cmos uso 19 9 172 SWITCH FAN IKIT INCLS 18 20 l I I 20 9 172 RETAINER SWRR CMPR I ID 21 9 178 VALVE PRESS REL I V 22 8 927 O RING RELIEF VALVE 1 23 9 188 KEY CLUTCH HUB 24 9 170 O RING CYL DISCHARGE 1 25 9 170 SEAL KIT SHAFT BEGINNING W 1984 2ND DES 2 I NOTE 1 GROUP 9 175 RING SEAL KIT 2724281 INCLUUDES 9 14 18 22 24 I NOTE 2 1ST DES 6599114 USED IN ALL MODELS PRIOR TO 1984 1984 ASM NUMBERS 1131400 1131407 1131409 1131413 2ND DES 2724319 USED IN ALL OTHER 1984 ASSEMBLIES LATER Q 1991 GENERAL MOTORS SERVICE PARTS OPERATIONS BUICK 44N 9 000 GROUP 9 12 I 2491