GMC Sierra IV (2018-2022) yel Wiring diagrams

BATTERY POSITIVE VOLT BLK WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/VIO WIRE BLU/YEL WIRE BRAKE FLUID LEVEL SENS SIG BRAKE FLUID LEVEL SWITCH BRAKE PRESSURE MODULATOR BRN WIRE BRN/BLU WIRE COMPUTER DATA LINES SYSTEM ELECTRONIC BRAKE CONTROL MODULE (BEHIND UNDERHOOD FUSE BLOCK) GRN/BRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/BRN WIRE GRY/RED WIRE GRY/WHT WIRE HI SPD GMLAN SERIAL DATA (-) (1) HI SPD GMLAN SERIAL DATA (-) (2) HOT AT ALL TIMES LEFT FRONT WHEEL SPEED SENSOR LEFT PARK BRAKE ACTUATOR LEFT REAR BRAKE PAD WEAR SENSOR LF WHEEL SPD SENS CTRL LF WHEEL SPD SENS SIG LR PARK BRAKE MOTOR APPLY CTRL LR PARK BRAKE MOTOR LOW REF LR WHEEL SPD SENS CTRL LR WHEEL SPD SENS SIG NCA WIRE ORG/ WIRE PARK BRAKE APPLY SW SIG PARK BRAKE APPLY SW VOLT REF PARK BRAKE CONTROL SWITCH (ON PARK BRAKE PEDAL ASSEMBLY) PARK BRAKE REL SW SIG PARK BRAKE REL SW VOLT REF PARK BRAKE SW SIG PARK BRAKE SW SPLY VOLT RED/VIO WIRE RED/YEL WIRE RF WHEEL SPD SENS CTRL RF WHEEL SPD SENS SIG RIGHT PARK BRAKE ACTUATOR RR PARK BRAKE MOTOR APPLY CTRL RR PARK BRAKE MOTOR LOW REF GND RR WHEEL SPD SENS CTRL RR WHEEL SPD SENS SIG SERIAL DATA COMM ENABLE TAN WIRE TRACTION CONTROL SWITCH UNDERHOOD FUSE BLOCK VEHICLE SPEED SIGNAL 4 VEHICLE STABILITY CONTROL SWITCH WHT WIRE WHT/BLU WIRE YEL WIRE YEL/RED WIRE

6.6L (VIN 7) 6.6L VIN Y TURBO DIESEL ABS IND. BATT POSITIVE VOLT BLK WIRE BLK/BRN WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/VIO WIRE BLU/YEL WIRE BODY CONTROL MODULE (UNDER LEFT SIDE OF DASH) BRAKE APPLY SENS CTRL BRAKE APPLY SENS LOW REF BRAKE APPLY SENS SIG BRAKE IND BRAKE PEDAL POSITION SENSOR (BEHIND BRAKE PEDAL ASSEMBLY) BRAKE POSITION SENS LOW REF BRAKE POSITION SENS SIG COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROL MODULE GRN/BRN WIRE GRY/BLK WIRE GRY/BRN WIRE GRY/GRN WIRE HI SPD GMLAN HI SPD GMLAN SERIAL DATA (-) (1) HILL DESCENT CONTROL SWITCH HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT CLUSTER LEFT FRONT BRAKE PAD WEAR SENSOR LEFT REAR WHEEL SPEED SENSOR LOGIC LOW SPD GMLAN SER DATA NCA WIRE ORG/ WIRE RIGHT FRONT WHEEL SPEED SENSOR RIGHT INSTRUMENT PANEL CENTER ACCESSORY FUNCTION SWITCH RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT REAR WHEEL SPEED SENSOR RUN/CRANK IGN 1 VOLT 16 SERIAL DATA (-) (1) STEERING WHEEL ANGLE SENSOR TAN WIRE TCS IND TCS OFF IND TRACTION CONTROL SW SIG 1 VIO/BLK WIRE WHT WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE

ANTI-LOCK BRAKES SYSTEM EXTERIOR LIGHTS SYSTEM BLK WIRE BLU WIRE BLU/GRY WIRE BLU/VIO WIRE BODY CONTROL MODULE (LEFT END OF DASH) BRN WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CARGO BED LAMP CTRL COMPUTER DATA LINES SYSTEM COURTESY LAMP SW SIG DOOR LOCK ACTUATOR LOCK CTRL DOOR LOCK ACTUATOR LOCK CTRL 2 DOOR LOCK ACTUATOR UNLOCK CTRL DOOR LOCK KEY SW UNLOCK SIG DOOR LOCKS SYSTEM DOOR LOCKS, EXTERIOR LIGHTS, INTERIOR LIGHTS SYSTEMS DRIVER DOOR LOCK SW LOCK SIG DRIVER DOOR LOCK SW UNLOCK SIG GRN/BLU WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/WHT WIRE GRN/YEL WIRE GROUND GRY WIRE GRY/BLU WIRE HI SPEED GMLAN SER DATA (-) 1 INADVERTENT POWER CTRL LED AMBIENT LIGHTING CTRL 1 LED BACKLIGHT DIMMING CTRL LEFT TAIL LAMP OUTAGE DETECTION SIG LF DOOR AJAR SW SIG FRONT TURN LAMP FEEDBACK SIG LOCAL INTERCONNECT NETWORK BUS SERIAL DATA 3 LOCAL INTERCONNECT NETWORK SERIAL DATA BUS 1 LOCAL INTERCONNECT NETWORK SERIAL DATA BUS 2 MAJOR ENDGATE RELEASE SW SIG EXTERIOR MAJOR ENDGATE RELEASE SW SIG INTERIOR MINOR ENDGATE HIGH RELAY CTRL MINOR ENDGATE LOW RELAY CTRL MINOR ENDGATE RELEASE SW DISCRETE SIG EXTERIOR PASSENGER DOOR LOCK SW LOCK CTRL PASSENGER DOOR LOCK SW UNLOCK CTRL POWER DISTRIBUTION SYSTEM PUDDLE LAMP CTRL RF TURN LAMP FEEDBACK SIG RF DOOR AJAR SW SIG RIGHT TAIL LAMP OUTAGE DETECTION SIG SHIFT INTERLOCK SOLENOID CTRL SHIFT INTERLOCK, TRANSMISSIONS SYSTEMS SHIFT SELECT SW PARK SI SHIFT SELECT SW PERFORMANCE SIG 16 17 TRAILER BRAKE APPLY SIG STANDING LAMP RLY CTRL SURVEILLANCE SW SIG TRANSMISSIONS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM VIO/YEL WIRE WHT WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/GRY WIRE WHT/VIO WIRE WHT/YEL WIRE WIRELESS CHARGING SYSTEM FAULT INDICATOR CTRL YEL WIRE YEL/BLK WIRE YEL/VIO WIRE YEL/WHT WIRE

2.7L TURBO 3.0L TURBO DIESEL B+ VOLT BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/YEL WIRE BLOCK ENGINE COOLANT FLOW CONTROL VALVE BLU WIRE BLU/BRN WIRE BRN WIRE BRN/YEL WIRE COMPUTER DATA COMPUTER DATA LINES SYSTEM ENGINE COOLANT BYPASS VALVE ENGINE COOLANT FLOW CONTROL VALVE (2.7L TURBO, 3.0L TURBO DIESEL) ENGINE COOLANT TEMPERATURE SENSOR 1 ENGINE COOLANT TEMPERATURE SENSOR 5 ENGINE COOLANT TEMPERATURE SENSOR 6 FAN RLY CTRL GRN/BRN WIRE GRY WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/VIO WIRE HEATER COOLANT PUMP HI SPD COOLING J157 (2.7L TURBO) LINES SYSTEM LOGIC LOWER COOLING FAN MOTOR MAIN ENGINE COOLANT FLOW CONTROL VALVE NCA WIRE RED WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE RIGHT COOLING FAN MOTOR VIO/BLU WIRE WHT/RED WIRE YEL WIRE YEL/BLU WIRE

3.0L TURBO DIESEL ACCEL PEDAL POS LO REF 1 ACCEL PEDAL POS SIG 1 ACCL PEDAL POS 5 VOLT REF 1 ACCL PEDAL POS 5 VOLT REF 2 ACCL PEDAL POS LOW REF 2 ACCL PEDAL POS SIG 2 ADAPTIVE CRUISE CTRL GAP UP/DOWN SW SIG CRUISE CTRL SET/COAST/ RES/ACC SW SIG BATT POS VOLT BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/GRY WIRE BLK/VIO WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BLU/YEL WIRE BRK APPLY SENS CTRL BRK APPLY SENS LOW REF BRK APPLY SENS SIG BRK POSI SENS SIG BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CRUISE/ETC/TCC BRAKE SIGNAL ENG CTRL SENS 5 VOLT REF (3) ENG CTRL SENS 5 VOLT REF 2 ENGINE CONTROL MODULE (BEHIND LEFT HEADLAMP ASSEMBLY) EXCEPT 2.7L TURBO 2.7L TURBO EXCEPT 3.0L TURBO DIESEL GRN/WHT WIRE GROUND GRY/GRN WIRE HI SPD GMLAN SRL DATA (-) (1) HIGH SPEED GMLAN DATA (-) 1 HOT AT ALL TIMES LOGIC LOW REFERENCE RED/BLU WIRE RED/BRN WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK SIG GND THRTL ACTR CTRL CLOSE THRTL ACTR CTRL OPEN THRTL POS SENS 5 VOLT REF THRTL POS SENS SIG 1 UNDERHOOD FUSE BLOCK WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/WHT WIRE

AUTOMATIC TRANSMISSION ASSEMBLY AUTOMATIC TRANSMISSION ASSEMBLY (6 SPEED A/T) BLK WIRE BLU WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY CRUISE IND DRIVER INFORMATION CENTER DISPLAY GRN WIRE GRN/VIO WIRE GRN/YEL WIRE GRY/BLU WIRE GRY/GRN WIRE HI SPD GMLAN SERIAL DATA (-) (1) INPUT SPD SIG INSTRUMENT CLUSTER LO SPD GMLAN SERIAL DATA LOGIC NCA WIRE OUTPUT SPD SIG RED WIRE TRANS I/P SPEED SENS SIG TRANS INTERMEDIATE SPD SIG TRANSMISSION CONTROL MODULE TRANSMISSION CONTROL MODULE (10 SPEED A/T) (BEHIND LEFT CORNER OF THE RADIATOR) TRANSMISSION CONTROL MODULE (8 SPEED A/T) (BEHIND LEFT CORNER OF THE RADIATOR) TRANSMISSION INPUT SHAFT SPEED SENSOR TRANSMISSION INTERMEDIATE SHAFT SPEED SENSOR TRANSMISSION INTERMEDIATE SPEED SENSOR 1 TRANSMISSION INTERMEDIATE SPEED SENSOR 2 TRANSMISSION OUTPUT SHAFT SPEED SENSOR VIO/GRN WIRE WHT WIRE WHT/BLU WIRE WHT/VIO WIRE YEL WIRE YEL/BLU WIRE YEL/GRN WIRE YEL/ORG WIRE

BATT POS VOLT BLK WIRE BLU/VIO WIRE BODY CONTROL MODULE (UNDER LEFT SIDE OF DASH) BRN WIRE BRN/VIO WIRE CENTER PICKUP BOX ENDGATE LATCH COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY EXTERIOR PICKUP BOX ENDGATE CONTROL SWITCH GRN WIRE GRN/BLK WIRE GROUND GRY WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT INSTRUMENT PANEL FUSE BLOCK LEFT PICKUP BOX ENDGATE LATCH LEFT PICKUP BOX ENDGATE LATCH RELAY LO SPD GMLAN SERIAL DATA LOCAL INTERCONNECT NETWORK SERIAL DATA BUS 12 LOGIC MAJOR ENDGATE HIGH RELAY CONTROL MAJOR ENDGATE LOW RELAY CONTROL MAJOR ENDGATE REL SW DISCRETE SIG EXTR MAJOR ENDGATE REL SW SIG EXTR MAJOR ENDGATE REL SW SIG INTR PICKUP BOX ENDGATE UNLATCH SWITCH RED/BLU WIRE RIGHT END OF DASH) RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT PICKUP BOX ENDGATE LATCH RIGHT PICKUP BOX ENDGATE LATCH RELAY VEHICLE STABILITY CONTROL SWITCH W/ ENHANCED WHT/GRN WIRE YEL WIRE YEL/BLK WIRE

BATT POS VOLT BLK WIRE BLK/GRN WIRE BLK/VIO WIRE BLU WIRE BLU/BLK WIRE BLU/GRY WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY ENDGATE REL SW ANALOG SIG INTERIOR ENDGATE REL SW DISCRETE SIG EXTERIOR EXTERIOR PICKUP BOX ENDGATE CONTROL SWITCH GRN WIRE GRN/BLK WIRE GRY WIRE GRY/BLK WIRE GRY/VIO WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT INSTRUMENT PANEL FUSE BLOCK LEFT PICKUP BOX ENDGATE LATCH LOCAL INTERCONNECT NETWORK SERIAL DATA BUS 12 LOGIC LOW SPEED GMLAN SERIAL DATA ORG/WHT WIRE PICKUP BOX ENDGATE CONTROL MODULE (IN UPPER LEFT SIDE OF ENDGATE) PICKUP BOX ENDGATE POWER ASSIST ACTUATOR (LOWER RIGHT CORNER OF ENDGATE) PNK WIRE PNK/BLK WIRE REAR CLOSURE CINCH LATCH MTR 2 CINCH CTRL REAR CLOSURE CINCH LATCH MTR 2 REL CTRL REAR CLOSURE CINCH LATCH MTR CLOSE CTRL REAR CLOSURE CINCH LATCH MTR OPEN CTRL REAR CLOSURE CLUTCH CTRL REAR CLOSURE CLUTCH RETURN REAR CLOSURE LATCH 2 PAWL STATUS REAR CLOSURE LATCH 2 RACHET STATUS REAR CLOSURE LATCH 2 SECTOR STATUS REAR CLOSURE LATCH 2 UNLATCH STATUS REAR CLOSURE LATCH PAWL STATUS SIG REAR CLOSURE LATCH RATCHET STATUS REAR CLOSURE LATCH UNLATCH STATUS REAR CLOSURE OBJECT SENS LOW REF REAR CLOSURE OPEN SWITCH SIG REAR CLOSURE OPEN/CLOSE MTR CLOSE CTRL REAR CLOSURE OPEN/CLOSE MTR OPEN CTRL REAR CLOSURE POSITION SENS LOW REF REAR CLOSURE POSITION SENS SIG 1 REAR CLOSURE POSITION SENS SIG 2 REAR CLOSURE POSITION SENS VOLTAGE REF REAR CLOSURE SENS LOW REF 2 RED/GRY WIRE RIGHT PICKUP BOX ENDGATE LATCH VEHICLE STABILITY CONTROL SWITCH VIO WIRE WHT WIRE YEL WIRE YEL/RED WIRE

BATT POS VOLT BLK WIRE BODY CONTROL MODULE (UNDER LEFT SIDE OF DASH) BRN/BLK WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY EXTERIOR PICKUP BOX ENDGATE CONTROL SWITCH GRN WIRE GRN/BLK WIRE GROUND GRY/BLU WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT INSTRUMENT PANEL FUSE BLOCK LEFT PICKUP BOX AUXILIARY ENDGATE LATCH LEFT PICKUP BOX AUXILIARY ENDGATE LATCH RELAY LH MINOR ENDGATE AJAR SIG LO SPD GM LAN SERIAL DATA LOCAL INTERCONNECT NETWORK SERIAL DATA BUS 12 LOGIC MINOR ENDGATE HI RLY CTRL MINOR ENDGATE LOW RLY CTRL MINOR ENDGATE REL SWITCH DISCRETE SIGNAL EXTERIOR RED/BLU WIRE RH MINOR ENDGATE AJAR SIG RIGHT END OF DASH) RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT PICKUP BOX AUXILIARY ENDGATE LATCH RIGHT PICKUP BOX AUXILIARY ENDGATE LATCH RELAY VIO WIRE WHT/BRN WIRE WHT/GRY WIRE YEL WIRE YEL/BLU WIRE

ASSIST STEP CONTROL MODULE BATT POS VOLT BLK WIRE BLK/BLU WIRE BLU WIRE BLU/GRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM GRN WIRE GRN/RED WIRE GRY WIRE HOT AT ALL TIMES LEFT ASSIST STEP LEFT ASSIST STEP KICK SWITCH LH RUNNING BOARD KICK SW SIG LH RUNNING BOARDS MTR LH RUNNING BOARDS MTR CTRL EXTEND LH RUNNING BOARDS MTR CTRL RETRACT LH RUNNING BOARDS MTR HALL SENS LOW REF LH RUNNING BOARDS MTR HALL SENS SIG LO SPD GMLAN SERIAL DATA NCA WIRE ORG/ WIRE ORG/WHT WIRE RED WIRE RED/YEL WIRE RH RUNNING BOARD KICK SW SIG RH RUNNING BOARDS MTR RH RUNNING BOARDS MTR CTRL EXTEND RH RUNNING BOARDS MTR CTRL RETRACT RH RUNNING BOARDS MTR HALL SENS SIG RIGHT ASSIST STEP RIGHT ASSIST STEP KICK SWITCH RIGHT INSTRUMENT PANEL CENTER ACCESSORY FUNCTION SWITCH RUNNING BOARDS DISABLE SIG UNDERHOOD FUSE BLOCK VIO WIRE VIO/RED WIRE WHT WIRE WHT/BRN WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE YEL/WHT WIRE