V GM04 256 081085 25 4 5 V 8 J I 4 11 J 32 w I 14 15 5 J 9 gr 16 U A T 1 4 5 V 13 1 w 8 I x K 6 DI315OE1 1I I I GM04 256 I 1986 J VBRAKE BOOST ER VACUUM SINGLE DIAPHRAGM MORA NE 1 BOOT 1 1 2 11 8 10 PISTON ROD 1 11 Pwr B00s 1 N s 2 s1LE1 1cEn 1 1 n s 11 RETAINER R8acti0n 1 A N s 3 VALVE Vacuum Ch8ck 1 2 3 N S 12 FILTER 1 4 N S 4 GROMMET 1 2 3 5 N s 13 RETAINER oaapmagmv 1 2 I 1 1 s 8 sEAL En H0using 1 2 N s 14 1A1 1 IRAGM 1 2 11 8 I 6 BEARING Power Piston 1 2 N S 15 SUPPORT Diaphragm 1 I N S 1 1 eousmo R11 1 u s 16 POWER PISTON 8 PUSH 800 ASM 8 1 10us11 1G En1 1 N s 1 1 4 W 1 1 s 9 SPRING R8turn 1 N S 25 SWITCH Vacuum Some Models 1 A 2 5 1 1 s See Parts Catalog For POWER BOOSTER CHART At The End Of Group 4 000 I NOTE 1 SERVICE PWR BOOSTER Group 4 901 lncls 1 thru 25 NOTE 2 POWER 8008 REPAIR 1 1r Group 4 898 lncls 1 3 4 5 6 13 14 25 NOTE 3 VALVE GROMME71 Group 4 955 lncls 3 4 NOTE 4 PISTON KIT Group 4 922 lncls 12 16 I NOTE 5 VACUUM SWITCH KIT Group 4 906 lncls 4 25 i 1989 GENERAL MOTORS SERVICE PARTS OPERAT ONS BU CK 44 1 4 000 GROUP A I 4 66 5 I 10 89