GMC Sierra III (2013-2015) (left front lower side of engine block) Wiring diagrams

7 1 2 IGN DATA (-) DATA (+) AUTOMATIC TRANSMISSION ASSEMBLY AUTOMATIC TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR SIGNAL BATT GND BLK WIRE BLK/WHT WIRE BRN/WHT WIRE COMPT, NEAR FAN SHROUD) COMPUTER 5985 2500 2501 2139 2501 2500 DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY DK BLU WIRE DRIVER INFORMATION CENTER (DIC) DISPLAY LOGIC INSTRUMENT CLUSTER ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE GRY/PPL WIRE HOT AT ALL TIMES HOT W/ IGNITION RELAY ENERGIZED IGN IPC FUSE BLOCK FUSE (LOWER LEFT SIDE OF DASH) LOW REFERENCE PARK/NEUTRAL SIG GMLAN DATA BUS (-) GMLAN DATA BUS (+) PC SOLENOID 1 CONTROL PC SOLENOID 2 CONTROL PC SOLENOID 3 CONTROL PC SOLENOID 4 CONTROL PC SOLENOID 5 CONTROL POWER DISTRIBUTION SYSTEM PRESSURE CONTROL (PC) SOLENOID VALVE 1 PRESSURE CONTROL (PC) SOLENOID VALVE 2 PRESSURE CONTROL (PC) SOLENOID VALVE 3 PRESSURE CONTROL (PC) SOLENOID VALVE 4 PRESSURE CONTROL (PC) SOLENOID VALVE 5 RED/GRY WIRE RED/LT GRN WIRE REPLICATED TOS SIGNAL SHIFT SOLENOID (SS) 1 CONTROL SHIFT SOLENOID (SS) 2 CONTROL SHIFT SOLENOID (SS) VALVE 1 SHIFT SOLENOID (SS) VALVE 2 TCM/ECM FUSE TO TRANSMISSION INTERNAL MODE SWITCH (IMS) (DIAGRAM 2 OF 2) TORQUE CONVERTER CLUTCH (TCC) PRESSURE CONTROL (PC) SOLENOID VALVE TORQUE CONVERTER CLUTCH PRESSURE CONTROL SOLENOID CONTROL TOS SIG TOW/ HAUL IND TRANS IGN FUSE 40 TRANSMISSION CONTROL MODULE (TCM) TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VIO/BLK WIRE VIO/YEL WIRE WHT WIRE WHT/GRN WIRE WHT/GRY WIRE

BATTERY BATTERY CURRENT SENSOR (RIGHT REAR OF ENGINE COMPT) BATTERY FUSE BLOCK BLK WIRE BLK/VIO WIRE BLK/WHT WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) BRN WIRE CHARGE IND CHARGE IND CTRL COMPUTER DATA LINES SYSTEM CURRENT SENS LOW REF CURRENT SENS SIG CURRENT SENS DK BLU WIRE DK BLU/VIO WIRE DRIVER INFORMATION CENTER DISPLAY ECM IGN FUSE ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) FUSE FUSE 4 GENERATOR GENERATOR FIELD DUTY CYCLE SIG GRY WIRE GRY/VIO WIRE HI SPD GMLAN SRL DATA (-) (1) HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT CLUSTER LOGIC LT GRN WIRE MDL/ BATT RVC FUSE MOST SERIAL DATA (+) NEAR FAN SHROUD) PPL PPL/LT GRN WIRE RED WIRE RED/YEL WIRE RUN/CRANK IGN 1 VOLT SPLY VOLT UNDERHOOD FUSE BLOCK (ON POSITIVE BATTERY TERMINAL) VIO WIRE VIO/BLK WIRE WHT WIRE WHT/GRN WIRE WHT/YEL WIRE YEL WIRE

BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/WHT WIRE CHMSL FUSE DK BLU WIRE DK GRN WIRE GRN/VIO WIRE GRY/BRN WIRE HEADLIGHTS SYSTEM LT BLU WIRE LT GRN LT BLU WIRE NCA WIRE ORG/ WIRE PNK WIRE PPL PRK LMP LT FUSE PRK LMP RT FUSE REAR BODY JUNCTION BLOCK RED WIRE RED/LT GRN WIRE RIGHT FRONT PARK LAMP RIGHT HEADLAMP ASSEMBLY RIGHT LOWER PARK/TURN SIGNAL LAMP RIGHT MULTI-FUNCTION LED CONTROL MODULE HEADLAMP RIGHT PARK DAYTIME RUNNING LAMP RIGHT PARK/TURN SIGNAL LAMP RIGHT UPPER PARK/TURN SIGNAL LAMP STOP LAMP RELAY TRAILER PARK LAMPS RELAY UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VIO/GRY WIRE VIO/WHT WIRE WHT WIRE YEL WIRE YEL/BLU WIRE

A/C (A/T) COMPRESSOR TRANSFER CASE SHIFT A/C CONTROL COMPRESSOR SWITCH CLUTCH AUTOMATIC TRANSMISSION ASSEMBLY BATTERY BATTERY CURRENT SENSOR BLK WIRE BODY CONTROL MODULE BRAKE FLUID LEVEL SWITCH CHASSIS CONTROL MODULE CONTROL SOLENOID VALVE ASSEMBLY ELECTRONIC BRAKE CONTROL MODULE ENGINE BACK LAMP MULTI-FUNCTION OIL INTAKE AIR LEVEL SWITCH SENSOR SWITCH ENGINE CONTROL MODULE FRONT AXLE ENGAGEMENT ACTUATOR FUEL PUMP FUEL DRIVER COMPOSITION CONTROL SENSOR MODULE IGNITION STOP MAIN LAMP RELAY RELAY INSTRUMENT PANEL JUNCTION BLOCK LEFT CARGO LAMP LEFT LICENSE PLATE LAMP LEFT LOWER TAIL/ STOP, TURN SIGNAL LAMP LEFT REAR LEFT SIDE BACKUP MARKER LAMP LAMP LEFT TAIL LAMP ASSEMBLY LEFT UPPER TAIL/ STOP, TURN SIGNAL LAMP REAR BODY JUNCTION BLOCK REAR DEFOGGER GRID REAR DEFOGGER RELAY RIGHT CARGO LAMP RIGHT LICENSE PLATE LAMP RIGHT LOWER TAIL/ STOP, TURN SIGNAL LAMP RIGHT REAR RIGHT SIDE BACKUP MARKER LAMP LAMP RIGHT TAIL LAMP ASSEMBLY RIGHT UPPER TAIL/ STOP, TURN SIGNAL LAMP TRAILER BRAKE POWER CONTROL MODULE TRAILER CONNECTOR TRANSFER CASE CONTROL MODULE TRANSMISSION CONTROL MODULE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) W/ TWO SPEED ELECTRIC SHIFT CONTROL W/O TWO SPEED ELECTRIC SHIFT CONTROL WHT WIRE WINDSHIELD WASHER STARTER PUMP RELAY RELAY WINDSHIELD WIPER MOTOR WIPER WIPER WINDSHIELD LOW HIGH WIPER SPEED SPEED RELAY DIODE DIODE

10 SERIES EXCEPT 10 SERIES W/ ELECTRONIC DOOR LOCK CONTROL 2 3 16 31 39 24 FUEL LVL SIG LO REF 4.3L 6.0L (VIN G) 6.0L (VIN J) 5 13 9 LOW REF SW SIG SER DATA 58 28 FUEL LVL SIG LO REF 6.6L 4.8L, 5.3L, 6.2L 9 41 OIL LVL SIG LO REF 9 5 4 13 SER DATA LOW REF SW SIG SW SIG ALTERNATIVE FUEL PRESSURE SENSOR (6.0L (VIN B)) BLK WIRE BLK/WHT WIRE BLU/YEL WIRE BRN WIRE CNG CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) COMPUTER DATA LINES COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DRIVER DOOR LATCH ASSEMBLY (W/O BUCKET SEATS, POWER MIRRORS) DRIVER DOOR LOCK/WINDOW SWITCH ENGINE CONTROLS SYSTEM ENGINE OIL LEVEL (EOL) SWITCH (LEFT SIDE OF ENGINE OIL PAN) EXCEPT 4.3L 4.3L EXCEPT HYBRID HYBRID FUEL LVL SIG FUEL PUMP DISABLE CONTROL MODULE (TOP REAR OF CNG REGULATOR MOUNTING BRACKET) GRN/WHT WIRE GRY WIRE GRY/BLK WIRE HI SPD SER DATA BUS (-) HI SPD SER DATA BUS (+) 10 38 HYBRID EXCEPT HYBRID I/P FUSE BLOCK (LEFT SIDE OF DASH, INFORMATION VEHICLE LOCK CONTROL LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE OIL PRESS SIG PASSENGER DOOR LOCK/WINDOW SWITCH PERSONALI- PNK WIRE PPL PPL 44 9 64 27 RED/WHT WIRE RIGHT I/P JUNCTION BLOCK (IN RIGHT END OF DASH) SERIAL DATA SET/ RESET SYSTEM TAN WIRE TAN/ BLK WIRE TAN/BLK WIRE TAN/WHT WIRE TRIP/FUEL W/ DUAL FUEL TANK WIPER/ WASHER SYSTEM YEL WIRE ZATION

AUTOMATIC TRANSMISSION ASSEMBLY BATTERY BATTERY FUSE BLOCK (ENGINE COMPTT TOP FUSE 4 RIGHT) BLK WIRE BLK/WHT WIRE BLOCK DLIS FUSE BLU 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 (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) GRY WIRE HIGH SPEED GMLAN SERIAL DATA (-) (1) HOT W/ IGNITION MAIN RELAY ENERGIZED I/P BEC 2 FUSE IGNITION SWITCH LT GRN WIRE OFF PPL PPL/LT GRN WIRE RED WIRE RED/BLU WIRE RUN WIRE RUN/CRANK IGN 1 VOLT STARTER ENABLE RELAY CTRL STARTER MOTOR STARTER RELAY STRTR FUSE SWITCH TRANSMISSION INTERNAL MODE TRANSMISSION PARK/ NEUTRAL SIGNAL 1 UNDERHOOD FUSE BLOCK (ON POSITIVE BATTERY TERMINAL) VIO/BLK WIRE WHT WIRE WHT/GRY WIRE YEL WIRE YEL/BLK WIRE

BLK WIRE COMPUTER DATA LINES SYSTEM DATA 1 (+) DK BLU WIRE ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) FRONT AXLE ENGAGEMENT ACTUATOR (ON REAR OF TRANSFER CASE) GRY/BLK WIRE HOT W/ IGNITION MAIN RELAY ENERGIZED LOCK IND LOGIC LOW SIG POWER DISTRIBUTION SYSTEM SERIAL TRANS IGN FUSE TRANSFER CASE SHIFT CONTROL SWITCH (ON TOP LEFT OF TRANSFER CASE) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VIO/BLK WIRE WHT WIRE YEL/WHT WIRE

4 HI IND CTRL GMLAN SERIAL DATA 1 (+) GMLAN SERIAL DATA 1 (-) 4 LO IND CTRL RUN/CRANK IGN 1 VOLT 5985 2500 2501 COMPUTER DATA LINES SYSTEM ACCY WAKEUP SERIAL DATA GMLAN SERIAL DATA 1 (+) GMLAN SERIAL DATA 1 (-) ACCY/ RUN CRNK FUSE AWD IND CTRL NEUTRAL IND CTRL 2 HI IND CTRL BLK WIRE BLK/ GRY WIRE BLK/ VIO WIRE BLU/GRY WIRE BRN WIRE BRN/BLK WIRE COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM 1553 1552 1342 550 DK BLU WIRE DK BLU/YEL WIRE FRONT AXLE ENGAGEMENT ACTUATOR (ON REAR OF FUSE FUSE BLOCK (LOWER LEFT SIDE OF DASH) GRY/BLK WIRE GRY/LT GRN WIRE GRY/PPL WIRE GRY/RED WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT CLUSTER INSTRUMENT PANEL JUNCTION BLOCK LOGIC LT GRN/BLK WIRE MTR COUNTER CLOCKWISE CTRL MTR CLOCKWISE CTRL BATT + GND POWER DISTRIBUTION SYSTEM RED/GRY WIRE SERIAL DATA TRANS IGN FUSE TRANSFER CASE SHIFT CONTROL MODULE (LOWER LEFT SIDE OF DASH) TRANSFER CASE) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VIO WIRE VIO/BLK WIRE VIO/LT GRN WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT YEL/ WIRE WHT/GRN WIRE WHT/LT GRN WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE YEL/GRY WIRE YEL/VIO WIRE YEL/WHT WIRE

821 822 6354 TRANSMISSIONS SYSTEM AIR TEMP SENS SIG BANK 1 SENSOR 1 BANK 1 SENSOR 2 BANK 2 SENSOR 1 BANK 2 SENSOR 2 BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/GRY WIRE BLK/LT GRN WIRE BLK/WHT WIRE BLK/YEL WIRE BRN WIRE BRN/LT GRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE DK BLU WIRE DK BLU/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT) FUEL RAIL PRESS SEN SIG FUEL RAIL PRESSURE SENSOR (TOP LEFT REAR OF ENGINE) GRY WIRE GRY/DK BLU WIRE GRY/RED WIRE GRY/WHT WIRE HUMIDITY SENS SIG TAC MTR CTRL KNOCK SENS 1 SIG KNOCK SENS 2 SIG KNOCK SENSOR 1 (LOWER LEFT SIDE OF ENGINE) KNOCK SENSOR 2 (LOWER RIGHT SIDE OF ENGINE) LOW REF LT GRN WIRE LT GRN/DK BLU WIRE LT GRN/WHT WIRE LT GRN/YEL WIRE MANIFOLD ABSOLUTE PRESSURE SENSOR (MAP) (ON TOP OF INTAKE MANIFOLD) MAP SENS SIG 5 VOLT REF MULTIFUNCTION INTAKE AIR SENSOR (RIGHT SIDE OF ENGINE COMPT, IN AIR INTAKE DUCT) NCA WIRE NEAR FAN SHROUD) RED WIRE REVERSE SW SIG SIG GND SPD SENS SIG LOW REF INPUT SIGNAL STARTING/CHARGING SYSTEM TAC CTRL OPN THROTTLE BODY (TOP RIGHT FRONT OF ENGINE) TRANSMISSIONS SYSTEM 179 1174 3212 VIO WIRE VIO/ DK BLU WIRE VIO/DK BLU WIRE VIO/GRY WIRE VIO/LT GRN WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/BRN WIRE WHT/DK BLU WIRE WHT/GRY WIRE WHT/RED WIRE WHT/YEL WIRE YEL WIRE YEL/DK BLU WIRE YEL/WHT WIRE

1 2 3 4 5 6 7 8 FUEL PUMP RLY CTRL 10 11 PNK WIRE 5 VOLT REF 5 VOLT REF ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/WHT WIRE BRAKE PEDAL POSITION (BPP) SENSOR BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DFI VOLT CTRL CYL 4 DFI VOLT CTRL CYL 6 DFI VOLT CTRL CYL 7 DFI VOLT CTRL CYL 8 DK BLU WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT, NEAR FAN SHROUD) ENGINE OIL PRESSURE (EOP) SENSOR (LOWER LEFT REAR OF ENGINE) FUEL INJECTOR 1 (TOP OF RIGHT CYLINDER BANK) FUEL INJECTOR 6 (TOP OF LEFT CYLINDER BANK) FUEL INJECTOR 7 (TOP OF RIGHT CYLINDER BANK) FUEL PRESSURE REGULATOR 1 FUEL PRESSURE REGULATOR 2 GND SOL HIGH SIG GRY WIRE LOW REF LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE MULTI-FUNCTION INTAKE AIR SENSOR NCA WIRE ORG/BLK WIRE PNK WIRE PPL PPL/ WHT WIRE PPL/WHT WIRE SENS VOLT REF 5 VOLT REF TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRANSFER CASE) TURBOCHARGER VANE POSITION CONTROL SOLENOID VALVE (TOP REAR OF ENGINE) TURBOCHARGER VANE POSITION SENSOR (ON LEFT SIDE OF ENGINE) VALVE HIGH CTRL SOL SPLY VOLT VALVE LOW CTRL SOL LOW SIG LOW REF LOW REF VEHICLE SPD SIG W/ TWO SPEED PUSH BUTTON, ELECTRIC SHIFT CONTROL TRANSFER CASE W/O TWO SPEED PUSH BUTTON, ELECTRIC SHIFT CONTROL WHT WIRE WHT/ BLK WIRE YEL WIRE YEL/BLK WIRE