COOLING SYSTEM GRIIILLEQIL SYSTEM 1 153 BCILT OUTII ET STUD Engine Coolant Con t 87 90 G1 2 3 4 32 3932368 1 51 STUD COOLANT OTLT 02 277 PGO 18 7 63 87 88 G3 350M 3993345 LH 78 STUD COOLANT OUTLET 03 275 PGO 50 9 88 90 G3 7 4N L19 7 4N 3932368 2 51 STUD WAT OTLT STUD COOLANT OUTLET 02 277 PGO 18 63 89 91 G1 2 3 5 0H L03 5 7K L05 10085606 2 57 STUD WAT OTLT 3 8 16X 62 3 8 16X 96 3 8 16XO 78 03 275 PGO 42 67 91 G3 7 4N L19 10166899 2 51 ISTUD WAT OTLT 02 277 PGO 74 63 1 154 GASKET Engine Coolant Outlet 85 86 G1 2 3 4 3N 2 10077105 1 68 GASKET COOLANT OUTLET PGO 9 9 85 86 G1 2 3 305F H 350L M K 10077105 1 68 GASKET COOLANT OUTLET PGO 9 9 85 91 G2 3 6 2C LH6 6 2J LL4 10137489 1 1 05 GASKET CLNT OTLT PGO 77 47 87 90 G1 2 3 EXC 6 20 I 10077105 1 68 GASKET COOLANT OUTLET PGO 9 9 91 G1 2 3 4 32 LB4 5 0H L03 5 7K LO5 7 4N L19 10077105 1 68 GASKET CLNT OTLT PGO 9 9 1 159 HOSE Radiator Inlet Upper NOTE INLET HOSE ARE USED BETWEEN TOP OF RADIATOR ENGINE COOLANT OUTLET OUTLE T HOSES GROUP 1 173 ARE USED BETWEEN BOTTOM OF RADIATOR AND CYLINDER BLOCK NOTE SOME HOSES HAVE BEEN REPLACED WITH HOSEEF DFA DIFFERENT LENGTH OR CO NFIGURATION THIS REPLACEMENT HOSE IN MANY INSTANCES WILL REQUIRE CUTTING USING OLD PART AS GUIDE 85 86 G1 2 3 305H F 350L M K 15598394 1 14 65 HOSE RAD INLET PG1 7 11 85 90 G1 2 3 4 3N LB I 4 32 LEI4 15599361 1 14 65 HOSE RAD NL PG1 7 11 85 91 G2 3 6 2C LH6 6 2J LL4 15597400 1 15 55 HOSE RAD INL PG1 7 11 87 88 G1 2 3 35OM 15598394 1 14 65 HOSE RAD INLET PG1 7 1 1 87 91 G1 2 3 5 0H L03 5 7K LCI5 15598394 1 14 65 HOSE RAD INL PG1 7 11 88 90 G3 7 4N 15556533 1 15 70 HOSE RAD INLET PG1 7 1 1 91 G1 2 3 4 32 LB4 15599361 1 14 65 HOSE RAD INL PG1 7 11 91 G3 7 4N L19 15656617 1 11 25 HOSE RAD INL PG1 13 6 1 166 CL AMP PROTECTOR STR AP Hose FIadiator Heater A C 85 86 G1 2 3 22518665 AR 50 CLAMP V ORM TYPE 56 T0 1 06 DIA PG3 39 3 85 88 G1 2 3 22518666 AR 89 CLAMP HEX HD WORM 33 3 TO 57 2MM PG3 42 3 85 90 G2 3 6 2C J 10093148 AR 1 25 CLAMP FUEL DRAIN BACK HOSE T W 14066305 10 155 PGO 81 20 85 88 G2 3 6 2C J 25518880 AR 45 CLAMP FUEL DRAIN BACK HOSE 250X 625 08 948 88 90 G2 3 6 2C J 22537533 2 70 CLAMP THERIVI BY PASS HOSE 08 9 48 PGO 70 78 89 G1 2 3 25527699 AR 1 50 CLAMP HEX HD WORM 33 3 TO 57 2MM 08 948 PG3 42 3 91 G1 2 3 4 32 LB4 AIR INJN REACTOR SYS K19 12338017 AR 1 45 CLAMP AIR INJN ENG CHK VLV HOSE 03 675 87 91 G1 2 3 14000217 1 B8 PROTECTOR RAD HOSE PG1 11 19 85 91 G1 2 3 5 0H LO3 5 7K L05 6 2C LH6 6 2J LL4 15522192 1 1 35 STRAP RAD HOSE PG1 7 44 1 173 HOSE Radiator Outlet Lower NOTE OUTLET HOSES ARE USED BETWEEN BOTTOIVI OF RADIATOR CYLINDER BLOCKJNLET HOSTES GROUP 1 159 ARE USED BETWEEN TOP OF RADIATOR 84 ENGINE COOLANT OUTLET NOTE SOME HOSES HAVE EIEEN REPLACED WITH HOSES OF A DIFFERENT LENGTH OR CO NFIGURATION THIS REPLACEMENT HOSE IN MANY INSTANCES WILL REOU RE CUTTING USING OLD PART AS GUIDE 85 86 G1 2 3 4 3N LB 1 15563424 1 12 05 HOSE RAD OTLT PG1 7 13 85 86 G1 2 3 305F H 350L II I K 15598395 1 12 05 HOSE RAD OUTLET PG1 7 13 85 91 G2 3 6 2C LH6 6 2J LL4 15595946 1 1205 HOSE RAD OTLT PG1 7 13 87 91 G1 2 3 4 32 LB4 15563424 1 12 05 HOSE RAD OTLT PG1 7 13 87 88 G1 2 3 35OM LT9 15598395 1 12 05 HOSE RAD OTLT PG1 7 13 87 91 G1 2 3 5 0H L03 5 7K I 05 15598395 1 12 05 HOSE RAD OTLT PG1 7 13 88 91 G3 7 4N L19 15556534 1 12 05 HOSE RAD OTLT PG1 7 13 1 203 CAP MODlJLE PROBE Radiator Filller 85 91 G1 2 3 6410785 1 N I CAP RAD FIL PG1 7 5 85 G2 3 6 2C J 6410949 1 5 97 CAP RAD SURGE TK 85 91 G2 3 6 2C LH6 6 2J LL4 15591138 1 14 80 MODULE LOW ENG COOL IND 85 91 G2 3 6 2C LH6 6 2J LL4 358375 1 3 70 PROBE LOW ENG COOLVIND 1 219 CORE GASKET KIT NUT IRADIATIOR TANK Engine Cooling NOTE REFER TO RADIATOR CHART FOR ADDITIONAL RELATED INFORMATION T 1991 GENERAL MOTORS SERVICE PARTS 0PIERATIONS LTTRUCK 52G 1 91 1 29 1 153 1 219