I v 1 I I W I GMO g 55a 1 I 0808 1 21 g I I I 2 20 I I I 5 R Q I 1 1 2 1 I1 V 1 Q V Eta A 1 8 xii 18 1 3 1 1 1 1 1 1 I I 17 I sig 12 1 I 19 1 1 13 1 fl 1 1 16 Q 1 vmx 1 zz gy J I 1 I I 14 1 1 I I 15 1 5 7 1 33 27 A y 1 26 I 31 27 1 18 R 1 32 B I R W 1 Y 3 1 6 L 1 1 Paw lx 1 I 29 I 1 J 1 I 11 w Ms1 9E121 1 1 1 I v GM04 255 I 1 I I 1985 11987 N BRAKE BOOSTERNACUUMIDUAL DIAPHRAGM MORAINE NOTE SEE CHART IN GROUP FOR USAGE 1 N S BOOT 1 2 7 1 1 1 2 N S SILENCER 1 2 4 1 3 N S VALVE VACUUM CHECK 1 2 3 1 1 4 N S GROMMET 1 2 3 1 1 5 N S SWITCH VACUUM SOME MODELS 1 Z2 Ei L 16 N S GROMMET 2 5 1 7 N S SEAL FRT HOUSING 1 2 8 N S BEARING PRIM PISTON 1 2 4 1 9 N S HOUSING RR 1 1 1 1 10 N S HOUSING FRT 1 1 4 1 111 N S SPRING FIETURN 1 1 12 4 924 ROD VAC PWR BOOS PISTON 1 1 13 N S RETAINER REACTION 1 14 N S SILENCER POWER HEAD 1 2 4 1 15 N S RETAINER D APHR AGM 1 2 1 16 N S DIAPHRAGM PRIM 1 2 1 17 N S PLATE PRIM SUPPORT 1 1 1 18 N S BEARING PISTON SECD 1 2 1 1 18 1 N S DIVIDER HOUSING 1 1 V 20 N S DIAPHRAGM SECD 1 2 1 21 N S PLATE SUPPORT SECD 1 1 22 N S DISC REACT ON 1 2 6 23 N S PISTON REACTION 1 6 24 1 N S RETAINER BODY REACTION 1 4 6 1 25 N S BODY REACTION 1 6 Q 1 26 1 N S SPRING AIR VALVE 1 4 1 1 27 N S BUMPER REACTION 1 2 4 1 1 28 N S RING RETAIN NG 1 2 4 V 1991 GENERAL MOTORS SERVICE PARTS 0PERATIONS BUICK 44N 1 2 91 1 1 4 55 1 4 000 GROUP