GMC Sierra IV (2018-2022) low ref Wiring diagrams

3.0L TURBO DIESEL 5.3L, 6.2L AUXILIARY UNDERHOOD FUSE BLOCK BATTERY FUSE BLOCK BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BRN WIRE BRN/YEL WIRE CHARGE AIR COOLER COOLANT PUMP CHARGE AIR COOLER COOLANT PUMP RELAY CHARGE AIR COOLER INLET TEMPERATURE SENSOR CHARGE AIR COOLER OUTLET TEMPERATURE SENSOR CLOSE CTRL COMPUTER DATA LINES SYSTEM ENGINE CONTROL MODULE (3.0L TURBO DIESEL) ENGINE COOLANT TEMPERATURE SENSOR ENGINE COOLANT TEMPERATURE SENSOR 7 GRN WIRE GRN/VIO WIRE GRY WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/VIO WIRE HOT AT ALL TIMES HOT W/ ENGINE CONTROLS IGNITION RELAY ENERGIZED LOW REF OPEN CTRL POS SIG RED WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE SENS LOW REF SENS SIG TEMP SIG UNDERHOOD FUSE BLOCK VIO/BLU WIRE WHT/RED WIRE YEL/BLK WIRE YEL/BLU WIRE

B+ VOLT BLK WIRE BLK/WHT WIRE BLU WIRE BLU/YEL WIRE COMBINED VEHICLE INERTIAL SENSOR SUPPLY VOLT COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY ELECTRONIC BRAKE CONTROL MODULE GRN WIRE GRN/BRN WIRE GROUND GRY/GRN WIRE HI SPD GMLAN SERIAL DATA (-) (1) HI SPD GMLAN SERIAL DATA (-) (2) HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT PRESSURE SENSOR LOGIC LOW REF LOW SPD GMLAN SERIAL DATA 2 POWER STEERING CONTROL MODULE (ON POWER STEERING RACK ASSEMBLY) POWER STEERING PRESSURE SENSOR RED WIRE RED/WHT WIRE RIGHT PRESSURE SENSOR SERIAL DATA COMMUNICATION ENABLE SIGNAL GROUND STEERING SOL CONTROL STEERING SOL LOW REF STEERING WHEEL ANGLE SENSOR UNDERHOOD FUSE BLOCK VARIABLE POWER STEERING SOLENOID VALVE WHT WIRE WHT/BLU WIRE

AJAR SW SIG BATT POS VOLT 4 BLK WIRE BLK/GRN WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/VIO WIRE BLU/WHT WIRE BRAKE FLUID LEVEL SWITCH BRK FLUID LVL SENS SIG BRN WIRE COMPUTER DATA LINES SYSTEM ELECTRONIC BRAKE CONTROL MODULE (BEHIND UNDERHOOD FUSE BLOCK) FUEL PUMP DRIVER CONTROL MODULE GRN/GRY WIRE GRN/YEL WIRE GRY WIRE GRY/RED WIRE HI SPD GMLAN SER DATA (+) 1 HOT AT ALL TIMES HOT W/ IGNITION RELAY ENERGIZED LEVEL SENS SIG LIN BUS 3 LOGIC LOW REF PARK BRAKE CONTROL SWITCH (ON PARK BRAKE PEDAL ASSEMBLY) PARK BRK APPLY SW VOLT REF 1 PARK BRK APPLY SW VOLT REF 2 PARK BRK SW MONITOR SIG 1 PARK BRK SW MONITOR SIG 2 PARK BRK SW SIG PARK BRK SW TEST SIG PASSENGER WINDOW MOTOR PRIMARY FUEL LEVEL SENSOR PRIMARY FUEL PUMP, LEVEL SENSOR ASSEMBLY RED/YEL WIRE RF DR SECONDARY FUEL LEVEL SENSOR SECONDARY FUEL PUMP, LEVEL SENSOR ASSEMBLY SERIAL DATA (-) 7 UNDERHOOD FUSE BLOCK VIO/BLU WIRE W/ DUAL TANK W/O DUAL TANK WHT WIRE YEL WIRE YEL/RED WIRE

AUDIO SIG + BATT POSITIVE VOLT BK COAX AM/FM ANT SIG BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/GRY WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/RED WIRE BU COAX GPS BU USB AM/FM ANT SIG CELLULAR TELEPHONE MICROPHONE SIG COAX COMPUTER DATA LINES SYSTEM CU COAX XM DOWN ETHERNET BUS 4 (-) ETHERNET BUS 6 (-) ETHERNET BUS 7 (-) GRN WIRE GRN/RED WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/WHT WIRE GRY/YEL WIRE GY LVDS DISPLAY SIG HOT AT ALL TIMES LOGIC LOW REF LVDS MICROPHONE MICROPHONE SIG MUTE NAVIGATION ANTENNA NAVIGATION SYSTEM NCA WIRE OG COAX COAX CAM SIG ORG/RED WIRE PNK WIRE RADIO RADIO ANTENNA RADIO PRESETS STEERING WHEEL CONTROLS SWITCH RADIO VOLUME STEERING WHEEL CONTROLS SWITCH RED/BLU WIRE RED/YEL WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT STEERING WHEEL CONTROLS SWITCH SEEK LEFT/ SEEK RIGHT/ SELECT STEERING WHEEL AIR BAG COIL USB VIO/YEL WIRE VOICE W/ ONSTAR W/O ONSTAR

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 BN COAX CELL CELL/GPS 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 SER DATA COMM ENABLE SERIAL DATA (-) 9 SERIAL DATA 2 TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE USB USB RECEPTACLE VIO/YEL WIRE VT COAX W/ ONSTAR W/O ONSTAR WHT/BLU WIRE WHT/GRN WIRE YEL WIRE

AC POWER OUTLET ENABLE ACCESSORY DC/AC POWER INVERTER MODULE BLK WIRE BLK/WHT WIRE BLU/BRN WIRE BODY CONTROL MODULE BRN WIRE BRN/BLK WIRE CARGO ACCESSORY POWER RECEPTACLE COMPUTER DATA LINES SYSTEM DC/AC INVERTER CTRL DC/AC INVERTER CTRL 2 FROM UNDERHOOD FUSE BLOCK (DIAGRAM 7 OF 10) GRN WIRE GRN/BRN WIRE GROUND LOGIC LOW REF LOW REF (8) NCA WIRE RED WIRE RED/WHT WIRE SERIAL DATA VIO/YEL WIRE WAKEUP SERIAL DATA DC/AC INVERTER RLY CTRL WHT/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 BN CELL/GPS 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 VT CELL COAX W/ DIGITAL AUDIO SYSTEM W/ ONSTAR WHT/BLU WIRE WHT/GRN WIRE YEL 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 BN CELL/GPS 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 VT CELL COAX W/ DIGITAL AUDIO SYSTEM W/ ONSTAR WHT/BLU WIRE WHT/GRN WIRE YEL WIRE

4108 (OR 2203) 5 VOLT REF 6.6L TURBO DIESEL AIR CONDITIONING SYSTEM AUTO SWITCH BLK WIRE BLK/GRY WIRE BLU WIRE BLU/GRY WIRE BLU/RED WIRE BODY CONTROL MODULE BRN WIRE COMPUTER DATA LINES SYSTEM DRIVE MODE SELECT SWITCH ENGINE CONTROL MODULE GRN WIRE GRY WIRE HI SPD GMLAN SER DATA (+) 1 J107 (6.6L) J110 (6.6L) LEFT SWITCH LOW REF NCA WIRE RIGHT SWITCH RUN IGNITION 3 VOLTAGE SNOW SWITCH SPORT SWITCH SW SIG TRANSFER CASE MOTOR VIO WIRE VIO/BRN WIRE WHT WIRE WHT/BRN WIRE WHT/GRN WIRE YEL WIRE YEL/BRN WIRE YEL/GRY WIRE YEL/VIO WIRE

BATT POS VOLT BLK WIRE BLK/GRY WIRE BLU WIRE BODY CONTROL MODULE (UNDER LEFT SIDE OF DASH) BRN/GRN WIRE BRN/GRY WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY GRY WIRE GRY/GRN WIRE GRY/VIO WIRE HI LO HOT AT ALL TIMES INSTRUMENT CLUSTER LO WASHER FLUID IND CTRL LOGIC LOW REF MIST MIST HI OFF LO INT INT MTR PARK SW SIG OFF RED WIRE RED/BRN WIRE RED/WHT WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK SERIAL DATA (-) (1) SERIAL DATA 2 TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK VIO WIRE WASHER RLY CTRL WASHER SW SIG WASHER SWITCH WHT WIRE WHT/BLK WIRE WHT/VIO WIRE WINDSHIELD WASHER FLUID LEVEL SWITCH WINDSHIELD WASHER PUMP WINDSHIELD WASHER PUMP RELAY WINDSHIELD WIPER MOTOR WINDSHIELD WIPER MTR RLY COIL SUPPLY VOLT WINDSHIELD WIPER RELAY WINDSHIELD WIPER SPEED CONTROL RELAY WINDSHIELD WIPER SW HI SIG WIPER SW HI SIG WIPER SW LOW SIG WIPER SWITCH YEL/BLU WIRE YEL/BRN WIRE