1 1 GMM zsz gf 040987 V 9 i sg i I 1 i ii 11 I s 2 Q 9 r q r x 1 8 E1 R r 1 18 H 3 1 1 r x 2 V 17 i 12 I T I 19 9 l V 16 igsp 3 y i 1 22 I 1 1 J 14 I r 5 9 9 I 0 23 24 15 O 7 as 25 A j 26 4 31 w I 27 2 X Q 28 I 1 r 32 I E Q 4 3 Y V 1 1 10 DM7029E001 1 I I GM04 282 1988 89 J BRAKE BOOSTER VACUUM DUAL DIAPHRAGM MORAINE 1 BOOT 1 2 4 659 18 BEARING Piston Secd 1 2 N S 2 SILENCER 1 2 3 N S 19 DIVIDER Housing f 1 N S 3 VALVE Vacuum Check 1 2 4 N S 2 0 D APHRAGM Secd 1 2 N S 4 GROMMET 1 2 4 N S 21 PLATE Support Secd 1 N S 7 SEAL Frt Housing 1 2 N S 22 DISC Rea5 ti0n 1 2 5 N S 8 BEARING Primary Piston 1 2 N S 23 PISTON Reaction 1 5 N S 9 HOUSING Rear 1 N S 24 RETAINER Body Reaction 1 3 5 N S 10 HOUSING Frt 1 N S 25 BODY Reaction 1 5 N S 1 1 1 SPRING Return 1 N S 26 SPRING Air Va ve 1 3 N S 12 ROD Piston Gaged 1 4 924 27 BUMPER Reaction 1 2 3 N S 13 RETAINER Reaction 1 N S 28 A RING Retainer 1 2 3 N S 14 SILENCER Power Head 1 2 N S 29 FILTER 1 2 3 N S 15 RETAINER Diaphragm 1 2 N S 30 RETAINER 1 2 3 N S 116 DIAPHRAGM Primary 1 2 N S 31 O RING 1 2 3 N S 17 PLATE Primary Support 1 N S 32 ROD ASM Air Va ve 1 3 N S 1 33 PISTON Power 1 5 N S See CHART in Group for usage A 1 NOTE 1 Group 4 901 Senrice POWER BOOSTER lncls 1 thru 33 NOTE 2 Group 4 898 REPAIR KIT Pwr Booster lncls 1 thru 8 14 15 16 18 20 22 27 28 29 30 1 NOTE 3 Group 4 918 VALVE KI IZ Air lncls 2 24 26 thru 32 NOTE 4 Group 4 955 VALVE KIT W Grommet lncls 3 4 NOTE 5 Group 4 922 PISTON KITZ lncls 22 thru 25 33 t 1989 GENERAL MOTORS SERVICE PARTS OPERATIONS BU CK 44J 4 000 GROUP 4 10 1 0 89