I GM04 250 0 081005 0 25 0 4 5 I s A S T 4 I 10 I I I I I 0 11 V 3 wi I 0 41 wx A 15 3 I I 9 K rv J 5 16 I h R N 0 13 I 2 I I I 1 6 DI 1IOE1 1I GM04 266 A 1987 G BRAKE BOOSTERNACUUM SINGLE DIAPHRAGM MORAINE 0 NOTE SEE PARTS CATALOG FOR POWER BOOSTER CHART AT THE END OF GROUP 4 000 1 N S BOOT 1 2 2 N S SILENCER 1 3 N S VALVE VACUUM CHECK 1 2 3 4 N S GROMMET 1 2 3 5 I 5 N S SEAL FRT HOUSING 1 2 6 N S BEARING POWER PISTON 1 2 7 N S HOUSING RR 1 8 N S HOUSING FRT 1 9 N S 1 SPRING RETURN 1 I 10 N S PISTON ROD KIT PWR BOOS 1 11 N S RETAINER REACTlON 1 12 N S FILTER 1 4 13 N S RETAINER D APHRAGM 1 2 14 N S DIAPHRAGM 1 2 A 15 N S SUPPORT DIAP HRAGM 1 0 16 N S POWER PISTON PUSH ROD ASM 1 4 1 25 N S SWITCH VACUUM SOME MODELS 1 2 5 NOTE 1 SERVICE PWR BOOSTER GROUP 4 901 INCLS 1 THRU 25 NOTE 2 POWER BOOS REPAIR KIT GROUP 4 898 INCLS 1 3 4 5 6 13 14 25 NOTE 3 VALVE GROMMET GROUP 4 955 INCLS 3 4 NOTE 4 PISTON KIT GROUP 4 922 INCLS 12 16 NOTE 5 VACUUM SWITCH KIT GROUP 4 906 INCLS 4 25 Y 1991 GENERAL MOTORS SERVICE PARTS OPERAT ONS BU CK 44W i I 6 91 4 121 4 000 GROUP