GMC Sierra III (2013-2015) blk Wiring diagrams

A/T MANUAL SHIFT SWITCH AUTOMATIC TRANSMISSION ASSEMBLY BLK WIRE BLK/WHT WIRE BLU/GRY WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM DK BLU WIRE FROM AUTOMATIC TRANSMISSION ASSEMBLY (DIAGRAM 1 OF 2) FTP SWITCH 1 VOLTAGE FTP SWITCH 3 VOLTAGE FTP SWITCH 4 VOLTAGE FTP SWITCH 5 VOLTAGE GMLAN GMLAN GMLAN SERIAL SERIAL GMLAN SERIAL SERIAL DATA DATA DATA DATA BUS - BUS + BUS + BUS - GRN WIRE GRY WIRE INPUT SPEED SENSOR (ISS) SIGNAL ISS/OSS SUPPLY VOLTAGE NCA WIRE OUTPUT SPEED SENSOR (OSS) SIGNAL PPL/YEL WIRE RED WIRE REF SENSOR TOW/ HAUL MODE SWITCH TOW/ HAUL SW SIG TRANSMISSION CONTROL MODULE (TCM) CONTROL SOLENOID VALVE ASSEMBLY TRANSMISSION FLUID PRESSURE (TFP) SWITCH TRANSMISSION INPUT SHAFT SPEED (ISS) TRANSMISSION INTERNAL MODE SWITCH (IMS) TRANSMISSION OUTPUT SHAFT SPEED (ISS) TRANSMISSION RANGE SWITCH SIG A TRANSMISSION RANGE SWITCH SIG B TRANSMISSION RANGE SWITCH SIG C TRANSMISSION RANGE SWITCH SIG P TRANSMISSION SHIFT LEVER WHT WIRE YEL WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 AIR TMP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 B(+) A/C ON AIR TEMP RF SUNLD AMB AIR TMP GMLAN L AMBIENT AIR TEMPERATURE SENSOR (ON LEFT SIDE OF RADIATOR SUPPORT) AMBIENT LIGHT/SUNLOAD SENSOR ASSEMBLY (TOP CENTER OF DASH) AUTO BATT POS VOLT BLK WIRE BLK/WHT WIRE BREAKOUT) BRN WIRE COLNT LVL GROUND LOW REF COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE ENGINE COOLANT LEVEL SWITCH (6.6L) (ON BOTTOM OF SURGE TANK) EVAPORATOR TEMPERATURE SENSOR (ON HVAC ASSEMBLY) FAN DN FAN UP FRESH AIR FRNT DFG FRT DEF A/C IND FSH AIR GROUND GROUND DISTRIBUTION SYSTEM GROUND IGN 3 REAR DEFOG GRY WIRE GRY/BLK WIRE HVAC CONTROL MODULE INSTRUMENT PANEL CLUSTER (IPC) DRIVER INFORMATION CENTER (DIC) DISPLAY LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LEFT SUNLOAD SENSOR LEFT TEMP CONTROL LF SUNLD L AIR TMP R AIR TMP LOGIC LOW REF LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MODE DN MODE UP MTR SPD CTRL OFF ORG/ WIRE POWER DISTRIBUTION SYSTEM DEFOGGER SYSTEM PPL PPL/WHT WIRE R AIR TMP AIR TMP R AIR TMP TEMP SENS MODE CTRL L AIR TMP RECIR CTRL R AIR TMP REAR DFG RECIR RECIRC RED WIRE RED/WHT WIRE RER DEF RIGHT I/P JUNCTION BLOCK (IN RIGHT END OF DASH) RIGHT SUNLOAD SENSOR RIGHT TEMP CONTROL SERIAL DATA TAN WIRE UPPER LEFT AIR TEMPERATURE SENSOR (UNDER UPPER LEFT SIDE OF DASH) UPPER RIGHT AIR TEMPERATURE SENSOR (UNDER UPPER RIGHT SIDE OF DASH) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

19 14 69 71 RLY SPD SIG 2501 2500 COMPUTER DATA LINES 40 24 30 46 LOW REF ECT SENS SIG 6.0L 6.6L A/C CMPRSR FUSE 17 (EXCEPT 6.6L) FUSE 16 (6.6L) A/C CMPRSR RELAY A/C COMPRESSOR CLUTCH (ON FRONT BLK WIRE BRN WIRE BRN/WHT WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE COOLING FAN (6.6L) (FRONT CENTER OF ENGINE COMPT) EXCEPT 6.6L 6.6L FROM PWR/TRN RELAY (DIAGRAM 3 OF 3) FUSE HOLDER GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HVAC BLWR FUSE 70 HVAC IGN FUSE 55 (EXCEPT 6.6L) FUSE 52 (6.6L) LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE OF A/C COMPRESSOR) ORG/BLK WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL PPL/WHT WIRE RED WIRE RED/BLK WIRE RED/WHT WIRE RIGHT I/P JUNCTION BLOCK (IN RIGHT END OF DASH) RLY CTRL RUN/ CRNK RELAY SENS SIG PWRTRN RLY CTRL FAN RLY CTRL FAN RLY CTRL SPD SIG LOW REF SYSTEM 459 5514 TAN WIRE TAN/BLK WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

BLK WIRE BRN WIRE COMPRSR RELAY (DIAGRAM 2 OF 3) COOLING FAN DIODE 1 COOLING FAN DIODE 2 DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE EXCEPT 6.0L FAN CNTRL RELAY FAN FUSE 68 FAN HI RELAY FAN LO RELAY FAN RELAY FAN-1 FUSE 60 FAN-2 FUSE 62 GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES LEFT AIR TEMPERATURE ACTUATOR (BOTTOM LEFT OF HVAC MODULE) LOGIC LEFT COOLING FAN (EXCEPT 6.0L) (LEFT FRONT OF ENGINE COMPT) LOGIC LOGIC B+ GND LOWER LEFT AIR TEMPERATURE SENSOR (LEFT SIDE OF HVAC MODULE) LOWER RIGHT AIR TEMPERATURE SENSOR (LOWER LEFT OF HVAC MODULE) LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE MODE ACTUATOR (LEFT END OF HVAC MODULE) ORG/BLK WIRE PPL PWR/ TRN RELAY RECIRCULATION ACTUATOR (TOP RIGHT SIDE OF HVAC MODULE) RIGHT AIR TEMPERATURE ACTUATOR (TOP MIDDLE OF HVAC MODULE) LOGIC RIGHT COOLING FAN (RIGHT FRONT OF ENGINE COMPT) TAN WIRE TO A/C UNDER- HOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL 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

2-HI IND 4-HI IND 4-LO IND BLK WIRE BLK/LT GRN WIRE BLU/GRY WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) BRN WIRE BRN/BLK WIRE COMPUTER DATA LINES SYSTEM DATA 1 (+) DK BLU WIRE DK BLU/YEL WIRE ENGINE BLOCK) ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) GRY/LT GRN WIRE GRY/RED WIRE IGN 3 ILL INSTRUMENT PANEL JUNCTION BLOCK LOW REF LT GRN/BLK WIRE NEUTRAL IND RED/GRY WIRE SERIAL SERIAL DATA (-) (1) SNSR SIG TRANSFER CASE MOTOR (ON TRANSFER CASE) TRANSFER CASE SHIFT CONTROL SWITCH (ON TOP LEFT OF TRANSFER CASE) TRANSMISSION OUTPUT SHAFT SPEED SENSOR (IN TRANSMISSION) VEH SPD VEH SPD SNSR VIO WIRE VIO/BRN WIRE VIO/LT GRN WIRE VIO/WHT WIRE WHT WIRE WHT/LT GRN WIRE YEL WIRE YEL/BRN WIRE YEL/GRY WIRE YEL/VIO WIRE

18 20 GMLAN SER DATA (+) GMLAN SER DATA (-) BCM 3 FUSE BLK WIRE BLK/ORG WIRE BRAKE FLUID LEVEL SWITCH (ON BRAKE MASTER CYLINDER RESERVOIR) BRAKE IND BREAKOUT) BRK FLUID LVL COMPUTER DATA LINES SYSTEM DISPLAY DK BLU WIRE DK BLU/YEL WIRE DLIS FUSE DRIVER SEAT BELT SWITCH DRIVER SEAT BELT BUCKLE DRIVER SEAT POSITION SENSOR ELECTRONIC BRAKE CONTROL MODULE (ON LEFT SIDE OF FRAME ASSEMBLY) HI SPD GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGNITION SWITCH INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (UNDER DRIVER'S SEAT) INSTRUMENT CLUSTER INSTRUMENT PANEL JUNCTION BLOCK IPC IGN/SDM IGN FUSE KEY-IN IGNITION SWITCH LEFT INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT LO SPD GMLAN SERIAL DATA LOGIC LOW TIRE PRESSURE IND LT GRN WIRE LT GRN/GRY WIRE NCA WIRE OFF ORG/BLU WIRE ORG/BRN WIRE ORG/GRN WIRE ORG/VIO WIRE PASS SEAT BELT IND PASSENGER AIR BAG DISABLE INDICATOR PASSENGER SEAT BELT SWITCH PASSENGER SEAT BELT BUCKLE PASSENGER SEAT POSITION SENSOR RED/BLU WIRE RED/GRY WIRE RUN WIRE RUN/CRANK SEAT BELT IND SEAT BELT ON IND SIDE OF DASH) VIO/BLK WIRE VIO/WHT WIRE WHT WIRE WHT/VIO WIRE

1 2 MOST SER DATA (-) MOST SER DATA (+) 14 25 RF DR AJAR SW SIG LF DR AJAR SW SIG 24 25 GMLAN SERIAL DATA (-) GMLAN SERIAL DATA (+) 2500 2501 COMPUTER DATA LINES SYSTEM AJAR SW SIG BATT POS VOLT BLK WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/VIO WIRE DRIVER DOOR LATCH ASSEMBLY (IN REAR OF DRIVER FRONT DOOR) DRIVER WINDOW MOTOR (INSIDE DRIVER'S DOOR) GRN/YEL WIRE GRY WIRE GRY/VIO WIRE HEAD PARK AUTO OFF HEADLAMP SWITCH INSTRUMENT PANEL JUNCTION BLOCK LEFT REAR DOOR LATCH ASSEMBLY (CREW CAB: REAR OF LEFT REAR DOOR) LEFT REAR WINDOW SWITCH LF DOOR AJAR SW SIG LIN BUS 3 LIN BUS 4 LOGIC LR DR LR DR AJAR SW SIG LT GRN/BRN WIRE LT GRN/GRY WIRE OFF/RUN/CRANK VOLT PARK BRAKE SW SIG PARK BRAKE SWITCH (ON PARK BRAKE PEDAL ASSEMBLY) PASSENGER DOOR LATCH ASSEMBLY (IN REAR OF PASSENGER FRONT DOOR) PASSENGER WINDOW SWITCH RADIO RED/GRY WIRE RF DR RIGHT REAR DOOR LATCH ASSEMBLY (CREW CAB: REAR OF RIGHT REAR DOOR) RIGHT REAR WINDOW SWITCH RR DR AJAR SW SIG W/ POWER OPERATED WINDOW W/O POWER OPERATED WINDOW WHT WIRE WHT/GRN WIRE WHT/VIO WIRE

15 7 WASHER RLY CTRL MTR PARK SW SIG 24 9 8 5 PNK WASHER SW SIG WIPER SW LO SIG LOW REF WIPER SW HI SIG WIRE BAT POS VOLT BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM DK GRN WIRE DRIVER INFORMATION CENTER (DIC) DISPLAY FRONT WASHER DIODE FRT WASH FUSE 7 (EXCEPT 6.6L) FRT WASH PCB RELAY FUSE 5 (6.6L) FUSE HOLDER (EXCEPT 6.6L: ON POSITIVE BATTERY GROUND DISTRIBUTION SYSTEM LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) GRY WIRE HI LO OFF INT HOT AT ALL TIMES I/P FUSE BLOCK (LEFT SIDE OF DASH, INSTRUMENT PANEL CLUSTER (IPC) LOGIC LOW WASHER FLUID IND SERIAL CTRL DATA LT BLU WIRE LT GRN WIRE MIST HI LO MIST OFF INT WIPER SWITCH ORG/ WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL RED/BLK WIRE RED/WHT WIRE RT STOP TRN FUSE 8 SERIAL DATA TAN WIRE TAN/BLK WIRE TERMINAL) (6.6L: RIGHT SIDE OF FIREWALL) TURN SIGNAL/ MULTI-FUNCTION SWITCH (ON LEFT SIDE OF STEERING COLUMN) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WASHER SWITCH WINDSHIELD WASHER FLUID LEVEL SWITCH (BOTTOM OF WASHER FLUID RESERVOIR) WINDSHIELD WASHER FLUID PUMP (BOTTOM OF WASHER FLUID RESERVOIR) WINDSHIELD WIPER MOTOR (UNDER LEFT SIDE OF WINDSHIELD COWL) WINSHIELD WIPER SW HI SIG WIPER CONTROL PCB RELAY WIPER HIGH SPEED DIODE WIPER LOW SPEED DIODE WIPER SPEED PCB RELAY FRT WPR FUSE 36 (EXCEPT 6.6L) WPR FUSE 33 (6.6L) WNDSHLD WIPER SW SIG 2 YEL WIRE