GMC Sierra IV (2018-2022) computer data lines system Wiring diagrams

1-BG FRONT VIEW CAMERA COAXIAL VIDEO SIG 1-BG LEFT SIDE VIEW CAMERA COAXIAL VIDEO SIG 1-BN FRONT VIEW CAMERA COAXIAL VIDEO SIG 1-BN REAR VIEW CAMERA COAXIAL VIDEO SIG 1-RD COAXIAL VIDEO SIG 2-BG 2-BN LEFT SIDE VIEW CAMERA COAXIAL VIDEO SIG 2-BN RIGHT SIDE VIEW CAMERA COAXIAL VIDEO SIG 2-GN REAR VIEW CAMERA COAXIAL VIDEO SIG 2-RD BATT POS VOLT BLK/WHT WIRE CAMPER TRAILER CONNECTOR CARGO AREA REAR VIEW DRIVER INFORMATION CAMERA COAX COMPUTER DATA LINES SYSTEM DRIVER OUTSIDE REAR- VIEW MIRROR GRILLE FRONT VIEW CAMERA GRY/GRN WIRE HOT AT ALL TIMES LEFT SIDEVIEW CAMERA NCA WIRE PASSENGER OUTSIDE REAR VIEW MIRROR RADIO REAR VIEW CAMERA RED/GRY WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT SIDEVIEW CAMERA SERIAL DATA VIDEO PROCESSING CONTROL MODULE

A/C COMPRESSOR A/C COMPRESSOR CLUTCH A/C COMPRESSOR SOLENOID VALVE AMBIENT LIGHT/ SUNLOAD SENSOR AUXILIARY HEATER CTRL BATT POSITIVE VOLT BLK WIRE BLK/GRN WIRE BLOWER MOTOR (RIGHT SIDE OF DASH) BLOWER MTR SPD CTRL BLOWER SPEED FEEDBACK SIGNAL BLU WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/WHT WIRE BLU/YEL WIRE BODY CONTROL MODULE BRN/GRN WIRE COMPUTER DATA LINES SYSTEM DRIVER SOLAR SENSOR SIGNAL ELECTRIC VARIABLE DISPLACEMENT CTRL ELECTRIC VARIABLE DISPLACEMENT SPLY ELECTRICAL AUXILIARY HEATER GRN WIRE GRN/BLU WIRE GRN/YEL WIRE GROUND GRY WIRE HEADLIGHTS SYSTEM HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED HVAC CONTROL MODULE (BEHIND UPPER LEFT SIDE OF DASH) INSIDE AIR TEMPERATURE SENSOR SIG LIN SERIAL DATA BUS 19 LINEAR INTERCONNECT NETWORK SERIAL DATA BUS 9 LOGIC LOW SPD GMLAN SERIAL DATA NCA WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK RUN IGNITION 3 VOLTAGE SERIAL DATA (-) (1) SOLAR SENSOR LOW REFERENCE VIO WIRE VIO/BRN WIRE VIO/GRY WIRE WHT WIRE WHT/BLU WIRE

A/C COMPRESSOR A/C COMPRESSOR CLUTCH A/C COMPRESSOR SOLENOID VALVE A/C COMPRESSOR SOLENOID VALVE CTRL AUXILIARY HEATER CTRL BATT POSITIVE VOLT BLK WIRE BLOWER MOTOR (RIGHT SIDE OF DASH) BLOWER MTR SPD CTRL BLOWER SPEED FEEDBACK SIGNAL BLU WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/YEL WIRE BODY CONTROL MODULE BRN/GRN WIRE COMPUTER DATA LINES SYSTEM ELECTRICAL AUXILIARY HEATER GRN WIRE GRN/BLU WIRE GRN/YEL WIRE GROUND HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED HVAC CONTROL MODULE (BEHIND UPPER LEFT SIDE OF DASH) HVAC CONTROL MODULE LIN BUS 1 HVAC CONTROL MODULE LIN BUS 2 LOGIC LOW SPD GMLAN SERIAL DATA NCA WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK RUN IGNITION 3 VOLTAGE SERIAL DATA (-) (1) VIO WIRE VIO/BRN WIRE VIO/GRY WIRE WHT 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 SIG (-) CTRL AUDIO SIG + BATT POSITIVE VOLT BK COAX AM/FM ANT SIG BK USB AM/FM ANT SIG BLK/BLU WIRE BLK/GRY WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BRN/BLK WIRE BRN/BLU WIRE BU COAX GPS COAX COMPUTER DATA LINES SYSTEM CU COAX XM DOWN ETHERNET BUS 4 (-) ETHERNET BUS 6 (-) ETHERNET BUS 7 (-) GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/BRN 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 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 USB VIO/YEL WIRE VOICE W/ DIGITAL AUDIO SYSTEM W/O ONSTAR WHT/YEL WIRE YEL/BLU 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

AM/FM ANT SIG COAX BK BACK BACK- WARD BLK/BLU WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE COAX COAX BU GPS COAX OG COAX CAM SIG COMPUTER DATA LINES SYSTEM DOWN FORWARD/ GRY/BRN WIRE HOME INFO DISPLAY MODULE LOGIC LVDS MUTE NAVIGATION ANTENNA NAVIGATION SYSTEM NCA WIRE PNK WIRE RADIO RADIO ANTENNA RADIO PRESETS STEERING WHEEL CONTROLS SWITCH RADIO VOLUME STEERING WHEEL CONTROLS SWITCH RED/WHT WIRE RED/YEL WIRE RIGHT FRONT MOBILE TELEPHONE MICROPHONE RIGHT STEERING WHEEL CONTROLS SWITCH SEEK LEFT UP SEEK RIGHT SELECT VIO/YEL WIRE VOICE W/O ONSTAR WHT/YEL WIRE WIR BG WLAN WIRELESS COMMUNICATION ANTENNA YEL/BLU WIRE