Y GMO4 255 1982 87 IJ BRAKE BOOSTER VACUUM DUAL DIAPHRAGMKMORAINE 31 O RING 1 4 N S 32 ROD ASM Air Valve Push 1 4 N S 33 PISTON P0wer 1 6 I N S See CHART in group for usage NOTE 1 SERVICE PWR BOOSTER Group 4 901 lncls 1 Thru 33 NOTE 2 PWR BOOS REPAIR KIT Group 4 898 lncls 1 Thru 14 75 16 I8 20 22 27 28 29 NOTE 3 VALVE GROMME7 Group 4 955 lncls 3 4 I NOTE 4 AIR VALVE PLUNGER VLV Group 4 918 lncls 2 24 26 Thru 32 I NOTE 5 VACUUM SWITCH KIT Group 4 918 lncls 5 6 NOTE 6 PISTON KITZ Group 4 922 lncls 22 23 24 25 33 A NOTE 7 BOOT REPAIR K T Group 4 940 lncls 1 2 24 YF I 7 j 1989 GENERAL MOTORS SERVICE PARTS OPERATIONS BUICK 4 4J 1 10 89 4 69 4 000 GROUP