Car Wiring Diagrams for Manual a/c circuit for GMC Sierra III facelift (2015-2018)

5-VOLT REFERENCE AIR TEMP DOOR CTRL LOW REF AMBIENT LIGHT/SUNLOAD SENSOR (TOP CENTER OF DASH) ANTI-THEFT SYSTEM AUXILIARY HEATER CTRL AUXILIARY HEATER STATUS SIG BATT POSITIVE BATT POSITIVE VOLT BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BLOWER MOTOR BLOWER MTR BLOWER MTR SPD CTRL BLU/BRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DEFOGGER SYSTEM ELECTRIC VARIABLE DISPLACEMENT CTRL ELECTRIC VARIABLE DISPLACEMENT SPLY EXCEPT BASE EQUIPMENT BASE EQUIPMENT FRT BLWR FUSE GRN WIRE GRN/YEL WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/RED WIRE HEADLIGHTS SYSTEM HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED HVAC CONTROL MODULE (BEHIND UPPER GLOVE BOX) HVAC/AUX HVAC IGN FUSE INSTRUMENT PANEL JUNCTION BLOCK IPC FUSE LEFT INSTRUMENT PANEL FUSE BLOCK LINEAR INTERCONNECT NETWORK BUS 9 LOGIC LOW SPEED GMLAN SERIAL DATA PEPS/HVAC FUSE REAR DEFOG RLY CTRL RED/GRY WIRE RED/VIO WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK RUN/CRANK IGN 1 VOLT SIG GND SPD CTRL VIO WIRE VIO/GRY WIRE VOLT WHT/BLU WIRE YEL/DK GRN WIRE

6.0L 6.6L A/C COMPRESSOR A/C COMPRESSOR CLUTCH A/C COMPRESSOR SOLENOID VALVE AIR INLET DOOR ACTUATOR AMBIENT AIR TEMPERATURE SENSOR BATTERY FUSE BLOCK BLK WIRE BLK/BLU WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRN/GRN WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY ELECTRICAL AUXILIARY HEATER ENGINE COOLANT LEVEL SWITCH ENGINE COOLANT TEMPERATURE GAUGE EXCEPT BASE EQUIPMENT BASE EQUIPMENT FUSE 1 GRN WIRE GROUND DISTRIBUTION SYSTEM GRY/GRN WIRE GRY/RED WIRE GRY/VIO WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER INSTRUMENT PANEL JUNCTION BLOCK LEFT AIR TEMPERATURE DOOR ACTUATOR LEFT MODE DOOR ACTUATOR LOGIC TEMP TEMP SENS SENS LOW SIG REF LOW COOLANT LEVEL IND MOST SERIAL DATA (+) RED/GRY WIRE VIO WIRE VIO/GRN WIRE VIO/GRY WIRE WHT WIRE WHT/GRN WIRE WHT/LT GRN WIRE YEL/BLK WIRE YEL/BRN WIRE YEL/DK GRN WIRE

A/C EVAPORATOR TEMPERATURE SENSOR A/C IND A/C SWITCH AIR TEMP DOOR CONTROL AIR TEMP DOOR POSITION SIG BLK WIRE BLK/YEL WIRE BLU WIRE BLU/BRN WIRE BLU/YEL WIRE BRN/GRN WIRE COMPUTER DATA LINES SYSTEM DEFROST IND DEFROST SWITCH DEFROST, LOWER AIR OUTLET IND DEFROST, LOWER AIR OUTLET SWITCH DUCT LEFT LOWER AIR TEMPERATURE SENSOR DUCT LEFT UPPER AIR TEMPERATURE SENSOR DUCT RIGHT LOWER AIR TEMPERATURE SENSOR DUCT RIGHT UPPER AIR TEMPERATURE SENSOR EVP CORE TEMP SENS SIG GMLAN GRN WIRE GRN/YEL WIRE GRY WIRE GRY/GRN WIRE HVAC CONTROL MODULE (BEHIND UPPER GLOVE BOX) INFO DISPLAY MODULE LOGIC LOWER AIR OUTLET IND LOWER AIR OUTLET SWITCH LOWER LEFT AIR TEMP SENS SIG LOWER RIGHT AIR TEMP SENS SIG MODE 1 VALVE POSITION SENSOR SIG MODE DOOR CONTROL REAR DEFOGGER IND REAR DEFOGGER SWITCH RECIRCULATION DOOR CONTROL RECIRCULATION DOOR POSITION SIG RECIRCULATION IND RECIRCULATION SWITCH RED WIRE RED/GRY WIRE SENS LOW REF START/ STOP SWITCH TEMPERATURE CONTROL SWITCH UPPER AIR OUTLET IND UPPER AIR OUTLET SWITCH UPPER LEFT AIR TEMP SENS SIG UPPER RIGHT AIR TEMP SENS SIG UPPER, LOWER AIR OUTLET IND UPPER, LOWER AIR OUTLET SWITCH VENTILATION FAN SWITCH VIO/GRN WIRE W/ ELECTRIC REINFORCED HEATING/DEFROSTER SYSTEM W/O ELECTRIC REINFORCED HEATING/DEFROSTER SYSTEM WHT WIRE WHT/GRN WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE

4.3L/ 5.3L 6.0L 6.0L 6.6L A/C CLUTCH RLY CTRL A/C COMPRESSOR CLUTCH RELAY A/C PRESS 5 VOLT REF 1 A/C REFRIGERANT PRESS SENS LO REF A/C REFRIGERANT PRESS SENS SIG A/C REFRIGERANT PRESSURE SENSOR AC CLTCH FUSE AMBIENT AIR TEMP SENS LOW REF AMBIENT AIR TEMPERATURE SENSOR AMBT AIR TEMP SENS SIG B+ VOLT BATT POS VOLT BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/WHT WIRE BLU WIRE BLU/GRY WIRE BLU/VIO WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM COOL FAN 1 FUSE COOL FAN 2 FUSE COOL FAN CLTCH FUSE COOLING FAN 5 VOLT REF COOLING FAN CONTROL MODULE (6.6L) COOLING FAN LOW REF COOLING FAN RELAY COOLING FAN SPEED SIG CTRL SIG DK BLU WIRE DK BLU/GRY WIRE ENG COOLANT TEMP SENS SIG ENGINE CONTROL MODULE ENGINE CONTROLS IGNITION RELAY ENGINE COOLANT TEMPERATURE SENSOR GRN WIRE GRY WIRE GRY/RED WIRE HI COOLING FAN RLY CTRL HI SPD COOLING FAN RLY CTRL HI SPD GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES LEFT COOLING FAN MOTOR (4.3L, 5.3L) LO REF LOGIC B+ LOW REF MIRROR AMBIENT AIR TEMPERATURE SENSOR PASSENGER OUTSIDE REAR VIEW MIRROR RED/BRN WIRE RED/GRY WIRE RED/WHT WIRE RIGHT COOLING FAN MOTOR (4.3L, 5.3L) RLY SPD SIG SIG GND OUTSIDE AMBIENT AIR SENS SIG OUTSIDE AMBIENT AIR TEMP SENS LOW REF SPD SIG TCM/ECM FUSE UNDERHOOD FUSE BLOCK WHT WIRE WHT/BLK WIRE WHT/GRY WIRE