Car Wiring Diagrams for 6.6l vin y, computer data lines circuit for GMC Sierra IV (2018-2022)

BATT POS VOLT 33 BLK WIRE BLK/WHT WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/WHT WIRE BLU/YEL WIRE DATA COMM ENABLE DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) GND 18 GRN WIRE GRN/WHT WIRE GRY/GRN WIRE HI SPD GMLAN SERIAL DATA (+) 8 HI SPD GMLAN SERIAL DATA (+) 9 HI SPD GMLAN SERIAL DATA (-) 11 HI SPD GMLAN SERIAL DATA (-) 12 HI SPD GMLAN SERIAL DATA (-) 13 HI SPD SER DATA (-) 2 HOT AT ALL TIMES INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE LO SPD SER DATA LOW SPEED GMLAN SERIAL DATA LOW SPEED GMLAN SERIAL DATA 2 LOW SPEED GMLAN SERIAL DATA 3 RED/VIO WIRE RED/WHT WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK SERIAL DATA GATEWAY MODULE (UNDER LEFT SIDE OF DASH) W/ MULTI COLOR STANDARD W/O MULTI COLOR STANDARD WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE

BLU WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRN/BLK WIRE BRN/BLU WIRE DATA COMM ENABLE ETHERNET BUS 4 (-) ETHERNET BUS 6 (-) ETHERNET BUS 7 (-) GRN WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/WHT WIRE HI SPD GMLAN SERIAL DATA (+) 8 HI SPD GMLAN SERIAL DATA (+) 9 HI SPD GMLAN SERIAL DATA (-) (1) HI SPD GMLAN SERIAL DATA (-) (2) HIGH SPEED EXTENSION BUS 2 TERMINATING RESISTOR HOT W/ IGNITION MAIN RELAY ENERGIZED LO SPD SER DATA 2 LOW LEVEL MID/HIGH LEVEL RADIO RIGHT INSTRUMENT PANEL FUSE BLOCK RUN/CRANK IGNITION 1 VOLTAGE SER DATA COMM ENABLE SERIAL DATA GATEWAY MODULE TRAILER TIRE PRESSURE INDICATOR MODULE VIO/BLK WIRE W/ ONSTAR W/O ONSTAR WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE

AUDIO AMPLIFIER (ON REAR WALL OF PASSENGER COMPT) BLU WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRN/BLK WIRE BRN/BLU WIRE BUS 4 BUS 6 (+) BUS 7 (-) DATA 2 (+) DATA 9 (+) DATA COMM ENABLE ETHERNET GRN WIRE GRN/BLK WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/WHT WIRE HEAD-UP DISPLAY (TOP OF LEFT SIDE OF DASH) HI SPD GMLAN HI SPD SER LIN BUS 1 LO SPD LO SPD SER LOGIC INSTRUMENT CLUSTER LOGIC RIGHT STEERING WHEEL SWITCH LOW LEVEL MID/HIGH LEVEL SER DATA (+) 2 SERIAL DATA (-) 9 STEERING WHEEL AIR BAG COIL TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE VIDEO PROCESSING CONTROL MODULE W/ 360, 270 VIEW VISION W/ HEAD UP DISPLAY W/ ONSTAR W/ PREMIUM AUDIO SPEAKER SYSTEM W/O 360, 270 VIEW VISION W/O HEAD-UP DISPLAY W/O ONSTAR WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE

BLU WIRE BLU/GRY WIRE BLU/YEL WIRE GRN WIRE GRN/BLU WIRE GRN/YEL WIRE HI SPD GMLAN SER DATA (+) 1 HI SPD GMLAN SERIAL DATA (-) (2) HIGH SPEED EXTENSION BUS 1 TERMINATING RESISTOR HVAC CONTROL MODULE HVAC CONTROLS LIN BUS 1 LIN BUS 2 LO SPD LO SPD GMLAN LO SPD GMLAN SER DATA SER DATA SERIAL DATA COMM ENABLE STEERING COLUMN LOCK MODULE STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATING CONTROL MODULE W/O VARIABLE ASSIST POWER STEERING WHT WIRE WHT/BLU WIRE WHT/GRY WIRE

ACCESSORY DC/AC POWER INVERTER MODULE BLU WIRE BLU/YEL WIRE DATA DATA BUS 2 GRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE IMMOBILIZER CONTROL MODULE KEYLESS ENTRY CONTROL MODULE LEFT REAR WINDOW SWITCH LOGIC LIN BUS 1 LIN BUS 4 LO SPD SER DATA NETWORK SER PARKING ASSIST CONTROL MODULE PASSENGER PRESENCE MODULE REAR GATE MODULE REAR SEAT HEATING SWITCH RIGHT REAR WINDOW SWITCH LOGIC SEAT MEMORY CONTROL MODULE TRAILER LIGHTING CONTROL MODULE VIO/YEL WIRE WAKE-UP SERIAL WHT WIRE WHT/BLU WIRE

ACCESSORY WAKEUP BLU WIRE BLU/WHT WIRE BLU/YEL WIRE BODY CONTROL MODULE (UNDER LEFT SIDE OF DASH) DATA BUS 1 DATA BUS 11 DATA BUS 15 DATA BUS 2 DATA BUS 3 DATA BUS 4 DATA BUS 8 DRIVER WINDOW MOTOR LOGIC DRIVER WINDOW/ OUTSIDE REARVIEW MIRROR SWITCH FRONT SEAT HEATING CONTROL MODULE GRN WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE HI SPD SER (+) 1 HI SPD SER (-) 5 LEFT SIDE OBJECT SENSOR MODULE LO SPD LO SPD SER DATA NETWORK SER PASSENGER WINDOW MOTOR LOGIC PASSENGER WINDOW SWITCH LOGIC REAR SEAT HEATING CONTROL MODULE RIGHT SIDE OBJECT SENSOR MODULE SER COMM ENABLE SER DATA SUNROOF MOTOR VIO WIRE VIO/YEL WIRE W/ EXPRESS UP/DOWN W/O VARIABLE ASSIST POWER STEERING WHT WIRE WHT/BLU WIRE YEL WIRE

ACC WAKEUP DATA ACC WAKEUP SER DATA BLU WIRE BLU/YEL WIRE DATA COMM ENABLE ELECTRONIC BRAKE CONTROL MODULE (BEHIND UNDERHOOD FUSE BLOCK) HI SPD SER DATA (-) 1 HI SPD SER DATA (-) 2 TRANSFER CASE CONTROL MODULE (BEHIND LEFT HEADLIGHT) VIO/YEL WIRE W/ ONSTAR W/ POWER TAKE OFF W/ TRANSFER CASE W/ POWER TAKE OFF W/O TRANSFER CASE W/O ONSTAR W/O POWER TAKE OFF W/O VARIABLE ASSIST POWER STEERING WHT WIRE WHT/BLU WIRE

ACC WAKEUP DATA ACTIVE GRILLE AIR SHUTTER 1 ACTUATOR ACTIVE GRILLE AIR SHUTTER 2 ACTUATOR AUXILIARY CHASSIS CONTROL MODULE (UNDER CHASSIS, MOUNTED TO REAR CROSSFRAME) BLU WIRE BLU/BRN WIRE CHARGE AIR COOLER COOLANT PUMP COMM ENABLE EARLY PRODUCTION ENGINE CONTROL MODULE EXHAUST PARTICULATE MATTER SENSOR FUEL PUMP DRIVER CONTROL MODULE GLOW PLUG CONTROL MODULE (TOP OF ENGINE) GRN WIRE GRN/BLU WIRE GRN/VIO WIRE HI SPD SER DATA (+) 7 HI SPD SER DATA (-) 1 HI SPD SER DATA (-) 1 ACC WAKEUP DATA HI SPD SER DATA (-) 1 ACC WAKEUP SER DATA HIGH SPEED BUS TERMINATING RESISTOR LATE PRODUCTION NETWORK SER DATA BUS 21 NITROGEN OXIDES SENSOR 1 NITROGEN OXIDES SENSOR 2 POWER TAKE-OFF CONTROL MODULE REDUCTANT CONTROL MODULE (UNDER CHASSIS, ON DEF TANK) TRAILER BRAKE CONTROL SWITCH TRAILER BRAKE POWER CONTROL MODULE TRANSMISSION CONTROL MODULE TURBOCHARGER VANE POSITION ACTUATOR VIO WIRE VIO/YEL WIRE W/ DUAL TANK W/ POWER TAKE OFF CONTROL MODULE W/ POWER TAKE OFF W/ TRANSFER CASE W/ POWER TAKE OFF W/O TRANSFER CASE W/O DUAL TANK W/O INTEGRATED TRAILER BRAKE W/O POWER TAKE OFF CONTROL MODULE W/O VARIABLE ASSIST POWER STEERING WHT WIRE WHT/BLU WIRE YEL WIRE