GMC Sierra III facelift (2015-2018) underhood fuse block Wiring diagrams

2/- ABS PUMP FUSE ABS VLV FUSE BATT POSITIVE VOLT BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/YEL WIRE BRAKE BOOSTER VACUUM SENSOR BRAKE FLUID LEVEL SENS SIG BRAKE FLUID LEVEL SWITCH BRAKE PRESSURE MODULATOR BRAKE VACUUM SENS 5 VOLT REF BRAKE VACUUM SENS LOW REF BRAKE VACUUM SENS SIG CMBD VHCE IN SENS SPLY VOLT COMPUTER DATA LINES SYSTEM DK BLU WIRE ELECTRONIC BRAKE CONTROL MODULE (ON LEFT SIDE OF FRAME ASSEMBLY) EXCEPT BASE EQUIPMENT BASE EQUIPMENT GMLAN GMLAN SERIAL DATA - 1 GMLAN SERIAL DATA 2 GRN/GRY WIRE GRY WIRE GRY/BLK WIRE GRY/BRN WIRE GRY/WHT WIRE GRY/YEL WIRE HOT AT ALL TIMES INSTRUMENT PANEL JUNCTION BLOCK LEFT FRONT WHEEL SPEED SENSOR LEFT REAR WHEEL SPEED SENSOR LF WHL SPD SENS CTRL LF WHL SPD SENS SIG LR WHL SPD SENS CTRL LR WHL SPD SENS SIG LT GRN/BRN WIRE LT GRN/GRY WIRE NCA WIRE RED/VIO WIRE RED/YEL WIRE RF WHL SPD SENS CTRL RF WHL SPD SENS SIG RR WHL SPD SENS CTRL RR WHL SPD SENS SIG SENS SERIAL DATA COMM ENABLE SPLY VOLT STEERING WHEEL ANGLE SENSOR (ON STEERING COLUMN) UNDERHOOD FUSE BLOCK VEHICLE SPD SIG VIO WIRE WHT WIRE WHT/DK BLU WIRE YEL WIRE YEL/PPL WIRE YEL/RED WIRE

A/C CMPRSR MDL/BATT RVC FUSE BATT POS VOLT BATTERY BATTERY CURRENT SENSOR BATTERY FUSE BLOCK BLK WIRE BLK/VIO WIRE BLK/WHT WIRE BLU WIRE BLU/VIO WIRE BODY CONTROL MODULE BRN WIRE CHARGE IND CHARGE IND CTRL COMPUTER DATA LINES SYSTEM CURRENT SENS LOW REF CURRENT SENS SIG CURRENT SENS SPLY VOLT DK BLU WIRE DRIVER INFORMATION CENTER DISPLAY ECM IGN FUSE ENGINE CONTROL MODULE EXCEPT BASE EQUIPMENT BASE EQUIPMENT FUSE 2 GENERATOR GENERATOR FIELD DUTY CYCLE SIG GRN WIRE GRY WIRE GRY/GRN WIRE HI SPD GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT CLUSTER INSTRUMENT PANEL JUNCTION BLOCK IPC FUSE LEFT INSTRUMENT PANEL FUSE BLOCK LOGIC LOW SPD GM LAN SERIAL DATA LT GRN WIRE PPL PPL/LT GRN WIRE RED WIRE RED/GRY WIRE RED/YEL WIRE RUN/CRANK IGN 1 VOLT UNDERHOOD FUSE BLOCK VIO WIRE WHT WIRE WHT/YEL WIRE YEL WIRE

A/C CMPRSR MDL/BATT RVC FUSE BATT POS VOLT BLK WIRE BODY CONTROL MODULE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY EXHAUST BRAKE IND EXHAUST BRK SW CTRL EXHAUST BRK SW SIG GRN/WHT WIRE GRN/YEL WIRE GRY/GRN WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER INSTRUMENT PANEL MULTI- FUNCTION SWITCH LOGIC LOW SPD GMLAN RED/YEL WIRE SER DATA UNDERHOOD FUSE BLOCK WHT WIRE

BATTERY POSITIVE VOLT BLK WIRE BLK/DK BLU WIRE BLK/GRY WIRE BLK/LT GRN WIRE BLK/YEL WIRE BLU/YEL WIRE BRN WIRE BRN/RED WIRE BRN/VIO WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/RED WIRE DRIVER INFORMATION CENTER DISPLAY ESC ELC EXH FUSE GMLAN SER DATA (-) (2) GMLAN SER DATA - (1) GRY/GRN WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT FRONT SHOCK ABSORBER ACTUATOR LEFT FRONT SHOCK ABSORBER ASSEMBLY LEFT FRONT SUSPENSION POSITION SENSOR LEFT REAR SHOCK ABSORBER ACTUATOR LEFT REAR SHOCK ABSORBER ASSEMBLY LEFT REAR SUSPENSION POSITION SENSOR LF DECREASE DAMPING CTRL LF INCREASE DAMPING CTRL LF STRUT POS SENS LOW REF LF STRUT SENS SIG LO SPD GMLAN SERIAL DATA 2 LOGIC LR STRUT MOTOR DECREASE LR STRUT MOTOR INCREASE LR STRUT SENS LOW REF LR STRUT SENS SIG LT GRN/GRY WIRE LT GRN/RED WIRE LT GRN/WHT WIRE NCA WIRE RED/LT GRN WIRE RF DECREASE DAMPING CTRL RF INCREASE DAMPING CTRL RF STRUT SENS LOW REF RF STRUT SENS SIG RIGHT FRONT SHOCK ABSORBER ACTUATOR RIGHT FRONT SHOCK ABSORBER ASSEMBLY RIGHT FRONT SUSPENSION POSITION SENSOR RIGHT REAR SHOCK ABSORBER ACTUATOR RIGHT REAR SHOCK ABSORBER ASSEMBLY RIGHT REAR SUSPENSION POSITION SENSOR RR STRUT MOTOR DECREASE RR STRUT MOTOR INCREASE RR STRUT POS SENS SIG RR STRUT SENS LOW REF SER DATA COMM ENABLE SUSPENSION CONTROL MODULE UNDERHOOD FUSE BLOCK VIO WIRE WHT WIRE WHT/BLK WIRE WHT/DK BLU WIRE WHT/GRY WIRE WHT/LT GRN WIRE YEL WIRE YEL/RED WIRE YEL/WHT WIRE

6.0L 6.0L (VIN G) ACC IGN VOLT AUXILIARY CHASSIS CONTROL MODULE BASE EQUIPMENT EXCEPT BASE EQUIPMENT BLK WIRE BODY CONTROL MODULE CHASSIS CONTROL MODULE CHG IND CTRL DK BLU WIRE DLIS FUSE DRIVER SEAT ADJUSTER SWITCH DRIVER WINDOW MOTOR DRVR PWR SEAT FUSE ECM IGN FUSE ENGINE CONTROL MODULE ENGINE CONTROLS IGNITION RELAY EXTENDED CAB CREW CAB FROM ACCY PWR MDL/TPIM PUMP FUSE (DIAGRAM 3 OF 7) FROM LEFT INSTRUMENT PANEL FUSE BLOCK (DIAGRAM 6 OF 7) FROM UNDERHOOD FUSE BLOCK (DIAGRAM 3 OF 7) FRONT AXLE ENGAGEMENT ACTUATOR FUEL PUMP 2 FUSE FUEL PUMP DRIVER CONTROL MODULE GARAGE DOOR OPENER GLOW PLUG CONTROL MODULE GRN WIRE GRN/VIO WIRE IGNITION MAIN RELAY IGNITION SWITCH J124 (6.0L) J123 (6.6L) KEY-IN IGNITION SWITCH LEFT INSTRUMENT PANEL FUSE BLOCK LEFT REAR WINDOW SWITCH LT DRS FUSE MISC IGN FUSE MOBILE DEVICE WIRELESS CHARGER MODULE OFF PNK WIRE PPL/LT GRN WIRE RED WIRE RED/BLU WIRE RED/DK BLU WIRE RED/YEL WIRE ROOF BEACON SWITCH RUN WIRE SEAT MEMORY CONTROL MODULE SECONDARY FUEL PUMP RELAY TO CONFIGURABLE PROVISION RELAY 4 (DIAGRAM 7 OF 7) TO PRK ENBL/ EAP FUSE (DIAGRAM 6 OF 7) TRANS IGN FUSE TRANSMISSION CONTROL MODULE UGDO/ ISRVM FUSE UNDERHOOD FUSE BLOCK VIO/BLK WIRE VIO/LT GRN WIRE VIO/WHT WIRE VIO/YEL WIRE W/ ROOF MOUNTED PROVISION W/O ROOF MOUNTED PROVISION WHT/BLK WIRE WHT/VIO WIRE

6.0L 6.0L (VIN B) 6.0L (VIN G) A/C COMPRESSOR CLUTCH RELAY A/T ABS PUMP FUSE ABS VLV FUSE AC CLTCH FUSE ACCY PWR MDL/TPIM PUMP FUSE AHA/AHA RVC (6.0L) A/C CMPRSR MDL/BATT RVC (6.6L) FUSE ALTERNATIVE FUEL FUSE HOLDER 1 ALTERNATIVE FUEL FUSE HOLDER 2 ALTERNATIVE FUEL INJECTOR RELAY ALTERNATIVE FUEL SYSTEM DATA CONNECTOR ASSIST STEP CONTROL MODULE AUXILIARY CHASSIS CONTROL MODULE BASE EQUIPMENT BLUNT CUT) BODY CONTROL MODULE CHASSIS CONTROL MODULE CNG CONTROL MODULE ELC RNG BDS FUSE ELEC PRK BRK FUSE ELECTRONIC BRAKE CONTROL MODULE ENGINE CONTROL MODULE ESC ELC EXH FUSE EVAPORATIVE EMISSION VENT SOLENOID VALVE EXCEPT BASE EQUIPMENT FPPM FUSE FROM AUXILIARY BATTERY FUSE BLOCK (DIAGRAM 1 OF 7) FROM BATTERY FUSE BLOCK (DIAGRAM 1 OF 7) FRONT FOG LAMP RELAY FRT/WPR FUSE FUEL HEATER FUSE FUEL HEATER RELAY FUEL PUMP DRIVER CONTROL MODULE FUEL PUMP FUSE FUEL PUMP RELAY FUSE HEADLAMP HIGH BEAM RELAY HORN RELAY I/P BEC 1 FUSE I/P BEC 2 FUSE ICCM FUSE INSTRUMENT PANEL JUNCTION BLOCK INT HTR FUSE LEFT TRAILER STOP/TURN SIGNAL LAMP RELAY LT GRN WIRE MSB DRVR FUSE MSB PASS FUSE REAR DEFOGGER RELAY RED WIRE RED/BRN WIRE RED/DK BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/LT GRN WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE REDUCTANT CONTROL MODULE RIGHT TRAILER STOP/TURN SIGNAL LAMP RELAY STARTER RELAY STOP LAMP RELAY STRTR FUSE SUSPENSION CONTROL MODULE TCM/ECM FUSE TO AUXILIARY BATTERY RELAY 1 (DIAGRAM 1 OF 7) TO ENGINE CONTROLS IGNITION RELAY (DIAGRAM 2 OF 7) TO LEFT INSTRUMENT PANEL FUSE BLOCK (DIAGRAM 2 OF 7) TO LEFT INSTRUMENT PANEL FUSE BLOCK (DIAGRAM 4 OF 7) TRAILER BACKUP LAMPS RELAY TRAILER BRAKE POWER CONTROL MODULE TRAILER BRAKE PROVISION TRAILER CAMPER PROVISION TRAILER CONNECTOR TRAILER PARK LAMPS RELAY TRANSFER CASE CONTROL MODULE TRANSMISSION CONTROL MODULE TRLR BATT FUSE TRLR BRK FUSE UNDERHOOD FUSE BLOCK W/ AUXILIARY BATTERY W/ SPECIAL EQUIPMENT W/O AUXILIARY BATTERY W/O SPECIAL EQUIPMENT WINDSHIELD WASHER PUMP RELAY WINDSHIELD WIPER RELAY WINDSHIELD WIPER SPEED CONTROL RELAY

ACCY/RUN CRNK FUSE APO 1/LTR FUSE APO 2 FUSE APO 3 FUSE APO 4 FUSE APO/BATT FUSE APO/RAP FUSE BLK WIRE BODY CONTROL MODULE CENTER CONSOLE COMPARTMENT ACCESSORY POWER RECEPTACLE CENTER CONSOLE REAR ACCESSORY POWER RECEPTACLE CENTER SEAT ACCESSORY POWER RECEPTACLE COLLISION ALERT INDICATORS ELECTRICAL AUXILIARY HEATER FORWARD ADJUSTABLE PEDAL RELAY FROM LT DRS FUSE (DIAGRAM 2 OF 7) FROM USB/OBS DET FUSE (DIAGRAM 5 OF 7) GRN/VIO WIRE GRY WIRE GRY/VIO WIRE HTD WHL FUSE HVAC CONTROL MODULE HVAC/AUX HVAC IGN FUSE IGNITION MAIN RELAY INSIDE REAR VIEW MIRROR INSTRUMENT CLUSTER INSTRUMENT PANEL 1 ACCESSORY POWER RECEPTACLE INSTRUMENT PANEL 2 ACCESSORY POWER RECEPTACLE INSTRUMENT PANEL ACCESSORY POWER RECEPTACLE INSTRUMENT PANEL JUNCTION BLOCK INSTRUMENT PANEL MULTI- FUNCTION SWITCH IPC IGN/SDM IGN FUSE LEFT INSTRUMENT PANEL FUSE BLOCK NCA WIRE PASSENGER AIR BAG DISABLED INDICATOR PRK ENBL/ EAP FUSE REAR VIEW CAMERA REARWARD ADJUSTABLE PEDAL RELAY RED WIRE RED/BRN WIRE RED/WHT WIRE RETAINED ACCESSORY POWER RELAY 1 RETAINED ACCESSORY POWER RELAY 2 RIGHT INSTRUMENT PANEL FUSE BLOCK SEO ALC FUSE SEO RAP FUSE SLIDING REAR WINDOW SWITCH SPARE FUSE STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATING CONTROL MODULE SUNROOF MOTOR TO MOBILE DEVICE WIRELESS CHARGER MODULE (DIAGRAM 2 OF 7) TO UNDERHOOD FUSE BLOCK (DIAGRAM 2 OF 7) TRANSFER CASE CONTROL MODULE TRANSMISSION PARK POSITION RELAY UNDERHOOD FUSE BLOCK VIO WIRE VIO/BLK WIRE VIO/GRN WIRE VIO/GRY WIRE VIO/LT GRN WIRE VIO/WHT WIRE VIO/YEL WIRE W/O FRONT COMPARTMENT CONSOLE YEL WIRE

4.3L, 5.3L, 6.2L 6.0L 4.3L/ 5.3L 6 SPEED 8 SPEED 6.0L 4.3L, 5.3L, 6.2L 6.0L 8 SPEED AUTOMATIC TRANSMISSION ASSEMBLY AUTOMATIC TRANSMISSION ASSEMBLY (6 SPEED) BATTERY BATTERY CURRENT SENSOR BATTERY FUSE BLOCK BLK WIRE BLK/GRY WIRE BLK/WHT WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) CHARGING CIRCUIT COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY DK BLU WIRE ECM IGN FUSE ENGINE CONTROL MODULE FUEL PUMP PRIME FUSE FUSE 2 GMLAN SERIAL DATA - 1 GRY WIRE HIGH SPEED GMLAN SERIAL DATA (-) (1) HOT W/ ENGINE CONTROL MODULE WAKEUP RELAY ENERGIZED HOT W/ IGNITION MAIN RELAY ENERGIZED IGN KEY SIG IGNITION SWITCH J126 (4.3L, 5.3L) J125 (6.0L) LOW REF OFF OFF/RUN/ CRANK VOLT RED WIRE RED/GRN WIRE RED/YEL WIRE RUN WIRE RUN/CRANK IGN 1 VOLT SIG GND STARTER ENABLE RELAY CTRL STARTER MOTOR STARTER RELAY STRTR FUSE TRANSMISSION CONTROL MODULE TRANSMISSION INTERNAL MODE SWITCH TRANSMISSION PARK/ NEUTRAL SIG 1 UNDERHOOD FUSE BLOCK VIO/GRN WIRE VIO/LT GRN WIRE WHT WIRE WHT/BLK WIRE WHT/GRY WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE

5 VOLT REF APPLY SIG AUX CTRL AUXILIARY CHASSIS CONTROL MODULE BATT POS VOLT BLK WIRE BLK/BRN WIRE BLU WIRE BLU/RED WIRE BRK CTRL SIG BRK ENABLE SIG BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE ECM IGN FUSE ENABLE SIG GAIN SIG GRN/BLK WIRE GRN/VIO WIRE GROUND HI SPD GMLAN SERIAL DATA HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED ICCM FUSE IGNITION 1 VOLT INSTRUMENT PANEL JUNCTION BLOCK LOW REF POWER DISTRIBUTION SYSTEM PPL/LT GRN WIRE RED/LT GRN WIRE RED/WHT WIRE SERIAL DATA BUS 14 TRAILER BRAKE CONTROL SWITCH TRAILER BRAKE POWER CONTROL MODULE TRLR BRK FUSE UNDERHOOD FUSE BLOCK VIO/LT GRN WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

BATT POS VOLT BCM 1 FUSE BCM 2 FUSE BLK WIRE BLK/GRY WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) BRN/GRY WIRE BRN/LT GRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DRIVER INFORMATION CENTER DISPLAY FRT WASH FUSE FRT WPR FUSE GRY WIRE GRY/GRN WIRE GRY/VIO WIRE HI LO HOT AT ALL TIMES INSTRUMENT CLUSTER INSTRUMENT PANEL JUNCTION BLOCK J124 (EXCEPT 6.6L) J123 (6.6L) LEFT INSTRUMENT PANEL FUSE BLOCK LO WASHER FLUID IND CTRL LOGIC LOW REF MIST MIST HI OFF LO INT INT MTR PARK SW SIG OFF RED WIRE RED/BRN WIRE RED/WHT WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK SERIAL DATA (-) (1) SERIAL DATA 2 TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK VIO WIRE W/ BASE EQUIPMENT W/O BASE EQUIPMENT WASHER RLY CTRL WASHER SW SIG WASHER SWITCH WHT WIRE WHT/BLK WIRE WHT/VIO WIRE WINDSHIELD WASHER FLUID LEVEL SWITCH WINDSHIELD WASHER PUMP WINDSHIELD WASHER PUMP RELAY WINDSHIELD WIPER MOTOR WINDSHIELD WIPER MTR RLY COIL SUPPLY VOLT WINDSHIELD WIPER RELAY WINDSHIELD WIPER SPEED CONTROL RELAY WINDSHIELD WIPER SW HI SIG WIPER SW HI SIG WIPER SW LOW SIG WIPER SWITCH YEL/BLU WIRE YEL/BRN WIRE