4 IV GM04 255 I A 1982 86 B G BRAKE BOOSTER VACUUM DUAL DIAPHRAGMNMORAINE A I 1987 B BRAKE BOOSTERNACUUM DUAL DIAPHRAGMMMORAINE A 30 RETAINER 1 4 Q N S 31 0 RING 1 4 N S 32 ROD ASM Air Valve Push 1 4 N S 33 PISTON P0wer 1 6 N S See CHART in group forusage L NOTE 1 SERVICE PWR BOOSTER Group 4 901 lncls 1 Thru 33 NOTE 2 PWR BOOS REPAIR KIT Group 4 898 lncls 1 Thru 8 14 15 16 18 20 22 27 28 29 NOTE 3 VALVE GROMMET Group 4 955 lncls 3 4 NOTE 4 AIR VALVE PLUNGER VLV Group 4 918 lncls 2 24 26 Thru 32 NOTE 5 VACUUM SWITCH KIT Group 4 918 lncls 5 6 NOTE 6 PISTON KIT Group 4 922 lncls 22 23 24 25 33 2 NOTE 7 BOOTREPAIR KIT Group 4 940 lncls 1 2 24 i r L A 1 199O GENERAL MOTORS SERVICE PARTS OPERATIONS PONT AC 22W 6 90 4 149 S I r 4 000 GROUP