GMC Hummer EV I (2021-2024) computer data lines system Wiring diagrams

A/C EVAPORATOR TEMP SENS SIG AC PWR OUTLET STATUS IND CTRL AIR CONDITIONING SYSTEM ALL WINDOWS OPEN SW SIG AMBIENT LT SENS SIG ANTI-LOCK BRAKES SYSTEM ANTI-THEFT SYSTEM AUTO HI BEAM ASSIST SW SIG AUTOSAR CAN BUS (-) 9 SERIAL DATA AUTOSAR CAN BUS (-) 9 SERIAL DATA IND DIMMING CTRL BATTERY POS VOLT BATT POS VOLT BATTERY POS VOLT BLK WIRE BLK/GRY WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/VIO WIRE BLU/WHT WIRE BLU/YEL WIRE BLWR MTR SPD CTRL BLWR SPD FEEDBACK SIG BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) BODY CTRL MOD LIN BUS 5 BODY CTRL MOD LIN BUS 6 BODY CTRL MOD LIN BUS 7 BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/VIO WIRE BRN/YEL WIRE CARGO LP IND TRL CARGO LP SW SIG COMPUTER DATA LINES SYSTEM COURTESY LP SW SIG CRUISE CONTROL SYSTEM CRUISE CONTROL, NAVIGATION SYSTEMS CRUISE CONTROL, TRANSMISSIONS SYSTEMS CRUISE CTRL SET/COAST/RES/ACC SW SIG DISTANCE SENSING CRUISE CTRL GAP UP/DN SW SIG DOME/READING LP ENABLE SIG DOOR LOCKS, ANTI-THEFT SYSTEMS DRV SOLAR SENS SIG ENGINE CONTROLS SYSTEM ENHANCED DRV MODE 2 SW SIG FRT CLOSURE REL INTR SW SIG FRT CLOSURE REL INTR SW WAKE UP SIG FRT COMPT ENTRAPMENT REL SW SIG FRT FOOTWELL ACCENT LIGHTING CTRL GRN/BLU WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE GROUND GRY WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/ORG WIRE GRY/RED WIRE GRY/VIO WIRE HAZ WARN SW SIG HDLP SW FLASH SIG HDLP SW OFF SIG HDLP SW ON SIG HDLP SW PRK LP SIG HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM AIR CONDITIONING SYSTEM HEADLIGHTS, AIR CONDITIONING, ANTI-THEFT SYSTEMS HI BEAM SEL SW HI BEAM SIG HORN SW SIG HORNS SYSTEM HOT AT ALL TIMES HVAC REM ENABLE SIG HVAC SYS ENABLE SIG IGN MODE SW ACC LED SIG IGN MODE SW MODE VOLT IGN MODE SW ST LED SIG IMMO ANT LO SIG IMMO ANT SIG [+] INSIDE AIR TEMP SENS SIG INSTRUMENT PANEL LP DIMMER SW LO REF INSTRUMENT PANEL LP DIMMER SW SIG INTR DR HNDL ACCENT LIGHTING CTRL INTR LP CTRL INTR LP DEFEAT SW SIG LANE DEP WARN DISABLE SW SIG LED BACKLIGHT DIMMING CTRL 1 LEFT INSTRUMENT PANEL WIRING HARNESS JUNCTION BLOCK LH CONDENSING HTR AIR TEMP SENS SIG LH TURN SIG SW SIG MAJOR ENDGATE HI RLY CTRL MAJOR ENDGATE LO RLY CTRL MAJOR ENDGATE REL SW SIG INTR MINOR ENDGATE HIGH RLY CTRL NAVIGATION SYSTEM OVERHEAD ACCENT LIGHTING CTRL PARKING ASSIST PARALLEL PARKING DISABLE SW SIG PASSIVE ENTRY CLOSURE 2 ANT SIG HI PASSIVE ENTRY CLOSURE 2 ANT SIG LO POWER DISTRIBUTION SYSTEM POWER DISTRIBUTION, INTERIOR LIGHTS SYSTEMS POWER WINDOWS SYSTEM RED/BLU WIRE RED/GRY WIRE RED/WHT WIRE REGEN ON DEMAND SW SIG RETAINED ACC PWR RLY 2 COIL CTRL RH CONDENSING HTR AIR TEMP SENS SIG RH TURN SIG SW SIG RIGHT INSTRUMENT PANEL WIRING HARNESS JUNCTION BLOCK RR PARKING ASSIST DISABLE LED SIG RR PARKING ASSIST DISABLE SIG RUN/CRNK RLY COIL CTRL SECURITY IND CTRL SENS LO REF SIG GROUND STRG WHEEL RESISTOR LADDER LO REF TRANSMISSIONS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM VIO/BLU WIRE VIO/GRN WIRE VIO/YEL WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/VIO WIRE WHT/YEL WIRE WINDSHIELD WASH SW SIG WINDSHIELD WIP SW LO REF WINDSHIELD WIP SW LO SIG WIPER/WASHER SYSTEM YEL WIRE YEL/BRN WIRE YEL/GRY WIRE YEL/VIO WIRE

BLK WIRE BLK/GRY WIRE BLU/BRN WIRE BLU/GRN WIRE BODY CONTROL MODULE (UNDER LEFT SIDE OF DASH) BRN/GRN WIRE BRN/GRY WIRE COMPUTER DATA LINES SYSTEM DELAY SWITCH ENGINE WIRING HARNESS JUNCTION BLOCK GRN/GRY WIRE GRY WIRE GRY/VIO WIRE HI LO HI SPD GMLAN SER DATA (+) 1 HI SPD GMLAN SER DATA (+) 1 SIG GND HOT AT ALL TIMES MIST OFF INT RED/GRY WIRE UNDERBODY CAMERAS CAMERA WASHER FLUID PUMP RELAY WASHER SWITCH WHT WIRE WHT/BLK WIRE WHT/GRN WIRE WHT/VIO WIRE WINDSHIELD WASHER PUMP WINDSHIELD WASHER PUMP RELAY WINDSHIELD WASHER SW SIG WINDSHIELD WIPER MOTOR WINDSHIELD WIPER MOTOR RELAY WINDSHIELD WIPER MOTOR SPEED CONTROL RELAY WINDSHIELD WIPER SW LOW REF WINDSHIELD WIPER SW LOW SIG WINDSHIELD WIPER SWITCH WINDSHIELD WIPER, WINDSHIELD WASHER SWITCH YEL/BRN WIRE

AUTOSAR CAN BUS (+) 5 SERIAL DATA BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/YEL WIRE BRN/GRN WIRE BRN/GRY WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY GRN/BRN WIRE GRY WIRE HOT AT ALL TIMES INSTRUMENT PANEL CLUSTER CONTROL MODULE LEFT HEADLAMP HIGH BEAM CONTROL LIGHTING CONTROL MODULE (RIGHT END OF DASH) LOGIC LOW WASHER FLUID INDICATOR CONTROL RED/GRY WIRE RED/VIO WIRE RED/YEL WIRE RIGHT INSTRUMENT PANEL WIRING HARNESS JUNCTION BLOCK VIO WIRE WHT/VIO WIRE WINDSHIELD OUTSIDE MOISTURE/ AMBIENT LIGHT, HUMIDITY SENSOR WINDSHIELD WASHER RELAY WINDSHIELD WASHER SOLVENT CONTAINER LEVEL SENSOR WINDSHIELD WIPER MOTOR PARK SWITCH SIGNAL WINDSHIELD WIPER MOTOR RELAY COIL CONTROL WINDSHIELD WIPER SWITCH HIGH SIGNAL

AUTOSAR CAN BUS (+) 2 SERIAL DATA AUTOSAR CAN BUS (-) 9 SERIAL DATA BATTERY ENERGY CONTROL MODULE 2 (FRONT OF RIGHT REAR WHEELWELL) BATTERY POSITIVE VOLTAGE BLK WIRE BLU/GRN WIRE BLU/YEL WIRE COMPUTER DATA LINES SYSTEM GND (PINS: 46 TO 60 NOT USED) 61 GRN/BLU WIRE GRN/WHT WIRE HIGH VOLTAGE BATT SERIES (-) RLY CTRL HOT AT ALL TIMES LEFT INSTRUMENT PANEL WIRING HARNESS JUNCTION BLOCK RED/BRN WIRE RED/VIO WIRE RUN/CRANK IGNITION 1 VOLTAGE (PINS: 64 TO 80 NOT USED) VIO/GRN WIRE WHT WIRE WHT/GRN WIRE

ACC PWR MOD SUPPLY VOLT 1 ACC PWR MOD SUPPLY VOLT 2 AUTOSAR CAN BUS (+) 2 SERIAL DATA AUTOSAR CAN BUS (+) 9 AUTOSAR CAN BUS (-) 2 AUTOSAR CAN BUS (-) 9 SERIAL DATA BATT POS VOL BLK WIRE BLK/BRN WIRE BLK/GRY WIRE BLU WIRE BLU/GRN WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/YEL WIRE CAN BUS (-) SERIAL DATA COMPUTER DATA LINES SYSTEM DRIVE MOTOR 1 POSITION SENSOR DRIVE MOTOR 1 STATOR DRIVE MOTOR CONTROL MODULE 1 DRIVE UNIT SUMP OIL TEMP SENS LOW REF DRIVE UNIT SUMP OIL TEMP SENS SIG DRV MTR 1 POS SENS 1 SIG DRV MTR 1 POS SENS 2 SIG DRV MTR 1 POS SENS 3 SIG DRV MTR 1 POS SENS EXCITATION SIG (+) DRV MTR 1 POS SENS EXCITATION SIG (-) DRV MTR 1 POS SENS 4 SIG ELC TRANSMISSION RANGE PARK ENGAGE CTRL ELEC TRANS RANGE PARK POS SENS 1 SIG ELEC TRANS RANGE PARK POS SENS 2 SIG FRONT ELECTRIC DRIVE TRANSMISSION MODULE FRONT ELECTRIC DRIVE TRANSMISSION MODULE (ON FRONT POWERTRAIN CRADLE) GRN/BLU WIRE GRY WIRE HI VOLT BATT TRACTION PWR INVERTER MOD 1 (-) HOT AT ALL TIMES LEFT INSTRUMENT PANEL WIRING HARNESS JUNCTION BLOCK LOW REF ORG/ WIRE ORG/BLK WIRE PARK DISENGAGE CTRL PARK POS SENS 2 5 VOLT REF PARK POS SENS 2 LOW REF RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE RED/WHT WIRE RED/YEL WIRE RUN/CRANK IGNITION 1 VOLT SECONDARY FUSED BATT POS VOL 104 E-STOP 1 SECONDARY FUSED BATT POS VOLT 108 E-STOP 5 TRANSMISSION OIL PUMP CTRL TRANSMISSION OIL PUMP DIAGNOSTIC FEEDBACK SIG TRANSMISSIONS SYSTEM VIO/BLK WIRE VIO/GRN WIRE VIO/RED WIRE WHT WIRE WHT/GRN WIRE WHT/GRY WIRE YEL WIRE YEL/GRY WIRE

BATTERY CHARGER BATTERY DISTRIBUTION ENGINE COMPARTMENT FUSE BLOCK BLK WIRE BLU/YEL WIRE COMPUTER DATA LINES SYSTEM ENGINE WIRING HARNESS JUNCTION BLOCK GRN/VIO WIRE GRN/WHT WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED ORG/ WIRE ORG/BLK WIRE ORG/BLU WIRE ORG/WHT WIRE RED/BLU WIRE RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE RIGHT INSTRUMENT PANEL WIRING HARNESS JUNCTION BLOCK VIO/GRN WIRE YEL/VIO WIRE

ACC PWR MOD SUPPLY VOLT 1 BATT (+) VOLT 105 E-STOP 2 BATT (+) VOLT 109 E-STOP 6 I BLK WIRE BLK/GRY WIRE BLU WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/GRY WIRE BRN/YEL WIRE CAN BUS (-) 2 SERIAL DATA CAN BUS (-) 9 SERIAL DATA CAN BUS (-) SERIAL DATA COMPUTER DATA LINES SYSTEM DRIVE MOTOR 2 POSITION SENSOR DRIVE MOTOR 2 STATOR DRIVE MOTOR CONTROL MODULE 2 DRV MTR 2 POS SENS 1 SIG DRV MTR 2 POS SENS 2 SIG DRV MTR 2 POS SENS 3 SIG DRV MTR 2 POS SENS 4 SIG DRV MTR 2 POS SENS EXCITATION SIG + DRV UNIT SUMP OIL TEM SENS 2 LOW REF DRV UNIT SUMP OIL TEM SENS 2 SIG GRN WIRE GRN/WHT WIRE GRY WIRE GRY/GRN WIRE HI VOLT BATT INVERTER MOD 2 (+) ORG/ WIRE ORG/BLK WIRE PUMP 2 DIAGNOSTIC FEEDBACK SIG REAR ELECTRIC DRIVE TRANSMISSION MODULE (ON REAR POWERTRAIN CRADLE) RED/BLU WIRE RED/BRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE RESOLVER 2 LOW REF RUN/CRANK IGNITION 1 VOLT TRANSMISSION OIL TRANSMISSION OIL PUMP 2 CTRL TRANSMISSIONS SYSTEM VIO/BLK WIRE VIO/GRN WIRE VIO/RED WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/GRY WIRE YEL/VIO WIRE

BATT POS VOLT 110 E-STOP 7 BLK WIRE BLU WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/GRY WIRE BRN/YEL WIRE CAN BUS (-) 2 SERIAL DATA CAN BUS (-) 9 SERIAL DATA CAN BUS (-) SERIAL DATA COMPUTER DATA LINES SYSTEM DRIVE MOTOR 3 POSITION SENSOR DRIVE MOTOR 3 STATOR DRIVE MOTOR CONTROL MODULE 3 ENGINE WIRING HARNESS JUNCTION BLOCK GRN WIRE GRN/WHT WIRE GRY WIRE GRY/GRN WIRE HIGH VOL BATT TRACTION HOT AT ALL TIMES ORG/ WIRE ORG/BLK WIRE PWR INVERTER MOD 3 (+) REAR ELECTRIC DRIVE TRANSMISSION MODULE (ON REAR POWERTRAIN CRADLE) RED/BLU WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE RESOLVER 3 EXCITATION (+) SIG RESOLVER 3 LOW REF RUN/CRANK IGNITION 1 VOLT SECONDARY BATT POS VOLT 106 E-STOP 3 VIO/BLK WIRE VIO/GRN WIRE VIO/RED WIRE VIO/YEL WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/VIO WIRE

A/C REFRIGERANT HIGH SIDE SENS 2 SIG A/C REFRIGERANT HIGH SIDE SENS SIG A/C REFRIGERANT LOW SIDE SENS SIG A/C REFRIGERANT TEMP SENS A SIG A/C REFRIGERANT TEMP SENS B SIG ACCELERATOR PEDAL POS LOW REF 1 ACCELERATOR PEDAL POS LOW REF 2 ACCELERATOR PEDAL POSITION SENSOR ACCESSORY PWR MODULE SUPPLY VOLT 3 AIR CONDITIONING SYSTEM BATT ENERGY CTRL BATT ENERGY CTRL MOD 5 VOLT REFR B BATT ENERGY CTRL MOD LIN BUS 1 BATT ENERGY CTRL MOD LIN BUS 2 BATT ENERGY CTRL MOD LIN BUS 3 BATT POS VOLT BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BLU WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRN/GRY WIRE BRN/RED WIRE BRN/VIO WIRE BRN/YEL WIRE CAN BUS (-) 9 SERIAL DATA CAN BUS (-) SERIAL DATA CHARGE REC TEMP SENS DC+ LOW REF CHARGE RECEPTACLE TEMP SENS L SIG CHARGING LOCK POS LOW REF CHARGING LOCK POS SIG COMPUTER DATA LINES SYSTEM COOLANT ELECTRIC HEATER CTRL GRN WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE GRY/BLU WIRE GRY/GRN WIRE HIGH VOLT BATT 2 (-) RLY CTRL MOD SENS LOW REFR 3 ORG/ WIRE ORG/BLK WIRE POWERTRAIN SENS BUS ENABLE PRECHARGE RLY CTRL 2 RED/BLU WIRE RED/GRY WIRE RED/VIO WIRE RED/YEL WIRE SIG GND VIO/BLK WIRE VIO/BLU WIRE VIO/GRN WIRE VIO/RED WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/VIO WIRE YEL/WHT WIRE

A/C REFRIGERANT TEMP SENS C SIG ACC PWR MOD FIELD DUTY CYCLE SIG ACCELERATOR PEDAL POS SIG 1 ACCELERATOR PEDAL POS SIG 2 ACCESSORY PWR MOD SUPPLY VOLT 4 AIR CONDITIONING SYSTEM AMBIENT AIR TEMP SENS LOW REF AMBIENT AIR TEMP SENS SIG AUTOSAR CAN BUS (+) 2 SERIAL DATA BAT ENERGY CTRL MOD SENS LOW REF 4 BATT ENERGY CTRL MOD 5 VOLT REF C BATT ENERGY CTRL MOD SENS LOW REF 2 BATT ENERGY CTRL MODULE LIN BUS 4 BATT ENERGY CTRL MODULE LIN BUS 5 BATT ENERGY CTRL MODULE LIN BUS 6 BATT RADIO FREQUENCY MOD LOW REF BATT RADIO FREQUENCY MOD SUPPLY VOLT BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/VIO WIRE BLK/YEL WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/RED WIRE BLU/YEL WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/GRY WIRE CHARGE PORT DOOR POS SENS SIG CHARGE REC TEMP SENS DC+ SIG CHARGE REC TEMP SENS L LOW REF COMPUTER DATA LINES SYSTEM FAST CHARGE DC NEGATIVE RLY CTRL FAST CHARGE DC POSITIVE RLY CTRL FAST CHRG OFFBRD CHARGING LK SIG FAST CHRG OFFBRD CHARGING UNLK SIG GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/VIO WIRE HYBRID/EV BATT (-) RLY CTRL HYBRID/EV BATT 1 (+) RLY CTRL HYBRID/EV BATTERY 2 (+) RLY CTRL HYBRID/PROPULSION SYSTEM COOLANT TEMPERATURE SENSOR 1 HYBRID/PROPULSION SYSTEM COOLANT TEMPERATURE SENSOR 2 HYBRID/PROPULSION SYSTEM COOLANT TEMPERATURE SENSOR 3 HYBRID/PROPULSION SYSTEM COOLANT TEMPERATURE SENSOR 4 HYBRID/PROPULSION SYSTEM COOLANT TEMPERATURE SENSOR 5 INSTRUMENT CLUSTER SYSTEM ORG/ WIRE ORG/BLK WIRE PRECHARGE RLY PROXIMITY STATUS SIG 1 RED/GRY WIRE RED/VIO WIRE RED/YEL WIRE RUN/CRANK IGNITION 1 VOLT SECONDARY FUSED BATT POS VOLT SPI BUS 1 (+) SERIAL DATA SPI BUS 3 (+) SERIAL DATA VIO/BLK WIRE VIO/BLU WIRE VIO/GRN WIRE VIO/GRY WIRE VIO/RED WIRE WHT WIRE WHT/BLU WIRE WHT/YEL WIRE YEL/BLU WIRE YEL/VIO WIRE YEL/WHT WIRE