GMC Sierra IV (2018-2022) brn Wiring diagrams

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 AUTO 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 DISPLAY ENGINE COOLANT FAN SWITCH ENGINE COOLANT TEMPERATURE 2 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 RIGHT AIR TEMPERATURE DOOR ACTUATOR START/ STOP SWITCH SYNC 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/BLU WIRE WHT/GRY WIRE WHT/YEL WIRE WINDSHIELD DEFROST IND WINDSHIELD DEFROST SWITCH YEL WIRE YEL/BLK WIRE YEL/GRN WIRE

AC POWER OUTLET AC POWER OUTLET ENABLE SIG AC POWER OUTLET SW SIG AMBIENT LIGHT SENS SIG ANTI-LOCK BRAKES SYSTEM ANTI-LOCK BRAKES, CRUISE CONTROL, EXTERIOR LIGHTS SYSTEMS ANTI-LOCK BRAKES, HEADLIGHTS, INSTRUMENT CLUSTER SYSTEMS BACKUP LAMP RLY CTRL BATT POSITIVE VOLT BATTERY POSITIVE VOLTAGE BLK WIRE BLK/GRN WIRE BLK/VIO WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/VIO WIRE BLU/WHT WIRE BLU/YEL WIRE BODY CONTROL MODULE (UNDER LEFT SIDE OF DASH) BRAKE APPLY SENSOR BRAKE APPLY SENSOR SIG BRN WIRE BRN/BLK WIRE BRN/VIO WIRE BRN/WHT WIRE CARGO LAMP SW SIG COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM CRUISE/ETC/TCC BRAKE SIG CURRENT SENS LOW REF DOOR LOCKS, ANTI-THEFT SYSTEMS ELECTRONIC POWER STEERING SYSTEM POWER DISTRIBUTION SYSTEM EXTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM EXTERIOR LIGHTS, INTERIOR LIGHTS SYSTEMS DOOR LOCKS, ANTI-THEFT SYSTEMS FOG LAMP RLY CTRL FRONT FOOTWELL LIGHTING CTRL GMLAN SERIAL DATA GRN WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/WHT WIRE GROUND 18 GRY WIRE GRY/GRN WIRE GRY/WHT WIRE HAZARD SWITCH SIG HEADLAMP SW OFF SIG HEADLAMP SW ON SIG HEADLAMP SW PARK LAMP SIG HEADLAMP SW REF HEADLAMP SW SIG HEADLIGHTS SYSTEM HIGH BEAM RLY CTRL HORN RLY CTRL HORNS SYSTEM HOT AT ALL TIMES IGNITION MODE SW INDICATOR DIMMING CTRL LAMP DISABLE SW SIG LEFT HEADLAMP RELAY CTRL LEFT MINOR ENDGATE LF TURN SIGNAL LAMP CTRL LH TRAILER TURN SIG LAMP CTRL LIN BUS 4 LR STOP/TURN LAMP CTRL MAJOR ENDGATE HI RELAY CTRL MAJOR ENDGATE LOW RELAY CTRL OUT OF PARK SIGNAL PARK LAMP RLY CTRL POWER DISTRIBUTION SYSTEM READING LAMP CONTROL RECEIVER LOW REF RED/BLU WIRE RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE REMOTE FUNCTION ACTR CTRL REMOTE FUNCTION ACTR TRANSMIT SIG RIGHT FRONT DRL CTRL RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT MINOR ENDGATE RIGHT TRAILER TURN SIG LAMP RUN IGNITION 3 VOLT SECURITY INDICATOR CONTROL SENS LOW REF SERIAL DATA (+) (1) REMOTE FUNC ACTR RECEIVE SIG SERIAL DATA (-) (1) STARTING/CHARGING SYSTEM STEERING COLUMN LK STATUS SIG TASK LAMP SW SIG TRACTION CTRL SW SIG 1 TRAILER BRAKE APPLY SIG TRUNK, TAILGATE, FUEL DOORS SYSTEM VIO/BRN WIRE VIO/GRN WIRE WHT WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/VIO WIRE WIPER SW HIGH SIG WIPER/WASHER SYSTEM YEL WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/GRY 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

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

5-VOLT REF 1 BLK WIRE BLK/BLU WIRE BLK/GRY WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/GRY WIRE BLU/RED WIRE BLU/WHT WIRE BRN WIRE BRN/BLU WIRE BRN/WHT WIRE CAMSHAFT CAMSHAFT POSITION CHARGE IND CTRL CHARGING CRANKSHAFT POSIT SENS CRANKSHAFT POSITION ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) ENGINE CONTROLS IGNITION RELAY ENGINE CTRL SENS EVAPORATIVE EMISSION VENT SOLENOID VALVE GRN WIRE GRN/BLU WIRE GROUND 4 GRY/BLU WIRE HEATED OXYGEN SENS HI SIG BANK 1 SENS (2) HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGN CTRL (4) IGN CTRL (8) INTAKE SENS 1 INTAKE SENS 1 VOLT REF KNOCK SENS SIG 1 KNOCK SENS SIG 2 KNOCK SENSOR #2 KNOCK SENSOR 1 LO SIG BANK 1 SENS 2 NCA WIRE PHASER INTAKE SOL 1 POWER DISTRIBUTION SYSTEM POWER MODULE RED/BRN WIRE RED/VIO WIRE RED/WHT WIRE REPLICATED SIGNAL SENS SIG SOUND SPARK PLUG STARTING/ SYSTEM SYSTEMS THROTT ACTR CTRL OPEN TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK VIO WIRE VIO/BLU WIRE VIO/BRN WIRE VIO/GRN WIRE VIO/GRY WIRE W/ TRAILER INFORMATION WAKE UP SIGNAL WHT WIRE WHT/GRY WIRE WHT/RED WIRE WHT/YEL WIRE YEL WIRE YEL/BLU WIRE YEL/VIO WIRE

BLK/BLU WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/GRY WIRE BLU/VIO WIRE BLU/WHT WIRE BRN WIRE BRN/BLU WIRE BRN/RED WIRE BRN/WHT WIRE CAM PHASER W LO REF CAMSHAFT POSI INTAKE SENS LO REF 1 CAMSHAFT POSITION ACTUATOR SOLENOID VALVE CAMSHAFT POSITION SENSOR CRANKSHAFT POSITION SENSOR CRANKSHAFT POSITION SENSOR LO REF CRANKSHAFT POSITION SENSOR VOLTAGE DIRECT FUEL INJ (DFI) HI VOLT CTRL CYL 1 DIRECT FUEL INJ (DFI) HI VOLT CTRL CYL 2 DIRECT FUEL INJ (DFI) HI VOLT CTRL CYL 3 DIRECT FUEL INJ (DFI) HI VOLT CTRL CYL 4 DIRECT FUEL INJ (DFI) HI VOLT CTRL CYL 5 DIRECT FUEL INJ (DFI) HI VOLT CTRL CYL 6 DIRECT FUEL INJ (DFI) HI VOLT CTRL CYL 7 DIRECT FUEL INJ (DFI) HI VOLT CTRL CYL 8 DIRECT FUEL INJ (DFI) HI VOLT SPLY CYL 1 DIRECT FUEL INJ (DFI) HI VOLT SPLY CYL 2 DIRECT FUEL INJ (DFI) HI VOLT SPLY CYL 3 DIRECT FUEL INJ (DFI) HI VOLT SPLY CYL 4 DIRECT FUEL INJ (DFI) HI VOLT SPLY CYL 5 DIRECT FUEL INJ (DFI) HI VOLT SPLY CYL 6 DIRECT FUEL INJ (DFI) HI VOLT SPLY CYL 7 DIRECT FUEL INJ (DFI) HI VOLT SPLY CYL 8 ENGINE CONTROL MODULE ENGINE CONTROL VEHICLE SENSORS LOW REF 1 ENGINE COOLANT TEMPERATURE SENS SIG FUEL INJECTOR 1 FUEL INJECTOR 2 FUEL INJECTOR 3 FUEL INJECTOR 4 FUEL INJECTOR 5 FUEL INJECTOR 6 FUEL PRESSURE, TEMPERATURE SENSOR FUEL RAIL PRESSURE SENS SIG GENERATOR FIELD DUTY CYCLE SIG GRN WIRE GRN/BLK WIRE GRN/GRY WIRE GRN/WHT WIRE GROUND 4 GRY WIRE GRY/BLU WIRE GRY/RED WIRE HI PRESS FUEL PUMP ACTR HI - CTRL HI PRESSURE FUEL PUMP ACTR LO - CTRL HIGH PRESSURE FUEL PUMP IGNITION CTRL 1 IGNITION CTRL 7 IGNITION CTRL LO REF BANK 1 LOGIC MANIFOLD ABSOLUTE PRESS SENS SIG MANIFOLD ABSOLUTE PRESSURE SENS LO REF OIL TEMPERATURE SENSOR SIGNAL POWERTRAIN MAIN RELAY FUSED SPLY 3 STARTING/ CHARGING SYSTEM THROTTLE POSITION SENS (SENS 1) SIG THROTTLE POSITION SENS LO REF TRANSMISSIONS SYSTEM VIO WIRE VIO/BLK WIRE VIO/BLU WIRE VIO/BRN WIRE VIO/GRN WIRE VIO/GRY WIRE WHT/GRN WIRE WHT/RED WIRE WHT/YEL WIRE YEL WIRE YEL/GRY WIRE YEL/VIO WIRE

BATTERY FUSE BLOCK BLK/BLU WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/VIO WIRE BLK/YEL WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/WHT WIRE BRN WIRE BRN/WHT WIRE CHARGE AIR COOLER OUTLET TEMPERATURE SENSOR COMPUTER DATA LINES SYSTEM CTRL DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROL MODULE ENGINE OIL PRESSURE IND EXHAUST TEMPERATURE SENSOR 1 EXHAUST TEMPERATURE SENSOR 2 EXHAUST TEMPERATURE SENSOR 3 EXHAUST TEMPERATURE SENSOR 4 EXHAUST TEMPERATURE SENSOR 5 FUEL GAUGE IND GRN WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/GRY WIRE GRY/GRN WIRE HOT AT ALL TIMES IND CTRL IND LO SPD GMLAN INSTRUMENT CLUSTER LOGIC LOW CONTROL LOW REFERENCE MALFUNCTION INDICATOR LIGHT RED/VIO WIRE REDUCTANT INJECTOR RELAY CTRL RLY CTRL SHUTDOWN SIGNAL TRANSMISSIONS SYSTEM VALVE HIGH CTRL VIO/BLK WIRE VIO/BLU WIRE VIO/BRN WIRE VIO/GRN WIRE VOLT WAIT TO START IND WHT/GRN WIRE WHT/RED WIRE YEL/BLK WIRE YEL/BLU 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

5-VOLT REFERENCE BLK WIRE BLK/GRN WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA COMPUTER DATA LINES SYSTEM ENGINE OIL LEVEL SWITCH FUEL RAIL PRESSURE SENSOR GND 16 GRN/BLU WIRE GROUND 16 HEATER CONTROL LOW HEATER CTRL IGNITION 1 VOLTAGE 4 LINE HEATER CTRL LINE HEATER LOW CTRL LINES SYSTEM LOGIC LOW REF MODULE WAKE-UP SIG POSITIVE VOLTAGE 34 PRESSURE SENSOR SIG RED WIRE RED/VIO WIRE RED/WHT WIRE REDUCTANT CONTROL MODULE REDUCTANT LINE HEATER REDUCTANT PRESSURE SENSOR REDUCTANT PUMP REDUCTANT PUMP, SENSOR ASSEMBLY (OUTSIDE OF LEFT FRAME, UNDER REAR OF CAB) REDUCTANT SENSOR MODULE REDUCTANT TANK HEATER REDUCTANT TEMPERATURE SENSOR SENSOR 5 VOLT REF SENSOR FEEDBACK SIG SERIAL DATA (-) (1) SERIAL DATA (-) 7 SMART PUMP CONTROL TANK 2 HEATER CTRL TANK HEATER LOW CTRL TEMP SENSOR SIG VIO/BLU WIRE VIO/GRN WIRE VIO/YEL WIRE VOLTAGE PHASE 2 VOLTAGE PHASE 3 WAKE UP SERIAL DATA WHT WIRE YEL WIRE