1 4GM04 255 080885 21 1 9 1 K vw 20 w X 1 gx QQ I MJ 2 Q 1 x 1 A X 1 V 8 I 18 1 x KK M xN 17 M 1 19 12 16 i Q 1 I 22 gy J M m 1 5 1 A 9 I 7 A 5 1 as x 2 Q 26 31 1 I 27 X 28 1 1 A 32 3 Q I 4 3 z 1 A 1 1 11 DM5169E121 A A VGMO4 255 1 1982 1987 A BRAKE BOOSTER VACUUM DUAL DIAPHRAGM DELCO NOTE SEE PARTS CATALOG FOR POWER BOOSTER CHART IN GROUP 4 901 A 1 N S BOOT ONLY SERVICED 1987 AND LATER 1 2 7 1 2 N S SILENCER 1 2 4 7 3 N S VALVE VAC CHK 1 2 3 4 N S GROMMET 1 2 3 J V 5 N S SWITCH VAC SOME MODELS 1 2 5 1 6 N S GROMMET 1 2 5 7 N S SEAL FRT HSG 1 2 8 N S BEARING PR M PSTN 1 2 Q 9 N S HOUSING RR 1 1 0 N S HOUSING F RT 1 11 N S SPRING RTN 1 1 12 4 924 ROD VAC PWR 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 PR M 1 2 17 N S PLATE P R M SUPT 1 18 N S BEARING PSTN SECD 1 2 19 N S DIVIDER HSG 1 20 N S DIAPHRAGM SECD 1 2 21 N S PLATE SUPT SECD 1 22 N S DISC REACTION 1 2 6 23 N S PISTON REACTION 1 6 24 N S RETAINER BODY REACT ON 1 4 6 7 25 N S BODY REACTION 1 6 26 N S SPRING AIR VLV 1 4 I 27 N S BUMPER REACT ON 1 2 4 1 28 N S RING RETAIN NG 1 2 4 1992 GENERAL MOTORS SERVICEPARTS OPERAT ONS 0LDSMOB LE 32A U 11 92 4 139 4 000 GROUP V