7 BRAKE SYSTEM VACUUM POWER DISC DRUM JB8 BRAKE SYSTEM HYDRAULIC POWER DISC DRUM JD5 BRAKE SYSTEM HYDRAULIC POWER DISC DRUM I I JD7 BRAKE SYSTEM HYDRAULIC POWER D SC DRUM LB4 ENG NE 4 3L 4 3Z V6 I LH6 ENGINE 6 2L 6 2C DIESEL V8 I LL4 ENG NE 6 2L 6 2J DIESEL V8 LO3 ENGINE 5 0L 5 0E V8 T B I LO5 ENGINE 5 7L 5 7K V8 DIG TAL FUEL INJECTION L19 ENGINE 7 4L 7 4N V8 T B L57 ENGINE DIESEL 8 CYL 6 5L HO R04 WHEELS SINGLE REAR I RO5 WHEELS DUAL REAR UJ I INDICATOR SYSTEM BRAKE WARNING 8Z I ENGINE DELETE FOR ELECTRIC VEHICLE 989 GOVERNOR ELECTRONIC SPEED SENSOR 70 MPH 9C2 GOVERNOR ELECTRONIC SPEED SENSOR 65 MPH L 1993 GENERAL MOTORS SERVICE PARTS OPERATIONS L GHT TRUCK 53G I2 93 4 T11 4 000 GROUP