GMC Sierra III facelift (2015-2018) base equipment except base equipment Wiring diagrams

ASSIST STEP CONTROL MODULE BASE EQUIPMENT EXCEPT BASE EQUIPMENT BLU/YEL WIRE DK BLU WIRE DK BLU/YEL WIRE GRN WIRE HI SPD SER DATA (-) 1 HI SPD SER DATA (-) 1 ACC WAKEUP DATA HI SPD SER DATA (-) 2 INSTRUMENT PANEL JUNCTION BLOCK LO SPD DATA LO SPD SER DATA LT GRN WIRE PARKING ASSIST CONTROL MODULE PASSENGER PRESENCE MODULE (IF EQUIPPED) STEERING WHEEL ANGLE SENSOR TRANSFER CASE CONTROL MODULE VIO/YEL WIRE W/ POWER RETRACTABLE RUNNING BOARD STEPS WHT WIRE WHT/DK BLU WIRE

BASE EQUIPMENT EXCEPT BASE EQUIPMENT BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE COLLISION ALERT INDICATORS DATA LINK CONNECTOR DRIVER SEAT HEATING, COOLING SWITCH EXCEPT BASE EQUIPMENT FORWARD ADJUSTABLE PEDAL RELAY HEADLAMP SWITCH HVAC CONTROL MODULE IGNITION MAIN RELAY INSTRUMENT CLUSTER INSTRUMENT PANEL JUNCTION BLOCK INSTRUMENT PANEL MULTI- FUNCTION SWITCH NCA WIRE PASSENGER SEAT HEATING, COOLING SWITCH REARWARD ADJUSTABLE PEDAL RELAY RETAINED ACCESSORY POWER RELAY 1 STEERING WHEEL ANGLE SENSOR TOW/HAUL MODE SWITCH TRANSMISSION MANUAL SHIFT SWITCH TRANSMISSION SHIFT LOCK CONTROL SOLENOID ACTUATOR TURN SIGNAL/ MULTI-FUNCTION SWITCH WHT WIRE WINDSHIELD WIPER MOTOR

ACCESSORY DC/AC POWER INVERTER MODULE BASE EQUIPMENT EXCEPT BASE EQUIPMENT BLK WIRE BLOWER MOTOR CARGO LAMP RELAY CENTER CONSOLE COMPARTMENT ACCESSORY POWER RECEPTACLE CENTER CONSOLE COMPARTMENT LAMP CENTER CONSOLE REAR ACCESSORY POWER RECEPTACLE CENTER HIGH MOUNTED STOP LAMP CHILD SECURITY LOCK DISABLE RELAY DATA LINK CONNECTOR DOME LAMP SWITCH DOOR DEAD LOCK RELAY ELECTRICAL AUXILIARY HEATER FIVE LAMP, ROOF MARKER FRONT MIDDLE ROOF CLEARANCE LAMP FRONT OVERHEAD CONSOLE LEFT DOME/ READING LAMPS GARAGE DOOR OPENER HORN SWITCH INSIDE REAR VIEW MIRROR INSTRUMENT PANEL 1 ACCESSORY POWER RECEPTACLE INSTRUMENT PANEL 2 ACCESSORY POWER RECEPTACLE INSTRUMENT PANEL ACCESSORY POWER RECEPTACLE INSTRUMENT PANEL JUNCTION BLOCK LEFT FRONT OUTER ROOF CLEARANCE LAMP LEFT STEERING WHEEL CONTROLS SWITCH LEFT SUNSHADE MOBILE DEVICE WIRELESS CHARGER MODULE NCA WIRE OVERHEAD CONSOLE ACCENT LAMP PASSENGER AIR BAG DISABLED INDICATOR RADIO PRESETS STEERING WHEEL CONTROLS SWITCH RADIO VOLUME STEERING WHEEL CONTROLS SWITCH RED WIRE RETAINED ACCESSORY POWER RELAY 2 RIGHT FRONT OUTER ROOF CLEARANCE LAMP RIGHT FRONT OVERHEAD CONSOLE DOME/ READING LAMPS RIGHT STEERING WHEEL CONTROLS SWITCH RIGHT SUNSHADE ROOF BEACON PROVISION (BLUNT CUT) ROOF BEACON RELAY ROOF BEACON SWITCH SLIDING REAR WINDOW CLOSE RELAY SLIDING REAR WINDOW OPEN RELAY SLIDING REAR WINDOW SWITCH STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATER STEERING WHEEL HEATING CONTROL MODULE SUNROOF MOTOR SUNROOF SWITCH TRANSFER CASE SHIFT CONTROL SWITCH W/ HEATER STEERING WHEEL W/ ROOF MOUNTED PROVISIONS LAMP W/ SUN ROOF GLASS SLIDING WINDSHIELD FRONT VIEW CAMERA YEL WIRE

2 HI 4 HI 4 LO ASSIST IND AUTO AUX 1 AUX 2- AUX 3 AUX 4 BASE EQUIPMENT EXCEPT BASE EQUIPMENT BLK WIRE BRAKE IND BRN/BLK WIRE BRN/WHT WIRE COLLISION ALERT IND COMPUTER DATA COMPUTER DATA LINES SYSTEM DRIVER SEAT HEATING, COOLING SWITCH GRN/BLK WIRE GRN/BRN WIRE GRN/WHT WIRE GROUND DISTRIBUTION SYSTEM GRY/GRN WIRE INFO DISPLAY MODULE INSTRUMENT PANEL JUNCTION BLOCK INSTRUMENT PANEL MULTI- FUNCTION SWITCH LANE DEPARTURE LDW/FCA IND CTRL LINES SYSTEM LOGIC LT GRN WIRE LT GRN/GRY WIRE LT GRN/WHT WIRE PARKING PASSENGER SEAT HEATING, COOLING SWITCH RIGHT REAR WINDOW SWITCH TRAILER IND TRANSFER CASE CONTROL MODULE TRANSFER CASE SHIFT CONTROL SWITCH VIO/WHT WIRE WARNING/FORWARD WHT WIRE WINDSHIELD FRONT VIEW CAMERA YEL WIRE

AUX AUDIO COMM SIG AUX AUDIO SCREEN (2) AUX DETECTION SIG AUXILIARY AUDIO INPUT BASE EQUIPMENT EXCEPT BASE EQUIPMENT BATT POSITIVE VOLT BK AM/FM ANT SIG BLK WIRE BLK/YEL WIRE BLU WIRE COAX COMPUTER DATA LINES SYSTEM CU XM/HD DISTRIBUTION GMLAN SERIAL DATA GRN WIRE GROUND GRY WIRE GRY/GRN WIRE GRY/VIO WIRE HOT AT ALL TIMES IPC FUSE LEFT INSTRUMENT PANEL FUSE BLOCK LH AUX AUDIO SIG (2) LOGIC LOW REF LT BLU WIRE LT GRN WIRE LT GRN/DK BLU WIRE MEDIA DISC PLAYER MOST CONTROL MOST SERIAL DATA (+) NCA WIRE NETWORK BUS 10 POSITIVE VOLTAGE RADIO RADIO ANTENNA RDO FUSE RED/GRY WIRE RED/VIO WIRE RED/YEL WIRE RH AUX AUDIO SIG (2) RIGHT INSTRUMENT PANEL FUSE BLOCK SERIAL DATA STEERING WHEEL AIR BAG COIL STR WHL CNTRL FUSE SYSTEM TELEPHONE VOICE SIG USB USB/OBS DET FUSE VIO WIRE W/ FRONT COMPARTMENT FLOOR CUSTOM CONSOLE W/ REAR SEAT ENTERTAINMENT W/O REAR SEAT ENTERTAINMENT WHT/LT GRN WIRE WHT/VIO WIRE YEL 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

AUX AUDIO COMM SIG AUX AUDIO SCREEN (2) AUX DETECTION SIG AUXILIARY AUDIO INPUT BASE EQUIPMENT EXCEPT BASE EQUIPMENT BATT POSITIVE VOLT BK AM/FM ANT SIG BLK WIRE BLK/YEL WIRE BLU WIRE COAX COMPUTER DATA LINES SYSTEM CU XM/HD DISTRIBUTION GMLAN SERIAL DATA GRN WIRE GROUND GRY WIRE GRY/GRN WIRE GRY/VIO WIRE HOT AT ALL TIMES IPC FUSE LEFT INSTRUMENT PANEL FUSE BLOCK LH AUX AUDIO SIG (2) LOGIC LOW REF LT BLU WIRE LT GRN WIRE LT GRN/DK BLU WIRE MEDIA DISC PLAYER MOST CONTROL MOST SERIAL DATA (+) NCA WIRE NETWORK BUS 10 POSITIVE VOLTAGE RADIO RADIO ANTENNA RDO FUSE RED/GRY WIRE RED/VIO WIRE RED/YEL WIRE RH AUX AUDIO SIG (2) RIGHT INSTRUMENT PANEL FUSE BLOCK SERIAL DATA STEERING WHEEL AIR BAG COIL STR WHL CNTRL FUSE SYSTEM TELEPHONE VOICE SIG USB USB/OBS DET FUSE VIO WIRE W/ FRONT COMPARTMENT FLOOR CUSTOM CONSOLE W/ REAR SEAT ENTERTAINMENT W/O REAR SEAT ENTERTAINMENT WHT/LT GRN WIRE WHT/VIO WIRE YEL WIRE

5 VOLT REF 6.2L BASE EQUIPMENT EXCEPT BASE EQUIPMENT BCM 6 FUSE BLK WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/WHT WIRE BLU WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM DATA BUS 1 DK BLU WIRE DLIS FUSE GMLAN SERIAL GRY/RED WIRE HI SPEED HI SPEED GMLAN SERIAL DATA (-) 1 HOT AT ALL TIMES IGNITION SWITCH INSTRUMENT PANEL JUNCTION BLOCK KEY-IN SWITCH LEFT INSTRUMENT PANEL FUSE BLOCK LOW REF OFF OFF RUN/CRANK VOLT PPL/BLK WIRE RED/BLU WIRE RED/DK BLU WIRE RED/WHT WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK RUN WIRE SENS LOW REF SERIAL DATA BUS (-) IMS MODE SW RETURN SERIAL DATA BUS- SHIFT INTERLOCK SOL CTRL STOP LAMP SW SIG TRANSMISSION CONTROL MODULE TRANSMISSION FLUID PRESSURE SWITCH TRANSMISSION INTERNAL MODE SWITCH AUTOMATIC TRANSMISSION ASSEMBLY TRANSMISSION SHIFT LOCK CONTROL SOLENOID ACTUATOR WHT WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/VIO WIRE YEL/WHT WIRE