GM04 255 1 1 1 080885 21 v 1 20 1 I Im 5 1 2 cw 11 g Q I 12 Q 1 8 I 1 R 1 1 I rm1m 17 1 12 1 I 19 11 1 13 16 2 I 1 I 14 5 11 f1 2 I 1 Q 24 1 V 15 K 25 5 7 33 Q X 1 31 I 27 g 28 x 32 Q 4 3 I I sw I 29 Q V 10 11 DM51a9E121 1 1 1 GM04 255 1 1 1982 1987 J BRAKE BOOSTER VACUUM DUAL DIAPHRAGM DELCO NOTE SEE PARTS CATALOG FOR POWER BOOSTER CHAFIT IN GROUP 4 901 1 1 1 N S BOOT ONLY SERVICED 1987 AND LA I ER 1 2 7 V 2 N S SILENCER 1 2 4 7 3 N S VALVE VAC CHK 1 2 3 4 N S GROMMET 1 2 3 5 N S SWITCH VAC SOME MODELS 1 2 5 6 N S GROMMET 1 2 5 7 N S SEAL FRT HSG 1 2 8 N S BEARING PRIM PSTN 1 2 9 N S HOUSING RR 1 10 N S HOUSING FRT 1 11 N S SPRING RTN 1 12 4 924 ROD VAC PWR BOOS PSTN 1 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 PRIM SUPT 1 18 N S BEARING PSTN SECD 1 2 I 19 N S DIVIDER HSG 1 20 N S DIAPHRAGM SECD 1 2 I 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 7 25 N S BODY REACTION 1 6 26 N S SPRING AIR VLV 1 4 27 N S BUMPER REACTION 1 2 4 28 N S RING FIETAINING 1 2 4 t 1992 GENERAL MOTORS SERVICE PARTS OPEFIATIONS PONTIAC 22J 1 1 92 4 97 4 300 GROUP 1 222 2 I l i T