I I I I I I GMO4 255 I 080885 I 21 r 9 I wv I 1T I I I 1 i n J 2 X i 2 1 V 2 ga Q V x 1 I III KYPN vt 1 K I 1 17 1 1I 1 16 Q I3 22 y J 14 5 9 0 2s I I 15 5 7 33 ly j 26 I I 28 1 I 32 1 1 A 4 3 2 I 29 Q IX 11 I M 1eas121 I GM04 255 J 1982 1986 G BRAKE BOOSTERNACUUM DUAL DIAPHRAGMHMORAINER 1982 1987 B BRAKE BOOSTERNACUUM DUAL DIAPHRAGM MORAINE NOTE SEE PARTS CATALOG FOR POWER BOOSTER CHART IN GROUP 4 901 I 1 N S BOOT 1 2 7 I I 2 N S SILENCER 1 2 4 3 N S VALVE VACUUM CHECK 1 2 3 I 4 N S GROMMET 1 2 3 5 N S SWITCH VACUUM SOME MODELS 1 2 5 6 N S GROMMET 1 2 5 I 7 N S SEAL FRT HOUSlNG 1 2 I 8 N S BEARING PRIM PISTON 1 2 I 9 N S HOUSING RR 1 I 10 N S HOUSING FRT 1 I 11 N S SPRING RETURN 1 12 4 924 ROD VAC PWR BOOS PISTON 1 13 N S RETAINER REACTION 1 I 14 N S SILENCER POWER HEAD 1 2 4 15 N S RETAINER DIAPHRAGM 1 2 I 16 N S DIAPHRAGM PRIM 1 2 17 N S PLATE PRIM SUPPORT 1 18 N S BEARING PISTON SECD 1 2 19 N S DIVIDER HOUSlNG 1 20 N S DIAPHRAGM SECD 1 2 21 N S PLATE SUPPORT SECD 1 22 N S DISC REACTION 1 2 6 23 N S PISTON REACTION 1 6 24 N S RETAINER BODY REACTION 1 4 6 V 25 N S BODY REACTION 1 6 26 N S SPRING AIR VALVE 1 4 27 N S BUMPER REACTION 1 2 4 I i j 1991 GENERAL MOTORS SERVICE PARTS OPERATIONS BUICK 44W 6 91 4 119 4 000 GROUP