GMC Sierra IV (2018-2022) yel Wiring diagrams

A/C COMPRESSOR CLUTCH RELAY A/C EVAPORATOR TEMPERATURE SENSOR A/C IND A/C SWITCH AIR INLET DOOR ACTUATOR AIR INLET DOOR STEPPER MOTOR CTRL (1) AIR INLET DOOR STEPPER MOTOR CTRL 2 AIR INLET DOOR STEPPER MOTOR CTRL 3 AIR INLET DOOR STEPPER MOTOR CTRL 4 AIR TEMPERATURE DOOR CTRL LOW REF AUTO AUXILIARY HEATER COOLANT PUMP RELAY BATTERY FUSE BLOCK BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BRN WIRE BLU/GRY WIRE BRN WIRE BRN/GRN WIRE BRN/VIO WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM COOLING FAN RELAY DISPLAY ENGINE COOLANT FAN SWITCH ENGINE COOLANT TEMPERATURE 2 SWITCH EVAP CORE TEMP SENSOR SIG GRN WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT W/ ENGINE CONTROLS IGNITION RELAY ENERGIZED HVAC CONTROL MODULE (BEHIND UPPER LEFT SIDE OF DASH) HVAC CONTROLS HVAC MOTOR CONTROL LEFT AIR TEMPERATURE DOOR ACTUATOR LOGIC LOWER AIR LOWER AIR OUTLET SWITCH MAX WINDSHIELD DEFROST IND MAX WINDSHIELD DEFROST SWITCH MODE DOOR ACTUATOR MODE DOOR STEPPER MOTOR CONTROL (2) MODE DOOR STEPPER MOTOR CONTROL (4) MODE DOOR STEPPER MOTOR CONTROL 1 MODE DOOR STEPPER MOTOR CONTROL 3 OUTLET IND RED/GRY WIRE RED/WHT WIRE RIGHT AIR TEMPERATURE DOOR ACTUATOR START/ STOP SWITCH SYNC TEMP DOOR STEPPER MOTOR CONTROL 1 TEMP DOOR STEPPER MOTOR CONTROL 2 TEMP DOOR STEPPER MOTOR CONTROL 3 TEMP DOOR STEPPER MOTOR CONTROL 4 UNDERHOOD AUXILIARY FUSE BLOCK UNDERHOOD FUSE BLOCK UPPER AIR OUTLET IND UPPER AIR OUTLET SWITCH VIO/BLU WIRE VIO/GRN WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRY WIRE WHT/YEL WIRE WINDSHIELD DEFROST IND WINDSHIELD DEFROST SWITCH YEL WIRE YEL/BLK WIRE YEL/GRN WIRE

A/C COMPRESSOR CLUTCH RELAY A/C EVAPORATOR TEMPERATURE SENSOR A/C IND A/C SWITCH AIR INLET DOOR ACTUATOR AIR INLET DOOR STEPPER MOTOR CTRL (1) AIR INLET DOOR STEPPER MOTOR CTRL 2 AIR INLET DOOR STEPPER MOTOR CTRL 3 AIR INLET DOOR STEPPER MOTOR CTRL 4 AIR TEMPERATURE DOOR CTRL LOW REF AUXILIARY HEATER COOLANT PUMP RELAY BATTERY FUSE BLOCK BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BRN WIRE BLU/GRY WIRE BRN WIRE BRN/GRN WIRE BRN/VIO WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM COOLING FAN RELAY ENGINE COOLING FAN SWITCH ENGINE COOLING TEMPERATURE SWITCH EVAP CORE TEMP SENSOR SIG GRN WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT W/ ENGINE CONTROLS IGNITION RELAY ENERGIZED HVAC CONTROL MODULE (BEHIND UPPER LEFT SIDE OF DASH) HVAC CONTROLS HVAC MOTOR CONTROL LEFT AIR TEMPERATURE DOOR ACTUATOR LOGIC LOWER AIR LOWER AIR OUTLET SWITCH MAX WINDSHIELD DEFROST IND MAX WINDSHIELD DEFROST SWITCH MODE DOOR ACTUATOR MODE DOOR STEPPER MOTOR CONTROL (2) MODE DOOR STEPPER MOTOR CONTROL (4) MODE DOOR STEPPER MOTOR CONTROL 1 MODE DOOR STEPPER MOTOR CONTROL 3 OUTLET IND RED/GRY WIRE RED/WHT WIRE START/ STOP SWITCH TEMP DOOR STEPPER MOTOR CONTROL 1 TEMP DOOR STEPPER MOTOR CONTROL 2 TEMP DOOR STEPPER MOTOR CONTROL 3 TEMP DOOR STEPPER MOTOR CONTROL 4 UNDERHOOD AUXILIARY FUSE BLOCK UNDERHOOD FUSE BLOCK UPPER AIR OUTLET IND UPPER AIR OUTLET SWITCH VIO/BLU WIRE VIO/GRN WIRE WHT WIRE WHT/BLK WIRE WHT/GRY WIRE WINDSHIELD DEFROST IND WINDSHIELD DEFROST SWITCH YEL WIRE YEL/GRN WIRE

AUDIO LOW REF AUDIO SIG + AUXILIARY AUDIO INPUT BATT POSITIVE VOLT BLK WIRE BLK/BRN WIRE BLK/GRY WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE CELL VT COAX CELL/GPS BN COAX COAX COMPUTER DATA LINES SYSTEM GND SIG GRY/GRN WIRE GRY/YEL WIRE HOT AT ALL TIMES LEFT FRONT MOBILE TELEPHONE MICROPHONE LOGIC LOW REF LVDS MICROPHONE SIG NCA WIRE POWER DISTRIBUTION SYSTEM RED/BLU WIRE RED/WHT WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK SERIAL DATA (+)9 SERIAL DATA COMMUNICATION ENABLE SERIAL DATA (-) 9 SERIAL DATA 2 TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE USB USB RECEPTACLE VIO/YEL WIRE W/ DIGITAL AUDIO SYSTEM W/ ONSTAR WHT/BLU WIRE WHT/GRN WIRE YEL WIRE

AUDIO AMPLIFIER (ON REAR WALL OF PASSENGER COMPT) BATT POS VOLT BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/VIO WIRE BRN/BLK WIRE BRN/BLU WIRE COAX COMPUTER DATA LINES SYSTEM ETHERNET BUS 6 (-) GND 27 GRN WIRE GRN/BLK WIRE GRY/BLK WIRE GRY/GRN WIRE HOT AT ALL TIMES LEFT FRONT DOOR SPEAKER LEFT INSTRUMENT PANEL FUSE BLOCK LEFT INSTRUMENT PANEL SPEAKER LEFT REAR DOOR SPEAKER LEFT/REAR SUBWOOFER SPKR (-) LOW REF LEFT/REAR SUBWOOFER SPKR CTRL (+) LF SPKR LF SPKR 1 (-) LR SPKR NCA WIRE RED/YEL WIRE RF SPKR RF SPKR 1 (-) RIGHT FRONT DOOR SPEAKER RIGHT INSTRUMENT PANEL SPEAKER RIGHT REAR DOOR SPEAKER RR SPKR SERIAL DATA 2 SUBWOOFER SPEAKER WHT WIRE WHT/YEL WIRE WLAN WIRELESS COMMUNICATION ANTENNA YEL WIRE YEL/BLK WIRE

AUDIO SIG (-) CTRL BACKUP LAMP CTRL BATT POSITIVE VOLT BK USB AM/FM ANT SIG BLK/GRY WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BRN/BLK WIRE BRN/BLU WIRE COAX COMPUTER DATA LINES SYSTEM CU COAX XM ETHERNET BUS 4 (-) ETHERNET BUS 6 (-) ETHERNET BUS 7 (-) GRN WIRE GRN/BLK WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/WHT WIRE GRY/YEL WIRE GY LVDS DISPLAY SIG HOT AT ALL TIMES LEFT FRONT DOOR SPEAKER LEFT INSTRUMENT PANEL SPEAKER LEFT REAR DOOR SPEAKER LF SPEAKER (-) CTRL 1 LF SPEAKER 1 (+) CTRL LOW SPEED GMLAN SERIAL DATA 2 LR (-) CTRL AUDIO SIG LR SPEAKER (+) CTRL LVDS MICROPHONE MICROPHONE SIG RADIO RED/BLU WIRE RED/YEL WIRE RF SPEAKER (-) CTRL 1 RF SPEAKER 1 (+) CTRL RF SPEAKER CTRL (+) RIGHT FRONT DOOR SPEAKER RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT INSTRUMENT PANEL SPEAKER RIGHT REAR DOOR SPEAKER RR SPEAKER (+) CTRL SERIAL DATA (-) 9 SERIAL DATA COMMUNICATION ENABLE USB VIO/YEL WIRE W/ DIGITAL AUDIO SYSTEM WHT WIRE WHT/BLU WIRE WHT/GRN WIRE YEL WIRE YEL/BLK WIRE

1-RD 2-RD AUDIO LOW REF AUDIO SIG + AUXILIARY AUDIO INPUT BATT POSITIVE VOLT BLK WIRE BLK/BRN WIRE BLK/GRY WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE CELL VT COAX CELL/GPS BN COAX CELLULAR PHONE NAVIGATION, DIGITAL RADIO ANTENNA COAX COMPUTER DATA LINES SYSTEM GND SIG GRY/GRN WIRE GRY/YEL WIRE HOT AT ALL TIMES LEFT FRONT MOBILE TELEPHONE MICROPHONE LOGIC LOW REF LVDS MICROPHONE SIG NCA WIRE POWER DISTRIBUTION SYSTEM RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK SERIAL DATA (+)9 SERIAL DATA COMMUNICATION SERIAL DATA (-) 9 SERIAL DATA 2 TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE USB USB RECEPTACLE VIO/YEL WIRE W/ DIGITAL AUDIO SYSTEM W/ ONSTAR WHT/BLU WIRE WHT/GRN WIRE YEL WIRE

6.6L DIESEL AUTOMATIC TRANSMISSION ASSEMBLY BATTERY BATTERY FUSE BLOCK BLK WIRE BLK/GRY WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BLU/GRN WIRE BODY CONTROL MODULE (UNDER LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY ENGINE CONTROL MODULE GMLAN SERIAL DATA - 1 GRN WIRE GRN/BLK WIRE GRY WIRE HIGH SPEED GMLAN SERIAL DATA (+) 7 HOT W/ IGNITION MAIN RELAY ENERGIZED IGN KEY SIG IGN MODE SW SIG 2 IGNITION MODE SW MODE VOLT IGNITION MODE SWITCH IGNITION SWITCH KEYLESS ENTRY CONTROL MODULE (BEHIND LEFT SIDE OF DASH) LOW SPD GMLAN SERIAL DATA OFF OFF/RUN/CRANK VOLT PASSIVE START SW 2 LOW REF POWER DISTRIBUTION SYSTEM RED/GRN WIRE RED/YEL WIRE RUN WIRE RUN/CRANK IGN 1 VOLT STARTER ENABLE RELAY CTRL STARTER MOTOR STARTER RELAY TRANSMISSION CONTROL MODULE TRANSMISSION INTERNAL MODE SWITCH TRANSMISSION PARK/ NEUTRAL SIGNAL 1 UNDERHOOD FUSE BLOCK VIO/GRN WIRE WHT WIRE WHT/BLK WIRE WHT/GRY WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE

A/C COMPRESSOR CLUTCH RELAY CONTROL A/C REFRIGERANT PRESSURE SENS SIG ACCELERATOR PEDAL POSITION LOW REF 1 ACCELERATOR PEDAL POSITION LOW REF 2 ACCELERATOR PEDAL POSITION SENSOR ACCELERATOR PEDAL POSITION SIG 1 ACCELERATOR PEDAL POSITION SIG 2 ACCESSORY WAKEUP SERIAL DATA AIR CONDITIONING SYSTEM AMBIENT AIR TEMP SENS SIG ANTI-THEFT SYSTEM BATTERY POSITIVE VOLT 4 BLK/BLU WIRE BLK/GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BLU/GRY WIRE BRAKE POSITION SENS SIG BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE CHECK ENGINE INDICATOR CONTROL COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM CRUISE/ETC/TCC BRAKE SIG DISABLE SIG ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) ENGINE CONTROL SENS LOW REFERENCE 2 ENGINE OIL LEVEL SWITCH EVAP PURGE SOLENOID VALVE CONTROL FUEL PUMP PRIMARY RELAY CONTROL GRN WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/WHT WIRE HIGH SPEED GMLAN SERIAL DATA (+) 7 HIGH SPEED GMLAN SERIAL DATA (-) (1) HOOD STATUS A SIG MASS AIR FLOW SENS SIG MIRROR AMBIENT AIR TEMPERATURE SENSOR MULTI-FUNCTION INTAKE AIR SENSOR OIL LEVEL SWITCH SIG OIL PRESSURE SENS SIG POWERTRAIN MAIN RELAY FUSED SPLY 1 POWERTRAIN MAIN RELAY FUSED SPLY 2 POWERTRAIN RELAY COIL CONTROL RED/BRN WIRE RUN/CRANK IGNITION 1 VOLT 4 STARTER ENABLE RELAY CONTROL STARTING/CHARGING SYSTEM TRANSMISSION PARK/NEUTRAL SIG 1 TRANSMISSIONS SYSTEM VIO/BLU WIRE VIO/GRN WIRE VIO/YEL WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE YEL/WHT WIRE

BATT POS BATTERY POSITIVE VOLT BLK WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BRN WIRE BLU/VIO WIRE BLU/WHT WIRE BLU/YEL WIRE BRAKE PEDAL POSITION SENSOR BRN WIRE BRN/RED WIRE BRN/WHT WIRE CHECK ENG CLUSTER SYSTEM COMPUTER DATA COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY ENGINE OIL IND ENGINE OIL PRESSURE SENSOR EVAP VENT SOL VALVE CTRL EVAPORATIVE EMISSION PURGE SOLENOID VALVE FUEL GAUGE IND FUEL LEVEL SENS LO REF FUEL PRESS SENS LO REF FUEL PRESS SENS SIG FUEL PRESSURE SENSOR FUEL PUMP FUEL PUMP CTRL FUEL PUMP PRIMARY RLY CTRL FUEL TANK PRESS SENS SIG FUEL TANK PRESSURE SENSOR GMLAN GMLAN SER DATA (-) 7 GND 18 GRN WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/WHT WIRE GROUND GRY WIRE GRY/GRN WIRE IND CNTRL INSTRUMENT INSTRUMENT CLUSTER LINES SYSTEM LO SPD LOGIC MALFUNCTION IND LIGHT POWER DISTRIBUTION SYSTEM PRESS SENS LO REF PRIMARY FUEL LVL SENS SIG PRIMARY FUEL PUMP, LEVEL SENSOR ASSEMBLY RED/BRN WIRE RED/GRY WIRE RED/VIO WIRE RELAY CTRL RUN/CRANK IGNITION 1 VOLT SHIELD GND SPLY VOLT PHASE 2 SPLY VOLT PHASE 3 TRANSMISSIONS SYSTEM VIO WIRE VIO/BLU WIRE VIO/GRN WIRE VOLT 28 W/ DUAL TANK W/O DUAL TANK WHT WIRE WHT/BRN WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/BRN WIRE YEL/GRY WIRE YEL/RED WIRE

BLK WIRE BLK/GRY WIRE BLK/YEL WIRE BLU WIRE BLU/GRY WIRE BRN/BLU WIRE BRN/WHT WIRE COMPUTER DATA ENGINE CONTROL MODULE ENGINE CTRL ENGINE CTRL MOD LIN BUS 1 ENGINE CTRL MOD LIN BUS 2 ENGINE CTRL SENS LO REF 1 ENGINE OIL PUMP CONTROL ENHANCED DRV MODE 2 SW SIG GRN/BLU WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/WHT WIRE HEATED OXYGEN HEATED OXYGEN SENS HEATED OXYGEN SENS HEATER HEATED OXYGEN SENSOR BANK 1 SENSOR 1 HEATED OXYGEN SENSOR BANK 1 SENSOR 2 HEATED OXYGEN SENSOR BANK 2 SENSOR 1 HEATED OXYGEN SENSOR BANK 2 SENSOR 2 HI SIG BANK 1 SENS (1) HI SIG BANK 2 SENS 2 HOT AT ALL TIMES IGNITION CTRL (5) IGNITION CTRL 3 IGNITION CTRL 4 IGNITION CTRL 6 IGNITION CTRL LO REF BANK 2 KNOCK SENS LO REF KNOCK SENS LO REF 1 LINES SYSTEM LO CTRL BANK 1 SENS (2) LO CTRL BANK 1 SENS 1 (3) LO CTRL BANK 2 SENS 1 LO CTRL BANK 2 SENS 2 LO SIG BANK 1 SENS 1 LO SIG BANK 2 SENS 1 LO SIG BANK 2 SENS 2 MAIN RELAY FUSED SPLY 5 NCA WIRE POWERTRAIN POWERTRAIN MAIN RED/BRN WIRE RED/GRY WIRE RED/VIO WIRE RELAY FUSED SPLY 1 RIGHT INSTRUMENT PANEL FUSE BLOCK SENS 5 VOLT REF 1 SENS HI SIG BANK 2 SENS 1 SPARK PLUG SYSTEM THROTTLE ACTR CTRL CLOSE TRANSMISSIONS VIO/BLU WIRE VIO/GRN WIRE VIO/GRY WIRE VIO/WHT WIRE W/ DUAL TANK W/O DUAL TANK WHT WIRE WHT/BLK WIRE WHT/BRN WIRE WHT/RED WIRE WHT/YEL WIRE YEL WIRE YEL/BLU WIRE YEL/WHT WIRE