GMC Sierra 3500 HD (2007-2012) 4.3l Wiring diagrams

4.3L 43 44 57 44 28 27 GMLAN BUS + GMLAN BUS - AUX HVAC-IGN FUSE 48 FUSE 45 AXLE SW SIG BLK WIRE BLK/WHT WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE FRONT AXLE ACTUATOR (ON FRONT AXLE ASSEMBLY) GAS DIESEL GROUND DISTRIBUTION SYSTEM 4.8L, 5.3L, 6.6L 4.3L 6.0L, 6.2L GRY/BLK WIRE HOT W/ RUN/CRNK RELAY ENERGIZED IGN GND INSTRUMENT PANEL CLUSTER (IPC) LOGIC PNK WIRE SER DATA TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRANS IGN 1 FUSE 19 FUSE 13 TRANSFER CASE SHIFT CONTROL SWITCH (ON TOP LEFT OF TRANSFER CASE) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT)

2-HI IND 4 HI 4 LO 4 SPEED TRANSMISSION 4-HI IND 4-LO IND 4.3L 5 VOLT INCRMT ENCODER SIG 6 SPEED TRANSMISSION (ALLISON) ACCY WAKEUP SRL DATA AUX HVAC-IGN FUSE 50 AXLE ACTR CTRL AXLE SW SIG GMLAN BUS - GMLAN BUS + IGN VOLT BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (LOWER LEFT SIDE OF DASH) BRN WIRE COMPUTER DATA LINES SYSTEM CTRL DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ENGINE CONTROL MODULE (LEFT FRONT OF ENG COMPT, NEAR FAN SHROUD) FRONT AXLE ACTUATOR (ON FRONT AXLE ASSEMBLY) (TOP LEFT REAR OF ENG) FUSE 30 GMLAN BUS - GMLAN BUS + INCRMT ENCODER SIG GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN ACC AND RUN HOT IN RUN OR START HOT W/ RUN/CRNK RELAY ENERGIZED IGN INSTRUMENT PANEL CLUSTER LAMP LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LOGIC LT BLU WIRE LT GRN/BLK WIRE LT GRN/DK BLU WIRE MISC IGN FUSE 44 MTR CTRL B MTR CTRL A BATT + GND NEUT NEUTRAL IND NEUTRAL IND 2 HI IND CTRL ORG/ WIRE OUTSIDE MOISTURE SENSOR (NEAR INSIDE REAR VIEW MIRROR) PNK WIRE PPL PPL LO REF SW SIG 4 HI IND CTRL 4 LO IND CTRL PPL/WHT WIRE RED/BLK WIRE RIGHT I/P JUNCTION BLOCK (IN RIGHT END OF DASH) SHIFT MOTOR TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRANSFER CASE ENCODER MOTOR (ON TRANSFER CASE) TRANSFER CASE SHIFT CONTROL MODULE (LOWER LEFT SIDE OF DASH) TRANSFER CASE SHIFT CONTROL SWITCH TRANSMISSION CONTROL MODULE (LEFT FRONT OF ENG COMPT, NEAR FAN SHROUD) TREC FUSE 69 UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) W/ OUTSIDE MOISTURE SENSOR W/O OUTSIDE MOISTURE SENSOR WHT WIRE WHT/GRN WIRE WHT/TAN WIRE YEL WIRE

4.3L 43 44 57 44 28 27 GMLAN BUS + GMLAN BUS - AUX HVAC-IGN FUSE 48 FUSE 45 AXLE SW SIG BLK WIRE BLK/WHT WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE FRONT AXLE ACTUATOR (ON FRONT AXLE ASSEMBLY) GAS DIESEL GROUND DISTRIBUTION SYSTEM 4.8L, 5.3L, 6.6L 4.3L 6.0L, 6.2L GRY/BLK WIRE HOT W/ RUN/CRNK RELAY ENERGIZED IGN GND INSTRUMENT PANEL CLUSTER (IPC) LOGIC PNK WIRE SER DATA TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRANS IGN 1 FUSE 19 FUSE 13 TRANSFER CASE SHIFT CONTROL SWITCH (ON TOP LEFT OF TRANSFER CASE) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT)

1 5 B(+) GMLAN L 2501 2500 COMPUTER DATA LINES SYSTEM 3340 5060 COMPUTER DATA LINES SYSTEM 4.3L 6.6L EXCEPT 4.3L, 6.6L 4.3L A/C CMPRSR FUSE 17 (EXCEPT 6.6L) FUSE 16 (6.6L) A/C CMPRSR RELAY A/C IND A/C ON A/C REFRIGERANT PRESSURE SENSOR (NEAR COMPRESSOR, ON A/C HIGH PRESSURE HOSE) BLK WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) GROUND GRY WIRE HOT AT ALL TIMES HVAC BATT FUSE 39 (EXCEPT 6.6L) FUSE 36 (6.6L) HVAC CONTROL MODULE LOGIC MANUAL A/C AUTOMATIC A/C ORG/BLK WIRE RED/WHT WIRE TAN WIRE TAN/BLK WIRE UNDER- HOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT)

19 6 ACCESSORY WAKEUP SERIAL DATA 2 3 LOW SER DATA HI SER DATA 4.3L 5 4 12 13 HI SPD GMLAN (+) HI SPD GMLAN (-) HI SPD GMLAN (-) HI SPD GMLAN (+) 6 SPEED A/T 6.0L (VIN K) W/O TRAILER BRAKE 6.6L EXCEPT 4.3L, 6.6L 8 19 HIGH SPEED GMLAN SERIAL DATA BUS (+) SER DATA COMM ENABLE ACCESSORY WAKEUP SERIAL DATA AUTOMATIC TRANSMISSION BLK WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) CAN DATA BUS HIGH CAN DATA BUS LOW COMM ENABLE COMM ENABLE SERIAL DATA DATA LINK RESISTOR (IN CHASSIS HARNESS, ON LEFT REAR CHASSIS CROSS MEMBER) DK BLU WIRE DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) (ON LEFT SIDE OF FRAME ASSEMBLY) ELECTRONIC COMPASS MODULE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) EXCEPT 6.6L 6.6L EXCEPT GAS 4.3L, 6.0L (VIN K) FUEL PUMP/ TRAILER BRAKE CONTROL MODULE (REAR FRAME, NEAR SPARE TIRE MOUNT) GLOW PLUG CONTROL MODULE (GPCM) (6.6L) (TOP LEFT REAR OF ENGINE) HI SPD GMLAN HI SPD GMLAN SERIAL DATA HIGH SPEED GMLAN SERIAL DATA BUS + LEFT I/P BLOCK JUNCTION (LOWER LEFT SIDE OF DASH) LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LINEAR INTERCONNECT NETWORK BUS LT BLU WIRE LT GRN/BLK WIRE NETWORK BUS SERIAL DATA SERIAL DATA COMM ENABLE TAN TAN/BLK WIRE TAN WIRE TAN/BLK TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TERMINATOR TRANSMISSION CONTROL MODULE VEHICLE COMMUNICATION INTERFACE MODULE (VCIM) (BEHIND CENTER OF DASH) W/ 10 SERIES W/ HYDRAULIC BRAKES W/ ONSTAR W/ PTO W/ TRAILER BRAKE W/ TWO SPEED TRANSFER CASE W/O 10 SERIES W/O INTEGRATED TRAILER BRAKE CONTROL W/O ONSTAR W/O PTO W/O TRAILER BRAKE W/O TWO SPEED TRANSFER CASE YEL WIRE YEL/BLK WIRE

1 3 B+ B+ 16 15 19 HZ SW R TRN HZ SW L TRN HZ SW 24 2 1 5 RLY CTRL SPLY VOLT SPLY VOLT SPLY VOLT 4.3L 4.8L (VIN A) 6.2L (VIN 2) 5.3L (VIN 7) 5.3L (VIN 0) 6.0L (VIN G) 6.6L (VIN L), 6.6L (VIN 8) BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) BRAKE PEDAL POSITION (BPP) SENSOR BRK SPLY SIG BRN WIRE CHEVROLET COMPUTER DATA LINES SYSTEM DATA SERIAL B+ DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DRIVER DOOR LOCK/WINDOW SWITCH DRIVER OUTSIDE REARVIEW MIRROR ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) GMC GROUND DISTRIBUTION SYSTEM GRY WIRE HAZARD SWITCH HEADLAMP, PANEL DIMMER SWITCH AUTO OFF HOT AT ALL TIMES I/P FUSE BLOCK (LEFT SIDE OF DASH, INSTRUMENT PANEL CLUSTER (IPC) LEFT TURN LEFT TURN IND LOW REF BPP SENS SIG LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT STOP TRN FUSE 6 MAJ MIN NCA WIRE ORG/BLK WIRE PARK HEAD PARK LP SIG PASSENGER DOOR LOCK/WINDOW SWITCH PASSENGER OUTSIDE REARVIEW MIRROR RED/WHT WIRE RF TRN SIG RIGHT FRONT SIDE MARKER LAMP RIGHT LOWER PARK/ TURN SIGNAL LAMP RIGHT TURN RIGHT TURN IND LOGIC RIGHT UPPER PARK/ TURN SIGNAL LAMP RT STOP TRN FUSE 8 SPLY VOLT TAN WIRE TURN SIGNAL/ MULTI-FUNCTION SWITCH (ON LEFT SIDE OF STEERING COLUMN) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) W/ POWER FOLDING W/ MANUAL FOLDING W/ POWER MIRRORS W/O POWER MIRRORS WHT WIRE WHT/ DK BLU WIRE YEL WIRE

4.3L 6 SPEED A/T ALLISON TRANSMISSION 6 SPEED A/T AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION AUXILIARY FLUID PUMP CONTROL MODULE BARE BARE BARE BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE BODY CONTROL MODULE (BCM) DIESEL ENGINE CONTROL MODULE ENGINE CONTROL MODULE (ECM) ENGINE COOLANT LEVEL SWITCH EXCEPT 4.3L 4.3L EXCEPT DIESEL EXCEPT HYBRID EXHAUST GAS RECIRCULATION (EGR) VALVE SHIELD FAN HIGH RELAY RIGHT ENGINE COOLING FAN RESISTOR FROM FROM FRONT DOME/ READING LAMPS FUEL PRESSURE REGULATOR 1 SHIELD FUEL PRESSURE REGULATOR 2 SHIELD FUEL PRESSURE REGULATOR 2 SHIELD FUEL PRESSURE REGULATOR 1 SHIELD FUSE FUSE GLOW PLUG CONTROL MODULE (GPCM) GLOW PLUG FUEL FILTER CONTROL PRESSURE MODULE SWITCH (GPCM) GRY WIRE HYBRID PROPULSION IGNITION CONTROL MODULE (ICM) INTAKE AIR VALVE SHIELD EXHAUST GAS RECIRCULATION COOLER BYPASS SOLENOID VALVE MASS AIR FLOW (MAF)/ INTAKE AIR TEMPERATURE (IAT) SENSORS MOBILE RADIO FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) NCA WIRE PARK/ NEUTRAL POSITION SWITCH RELAY RELAY RIGHT ENGINE COOLING FAN ROOF ROOF BEACON BEACON RELAY SWITCH SHIELD BARE BARE SPEED A/T TO RIGHT FROM BATTERY (DIAGRAM (DIAGRAM 1 OF 6) 1 OF 6) TRANSMISSION CONTROL MODULE (TCM) W/ HYBRID PROPULSION W/ ROOF MOUNTED LAMP W/ WRECKER EMERGENCY LAMP, BODY BUILDER EMERGENCY LAMP, ROOF MOUNTED LAMP WATER IN-FUEL SENSOR WHT WIRE

4.3L BACKUP ALARM BLK WIRE CHEVROLET CHIME MODULE DIESEL DIESEL, W/ 31 SERIES, W/O REAR AUXILIARY FUEL TANK DIGITAL VIDEO DISC (DVD) CONTROL MODULE DRIVER HEATED SEAT SWITCH ELECTRONIC BRAKE CONTROL MODULE (EBCM) EXCEPT 4.3L, 6.0L (VING) FROM PARK ENABLE PCB RELAY LEFT I/P JUNCTION BLOCK (DIAGRAM 3 OF 6) FRONT FUEL PUMP, SENDER ASSEMBLY FUEL PUMP FUEL PUMP/ FUEL PUMP TRAILER BRAKE FLOW CONTROL CONTROL MODULE MODULE GAS GMC GRD HEATED SEAT CONTROL MODULE HEATED SEAT SWITCH INFRARED TRANSMITTER LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LOWER RIGHT TAIL/ STOP, TURN SIGNAL LAMP NCA WIRE PASSENGER RADIO REAR FUEL PUMP, SENDER ASSEMBLY REAR LAMPS JUNCTION BLOCK (INSIDE OF LEFT REAR FRAME RAIL) RIGHT BACKUP LAMP RIGHT RIGHT REAR BACKUP SIDE MARKER LAMP LAMP SECONDARY FUEL PUMP RELAY TRAILER CONNECTOR UPPER RIGHT TAIL/ STOP, TURN SIGNAL LAMP VIDEO DISPLAY W/ ACTIVE BRAKE, W/O 10 SERIES W/ CAMPER, W/ CAMPER, W/O CAMPER, TRAILER, BACKUP TRAILER, BACKUP ALARM ALARM W/ DUAL FRONT DOOR MOUNTED, 4 SPEAKER SYSTEM W/ LUXURY EDITION W/O LUXURY EDITION, W/ REAR SEAT ENTERTAINMENT PACKAGE W/ LUXURY EDITION, REAR SEAT ENTERTAINMENT PACKAGE W/ PERFORMANCE ENHANCED AUDIO W/ REAR AUXILIARY FUEL TANK W/ SPO DVD W/ SPO HEATED SEATS W/O CAMPER, W/O LUXURY EDITION W/O PERFORMANCE ENHANCED AUDIO W/O RADIO W/O REAR AUXILIARY 6.0L (VIN G) FUEL TANK W/O REAR AUXILIARY FUEL TANK 6.0L (VIN G) W/O REAR SEAT RADIO, LUXURY EDITION W/O W/ INTEGRATED INTEGRATED TRAILER TRAILER BRAKE BRAKE WHT WIRE

16 31 39 24 FUEL LVL SIG LO REF 4.3L 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 BLK WIRE BLK/WHT WIRE BRN WIRE 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 OIL LEVEL (EOL) SWITCH (LEFT SIDE OF ENGINE OIL PAN) EXCEPT HYBRID HYBRID FUEL LVL SIG GRY WIRE GRY/BLK WIRE HYBRID EXCEPT HYBRID I/P FUSE BLOCK (LEFT SIDE OF DASH, INFORMATION VEHICLE 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 37 RIGHT I/P JUNCTION BLOCK (IN RIGHT END OF DASH) SERIAL DATA SET/ RESET SYSTEM TAN/ BLK WIRE TAN/BLK WIRE TAN/WHT WIRE TRIP/FUEL W/ 10 SERIES W/ DUAL FUEL TANK W/ ELECTRONIC DOOR LOCK CONTROL W/ POWER WINDOWS W/O 10 SERIES YEL WIRE ZATION

28 27 39 2500 2501 1786 GMLAN HI-SPD (+) GMLAN HI-SPD (-) IMS GROUND 28 27 43 29 GMLAN HI-SPD (+) GMLAN HI-SPD (-) 28 27 43 44 GMLAN HI-SPD (+) GMLAN HI-SPD (-) 4.3L 6 SPEED A/T 6.0L (VIN G) 6.0L (VIN J) HYBRID 66 46 2500 2501 GMLAN HI-SPD (+) GMLAN HI-SPD (-) 8 9 GMLAN HI-SPD (+) GMLAN HI-SPD (-) AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION INTERNAL MODE SWITCH AUTOMATIC TRANSMISSION INTERNAL MODE SWITCH (IMS) AUTOMATIC TRANSMISSION INTERNAL MODE SWITCH (IMS) P/N SWITCH AUTOMATIC TRANSMISSION SHIFT LOCK CONTROL SOLENOID BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) BRK SW SIG COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) EXCEPT 4.3L EXCEPT 6.0L (VIN G) GROUND GRY WIRE HOT AT ALL TIMES LT BLU/WHT WIRE MISC IGN FUSE 43 (EXCEPT 6.6L) FUSE 40 (6.6L) ORG/BLK WIRE P/N SIGNAL P/N SWITCH PARK/NEUTRAL POSITION (PNP) SWITCH (ON LEFT REAR SIDE OF TRANSMISSION) PNK PNK PNK PNK WIRE PNK PNK PNK POWER DISTRIBUTION SYSTEM WIRE PNK WIRE RUN/CRANK RELAY RUN/CRANK RELAY CTRL SHIFT LOCK SOL SUPPLY VOLT STOP LAMP SWITCH TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRANSMISSION CONTROL MODULE TRANSMISSION CONTROL MODULE (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) TRANSMISSION CONTROL SOLENOID VALVE ASSEMBLY CONTROL MODULE (TCM) TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE YEL WIRE