1 I GNIOQZSG 6 0B10 5 4 5 659 25 8 Ea 10 5 1 1 1 3 mx q 1 A J 14 O 15 I 9 12 I l l I 131 2 K V 1 6 u 1 t1 II GM04 256 1982 1987 G BRAKE BOOSTER VACUUM SINGLE DIAPHRAGM MORAINE 1 NOTE SEE PARTS CATALOG FOR POWER BOOSTER CHART AT THIE 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 5 N S SEAL FRT HOUSING 1 2 6 N S BEARING POWER P STON 1 2 J 7 N S HOUSING RR 1 8 N S HOUSING FRT 1 9 N s SPRING RETURN 1 10 N S PISTON ROD KIT PWR BOOS 1 11 N S RETAINER REAC I ION 1 12 N S FILTER 1 4 13 N S RETAINER D APHRAGM 1 2 14 N S DIAPHRAGM 1 2 15 N S SUPPORT DIAPHRAGM 1 16 N S POWER PISTON 81 PUSH ROD ASM 1 4 25 N S SWITCH VACUUM SOME MODELS 1 2 5 NOTE 1 SERVICE PWR BOOSTER GROUP 4 901 INCLS 1 THRU 25 A 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 6 I 1991 GENERAL MOTORS SERVICE PARTS OPER T 0NS CHEVROLET 17W 6 91 mss 4 000 GROUP