BODY MOUNTING AIR COND INSTRUMENTS GMC GROUP 9 275 Con 73 78 CK 1 2 Sub w roof mounted A C 069 74 78 G 1 2 3 w roof mounted A 0 069 328239 1 12 55 SWITCH ASM evap and blower 26 1014 74 77 G l 2 3 w A C 9343126 1 8 55 SWITCH ASM board car heater and a c 26 1890 74 77 0K 1 2 3 Blazer Jimmy w A C 340428 I l5 75 SWITCH ASM a c vac 28 1014 74 78 CKG I 2 3 Blazer Jimmy w A 0 339848 I 13 35 SWITCH ASM a c comp cut off pressure 26 1890 74 78 G I 2 3 w root mounted A C 370809 I 7 35 SWITCH ASM a c blower motor 26 1890 78 G1 2 3 w aux heater 370809 I 7 35 SWITCH ASM aux heater cont 26 1890 76 77 CK I 2 3 Blazer Jimmy w A C 470333 1 15 45 SWITCH ASM vacuum 26 1890 76 78 CK I 2 3 Blazer Jimmy w A C 3039429 1 27 55 SWITCH ASM thermostatic electric capillary 26 1257 78 G1 2 3 16015266 1 5 90 SWITCH ASM blower 26 1257 78 0K 1 2 3 w A C C60 470333 I 15 45 SWITCH ASM car htr and A 0 vac 26 1890 76 77 G l 2 3 w A C 1223590 1 N L SWITCH ASM blower 26 1257 78 GI 2 3 w A C C60 16001570 I 3 39 SWITCH ASM select rotary 4 terminal selector sw 26 1890 78 CKI 2 3 w A C C60 lst Des 3039429 l 27 55 SWITCH w rherm elec type cycling 26 1890 78 0KI 2 06 w A C C69 78 G1 2 3 w A C 089 328239 I 12 56 SWITCH a c bio mtr 26 1890 78 CK1 2 3 w A 0 060 469368 1 4 60 SWITCH car htr a c cont fan Note 1 4 terminal 78 CK1 2 3 w A 0 C60 3041336 1 N L SWITCH w 0 ring pkg press 26 1867 78 G1 2 3 w A C C60 3034513 1 22 65 SWITCH ASM therm elec 26 1257 9 276 BRACKET CONNECTOR HARNESS ASM WIRE Air Conditioning Electrical NOTE 1 It may be necessary to remove 14 gauge brown wire from heater switch conn body and install conn body from old harness for heater switch conn Tape back remaining unused wires NOTE 2 1st des 1977 has two connecting bodies that plug onto high blower relay 2nd desmn 1977 has one NOTE 3 For lst design 1978 identified by A C system temp control switch mounted on evaporator inlet pipe support bracket lor 2nd design 1978 it is mounted near top of accum bottle 73 78 M H C 3031971 1 110 00 HARNESS ASM A 0 evap wiring 7 8205H 73 74 CK 1 2 3 Blazer Jimmy w A C 8906014 I 60 75 HARNESS ASM A C wiring 7 8205H 74 77 G I 2 3 w A C 8913153 1 213 00 HARNESS ASM a c wiring 7 8205H 75 76 CK 1 2 3 Blazer Jimmy w A C 12001043 I 110 00 HARNESS ASM a c wiring 7 8205H 76 77 G1 2 3 w roof mounted A C 12001107 1 222 00 HARNESS ASM A C wiring 77 CK 1 2 3 Blazer Jimmy w A 0 1st des 12001099 I 104 00 HARNESS ASM a c wiring Note 2 7 8205H 77 CKI 2 3 w A C C60 2nd des 78 CK1 2 3 w A C 060 lst des 12001165 I 104 00 HARNESS a c wrg Note 2 3 7 8205H 78 GI 2 3 w A C C69 12001176 I 38 50 HARNESS a c ext wrg 7 8205H 78 CKI 2 3 2nd Des 12012615 I 59 50 HARNESS A 0 wrg Note 3 7 8206 10 73 78 CK 1 2 3 Blazer Jimmy 6268028 I 2 80 BRACKET w cam A C recirculating valve actu 26 1640 74 78 CK1 2 06 w A C 089 2984628 1 44 CONNECTOR a c blo mtr ext wire 2 530 7 8194A 4 75 78 M H C 3013674 I 3 80 WIRE ranco valve to blower switch 7 8194 78 G1 2 3 w A C 060 12001235 1 18 90 WIRE a c cmpr ext 7 8194 78 G1 2 3 w A C CBO 12001236 I 18 90 WIRE A C cmpr ext 7 8194 78 G1 2 3 w A 0 CBO C69 12001298 1 18 90 WIRE A C harness 7 8194 9 277 BREAKER ASM RELAY ASM Air Conditioning Electrical 73 76 CKG 1 2 3 Blazer Jimmy 76 77 CK 1 2 3 Blazer Jimmy 1115868 1 19 50 RELAY ASM A C wiring A C and heater blower motor cut out 7 7340 WAREHOUSING AND DISTRIBUTIONDIVISION 0F GENERAL MOTORS CORPORATION LT TRU0l 5I REV 2 83 me 9 275 9 277