V 1 GM04 255 Z W osoaas 9 I 20 1 9 2 IV A Q I 8 A I 1 18 I 1 RKY x 17 V l 1 1 19 2 S X V I 14 A 1 5 R9 1 1 11 7 X5 5 24 5 7 I I V 31 27 I X 28 n 32 I I I I I1 z A 29 Q A V V V 11 10 DM5169E121 A GMV04 255 1986 1987 H BRAKIE BOOSTER VACUUM DUAL DIAPHRAGMKDELCO NOTE SEE PARTS CATALOG FOR POWER BOOSTER CHART IN GROUP 4 901 2 1 N S BOOT ONLY SERVICED 1987 AND LATER 1 12 7 2 N S SILENCER 1 2 4 3 N S VALVE VACUUM CHECK 1 2 3 4 N S GROMMET 1 2t 3 5 N S SWITCH VACULlM SOME MODELS 1 2 5 I 6 N S GROMMET 1 2 5 V 7 N S SEAL FRT HOUSING 1 2 8 N S BEARING PRIM PlSTON 1 2 E 9 N S HOUSING RR 1 10 N S HOUSING FRT 1 1 L 11 N S SPRING RETURN 1 12 4 924 ROD V AC PWR IBOOS PlSTON 1 13 N S RETAINER FIEACZT ON 1 14 N S SILENCER POWlER HEAD 1 2 4 15 N S RETAINER DIAPHRAGM 1 2 16 N S DIAPHRAGM PFIIM 1 2 17 N S PLATE PRIM SU PPORT 1 18 N S BEARING PISTON SECD 1 2 19 N S DIVIDER HOUSIlNG 1 20 N S DlAPHRAGM SEECD 1 2 21 N S PLATE SUPPOR Il ECD 1 22 N S DISC REACTION 1 2 6 23 N S PISTON REACTI DN 1 6 24 N S RETAINER BODY REACTION 1 4 6 25 N S BODY REACTION 1 6 26 N S SPRING AIR V LVE 1 4 I 27 N S BUMPER REACTlON 1 2 4 28 N S RING RETAlN NG 1 2 4 1992 GENERAL MOTORS SERVICE PARTS OPERATIONiS BUICK 44H 4 92 I I 4 125 4 000 GROUP