I GM04 255 29 N S FILTER 1 2 4 30 N S RETAINER 1 4 31 N S O RING 1 4 32 N S ROD ASM AIR VLV PUSI I 1 4 33 N S PISTON PWR 1 6 4 NOTE 1 SERVICE PWR BOOSTER GROUP 4 901 INCLS 1 THRU 33 NOTE 2 PWR BOOS REPAIR KIT GROUP 4 898 INCLS 1 THRU 8 14 6 18 20 22 27 9 NOTE 3 VALVE GROMMET GROUP 4 955 INCLS 3 4 I NOTE 4 AIR VALVE PLUNGER VLV GROUP 4 918 INCLS 2 24 26 THRU 32 NOTE 5 VACUUM SWITCH KIT GROUP 4 906 INCLS 5 6 NOTE 6 PISTON KIT GROUP 4 922 INCLS 22 5 33 NOTE 7 BOOT REPAIR KIT GROUP 4 924 INCLS 1 2 24 I A 4 I I I A wal I I I I R U I 4 l sf T 1993 GENERAL MOTORS SERVICE PARTS OPERATIONS BUICK 44A 4 000 GROUP 4 142 4 93