I 3 A I 21 I K I Q QJ 2 I L 1 QI I 8 Y eY wx 1 l 1 8 y Q ix A Wh Y Y T V A U A 19 12 H I 22 y 1 I 14 I 6 I i 7 I 33 is V I A 31 I 27 X 28 K Q I J I 29 X wz J V I 1 10 DM5189E121 I I V I I GM04 255 1982 1987 A BRAKE BOOSTER VACUUM DUAL DIAPHRAGMKDELCO NOT E SEE PARTS CATALOG FOR POWER BOOSTER CHART IN GROUP 4 901 1 1 N S BOOT ONLY SERVICED 1987 AND LATER 1 2 7 A 2 N S SILENCER 1 2 4 7 I 3 N S VALVE VAC CHK 1 2 3 4 N S GROMMET 1 2 3 A 5 I N S SWITCH VAC SOME MODELS 1 2 5 6 N S GROMMET 1 2 5 7 N S SEAL FRT HSG 1 2 I 8 N S BEARING PRIM PSTN 1 2 9 N S HOUSING RR 1 I 10 N S HOUSING FRT 1 1 1 N S SPRING RTN 1 I 12 4 924 ROD VAC P WR BOOS PSTN 1 I 13 N S RETAINER REACTION 1 14 N S SILENCER PWR HD 1 2 4 15 N S RETAINER DIAPH 1 2 16 N S DIAPHRAGM PRIM 1 2 17 N S PLATE PRINI SUPT 1 18 N S BEARING PSTN SECD 1 2 19 N S DIVIDER HEiG 1 20 N S DIAPHRAGM SECD 1 2 21 N S PLATE SUP T SEC 1 I 22 N S DISC REACTION 1 2 6 23 N S PISTON REACTION 1 6 I 24 N S RETAINER I3ODY REACTION 1 4 6 7 25 N S BODY REACTION 1 6 26 N S SPRING AIFI vLV 1 4 27 N S BUMPER RIEACTION 1 2 4 28 N S RING RETAlNING 1 2 4 1993 GENERAL MOTORS SERVICE PARTS OPERATIONS BUICK 44A t 1 4 93 4 141 4 000 GROUP