GMC Sierra IV (2018-2022) w/ dual tank Wiring diagrams

ACC WAKEUP DATA ACC WAKEUP SER DATA ACTIVE GRILLE AIR SHUTTER 1 ACTUATOR ACTIVE GRILLE AIR SHUTTER 2 ACTUATOR AUTOMATIC TRANSMISSION ASSEMBLY AUXILIARY CHASSIS CONTROL MODULE (UNDER CHASSIS, MOUNTED TO REAR CROSSFRAME) BLU WIRE BLU/BRN WIRE CHARGE AIR COOLER COOLANT PUMP COMM ENABLE ENGINE CONTROL MODULE EXHAUST PARTICULATE MATTER SENSOR FUEL PUMP DRIVER CONTROL MODULE GLOW PLUG CONTROL MODULE GRN WIRE GRN/BLU WIRE GRN/VIO WIRE HI SPD SER DATA (+) 7 HI SPD SER DATA (-) 1 HIGH SPEED BUS TERMINATING RESISTOR LATE PRODUCTION EARLY 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 W/ TRANSFER CASE W/ POWER TAKE OFF W/O TRANSFER CASE W/O DUAL TANK W/O INTEGRATED TRAILER BRAKE 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

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

10 SPEED A/T 6 SPEED A/T 6.6L TURBO DIESEL AUTOMATIC TRANSMISSION ASSEMBLY AUXILIARY CHASSIS CONTROL MODULE BLK WIRE BLU/VIO WIRE BODY CONTROL MODULE COLLISION ALERT INDICATORS CONTROL SOLENOID VALVE ASSEMBLY DRIVER BACK SEAT BLOWER MOTOR DRIVER CUSHION SEAT BLOWER MOTOR ELECTRICAL AUXILIARY HEATER ENGINE CONTROL MODULE FROM TRAILER BACKUP LAMPS RELAY (DIAGRAM 7 OF 10) FRONT AXLE ENGAGEMENT ACTUATOR FRONT OVERHEAD CONSOLE ASSEMBLY FUEL PUMP DRIVER CONTROL MODULE GLOW PLUG CONTROL MODULE GRN WIRE GRN/VIO WIRE IGNITION MAIN RELAY INSIDE REAR VIEW MIRROR INSTRUMENT CLUSTER NCA WIRE PASSENGER BACK SEAT BLOWER MOTOR PASSENGER CUSHION SEAT BLOWER MOTOR REAR VIEW CAMERA REDUCTANT CONTROL MODULE RIGHT INSTRUMENT PANEL CENTER ACCESSORY FUNCTION SWITCH SERIAL DATA GATEWAY MODULE STEERING COLUMN LOCK MODULE STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATING CONTROL MODULE TO INSTRUMENT PANEL AUXILIARY FUSE BLOCK (DIAGRAM 10 OF 10) TO RETAINED ACCESSORY POWER RELAY 1 (DIAGRAM 3 OF 10) TRAILER LIGHTING CONTROL MODULE TRANSMISSION CONTROL MODULE VIO WIRE VIO/BLK WIRE VIO/GRN WIRE VIO/GRY WIRE VIO/WHT WIRE W/ BODY EQUIPMENT W/ DUAL TANK W/ FRONT HEATED SEATS W/ INTEGRATED TRAILER BRAKE CONTROL W/O BODY EQUIPMENT W/O DUAL TANK W/O INTEGRATED TRAILER BRAKE CONTROL

BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/YEL WIRE BLU WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/VIO WIRE BLU/WHT WIRE BLU/YEL WIRE BODY CONTROL MODULE BRAKE APPLY BRN WIRE BRN/RED WIRE BRN/WHT WIRE CLUSTER COMPUTER DATA LINES SYSTEM DATA 1 (+) DISABLE SIG FUEL PRESSURE FUEL PRESSURE SENSOR FUEL PUMP FUEL PUMP CTRL FUEL PUMP SUPPLY FUSED BATT GMLAN SERIAL GRN/BLU WIRE GRN/GRY WIRE GRN/WHT WIRE GRY WIRE HI SPD GMLAN HIGH SPD IGN 1 VOLT 4 INSTRUMENT LOW REF PHASE 3 POSITIVE VOLTAGE 53 POWER MODULE PRIMARY FUEL PUMP, LEVEL SENSOR ASSEMBLY RED/BRN WIRE RED/VIO WIRE RELAY CTRL SECONDARY SECONDARY FUEL PUMP SENS 2 LO REF SENS CTRL SENS LO REF SENS LOW REF SENS SIG SENS SIG 2 SERIAL SERIAL DATA (-) 7 SHIELD GND SUPPLY VOLTAGE SYSTEM VIO/BLU WIRE VIO/GRN WIRE VOLTAGE PHASE 2 W/ DUAL TANK W/O DUAL TANK WAKE UP SIG WHT WIRE WHT/BRN WIRE WHT/GRN WIRE YEL WIRE YEL/BRN WIRE YEL/GRY 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

BATTERY POSITIVE VOLTAGE BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/VIO WIRE BLK/YEL WIRE BLU WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/VIO WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/RED WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM COOLING FANS SYSTEM ENGINE CONTROL MODULE FUEL PRESSURE SENSOR FUEL PUMP CTRL FUEL SENSOR SIG GMLAN SERIAL DATA (+) 7 GRN WIRE GRN/BLU WIRE GRN/GRY WIRE GROUND GRY WIRE GRY/GRN WIRE GRY/RED WIRE HOT W/ IGNITION MAIN RELAY ENERGIZED IGNITION 1 VOLTAGE LEVEL SENSOR SIGNAL 2 LOW REF LOW REFERENCE LOW REFERENCE 1 MODE CTRL BACKUP MODULE WAKE-UP SIGNAL PRIMARY RELAY CTRL RED/VIO WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK SENSOR 2 SIGNAL SENSOR 4 SIGNAL SENSOR 5 SIGNAL SENSOR LOW REF SENSOR SIGNAL SENSOR SIGNAL 1 SHIELD GROUND SPEED SIGNAL SW FEEDBACK SIG TEMP LOW REFERENCE TEMP SENSOR 1 TEMP SENSOR 2 TEMP SENSOR 3 TEMPERATURE SIGNAL TRANSMISSIONS SYSTEM VIO/BLK WIRE VIO/BLU WIRE VIO/BRN WIRE VIO/GRN WIRE VOLT SIG A VOLTAGE PHASE 2 VOLTAGE PHASE 3 VOLTAGE REF W/ DUAL TANK W/O DUAL TANK WHT WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/RED WIRE YEL/BLU WIRE YEL/GRN WIRE YEL/GRY WIRE YEL/WHT WIRE

AUXILIARY CHASSIS CONTROL MODULE BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/VIO WIRE BLK/YEL WIRE BLU WIRE BLU/GRN WIRE BLU/VIO WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/RED WIRE BRN/VIO WIRE DIESEL PARTICULATE FILTER EXHAUST DIFFERENTIAL PRESSURE SENSOR EXHAUST GAS RECIRCULATION TEMPERATURE SENSOR 1 EXHAUST GAS RECIRCULATION TEMPERATURE SENSOR 2 FUEL HEATER/WATER IN FUEL SENSOR FUEL PUMP GRN/BLU WIRE GRN/GRY WIRE GRY WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED LOGIC NCA WIRE PRIMARY FUEL LEVEL SENSOR PRIMARY FUEL PUMP, FUEL LEVEL SENSOR ASSEMBLY RED/VIO WIRE RED/WHT WIRE TRAILER LIGHTING CONTROL MODULE UNDERHOOD FUSE BLOCK VIO/BLK WIRE VIO/BLU WIRE VIO/GRN WIRE W/ DUAL TANK W/ INTEGRATED TRAILER BRAKE CONTROL W/O DUAL TANK WHT/BRN WIRE WHT/RED WIRE YEL/BLU WIRE YEL/GRN WIRE YEL/GRY WIRE