A A TX04 0587 I 1988 1990 ST BRAKE BOOSTERNACUUM DUAL DIAPHRAGM JM3 JM5 MORAINE 1 4 659 BOOT POWER BRAKE BOOSTER 1 2 18012140 2 N S SILENCER 1 2 5 3 N S VALVE VAC CHK 1 2 4 4 N S GROMMET CHK VLV 1 2 4 I I 5 N S PUSH ROD ASM AIR VLV 1 5 6 N S PISTON PWR 1 3 I 7 N S SEAL FRT HOUSING 1 2 8 N S BEARING PISTON 1 2 I 9 N S HOUSING RR 1 4 10 N S HOUSING FRT 1 2 11 N S SPRING RETURN 1 12 4 924 ROD VAC PWR BOOS PSTN I L 5489384 13 N S RETAINER REACTION 1 L 14 N S I SILENCER PWR HEAD 1 2 15 N S RETAINER DIAPHRAGM 1 2 I 16 N S DIAPHRAGM PWR PISTON 1 2 17 N S PLATE PRIMARY SUPT 1 18 N S BEARING SECONDARY PSTN 1 2 19 N S DIVIDER HOUSING 1 20 N S DIAPHRAGM SECONDARY 1 2 21 N S PLATE SECONDARY SUPT 1 V 22 N S DISC REACTION 1 2 3 Y 23 N S PISTON REACTION 1 3 24 N S RETAINER REACTION BODY 1 3 5 I e 25 N S BODY REACTION 1 3 I 26 N S SPRING AIR VLV 1 5 27 N S BUMPER REACTION 1 5 28 N S RING RETAINING 1 5 29 N S FILTER 1 2 5 30 N S RETAINER 1 5 31 N S O RING 1 5 4 32 2 SEE SERVICE NOTES BELOW NOTE 1 BOOSTER PWR BRK 4 901 INCL ITEMS 1 31 18014925 ST1 W JM3 18014955 ST1 W JM5 NOTE 2 V REPAIR KIT PWR BOOS 4 898 INCL ITEMS 1 4 7 8 14 16 18 20 22 29 18014494 ST1 I f W JM3 18014481 ST1 W JM5 r 1990 GENERAL MOTORS SERVICE PARTS 0PERAT 0NS LIGI IT TRUCK 52S 10 90 I 4 115 I 1 4 000 GROUP