GMC Sierra 3500 HD (2007-2012) computer data lines system Wiring diagrams

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

1 2 3 4 9 10 BATTERY (+) BATTERY (+) BATTERY (+) BATTERY (+) GROUND BATTERY (+) 14 15 RIGHT REAR DOOR AJAR SW LEFT REAR DOOR AJAR SW 5 11 7 9 LOW REF LF OPEN SIG LF AJAR SIG LO-SPD DATA 9 5 13 LO SPD DATA LOW REF RF AJAR SIG BCM FUSE BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (ON LOWER LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM CREW CAB ONLY CTSY FUSE DIM FUSE DK GRN WIRE DOOR LATCH ASSEMBLY (LEFT REAR) DOOR LATCH ASSEMBLY (PASSENGER) DOOR LATCH ASSEMBLY (RIGHT REAR) DOOR LATCH ASSEMBLY- DRIVER DRIVER DOOR SWITCH (DDS) FUSE BLOCK (I/P) (LEFT SIDE OF DASH) GRY/BLK WIRE HEAD HEADLAMP, PANEL DIMMER SWITCH HOT AT ALL TIMES IS LPS FUSE JUNCTION BLOCK (LEFT I/P) JUNCTION BLOCK (RIGHT I/P) LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE LT STOP TRN FUSE PARK AUTO OFF PARK BRAKE SW SIGNAL PASSENGER DOOR SWITCH (PDS) PNK IG III WIRE PNK WIRE RED/WHT WIRE RT STOP TRN FUSE STOP LAMPS FUSE TAN WIRE TAN/BLK WIRE TAN/WHT WIRE WHT WIRE YEL WIRE

1 8 13 B+ LOW REF LO SPD DATA BLK WIRE BLK/WHT WIRE BLU WIRE CHIME MODULE (EXCEPT W/RADIO) (CENTER OF DASH) COMPUTER DATA LINES SYSTEM DIESEL DK GRN WIRE DLIS FUSE 36 FUSE 34 DRIVER SEAT BELT SW SIG DRIVER'S INFO CENTER DRIVER'S SEAT BELT WARNING LED EXCEPT W/RADIO GAS DIESEL GMLAN LO-SPD SERIAL DATA GRY WIRE HOT AT ALL TIMES IGNITION SWITCH INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (UNDER DRIVER'S SEAT) INSTRUMENT PANEL CLUSTER IPC FUSE 48 FUSE 46 JUNCTION BLOCK (LEFT I/P) (LOWER LEFT SIDE OF DASH) KEY-IN IGNITION SWITCH LOGIC LT BLU WIRE NCA WIRE PARK BRAKE SWITCH (ON PARK BRAKE PEDAL ASSEMBLY) PARK/NEUTRAL POSITION SWITCH (ON LEFT REAR SIDE OF TRANSMISSION) PNK LOW REF WIRE PNK PNK SUPPLEMENTAL RESTRAINTS SYSTEM WIRE PNK WIRE RADIO (W/RADIO) (CENTER OF DASH) RANGE SW - C RANGE SW A RANGE SW B RANGE SW P RDO FUSE 43 FUSE 41 RED/WHT WIRE SEAT BELT BUCKLE (DRIVER) SEAT BELT SWITCH SOUND SYSTEM SPLICE PACK TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRANSMISSION CONTROL MODULE (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPARTMENT) W/RADIO WHT WIRE YEL WIRE

1 2 3 4 9 10 BATTERY (+) BATTERY (+) BATTERY (+) BATTERY (+) GROUND BATTERY (+) BCM FUSE BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (ON LOWER LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM CREW CAB ONLY CTSY FUSE DIM FUSE DK GRN WIRE DOOR LATCH ASSEMBLY (LEFT REAR) DOOR LATCH ASSEMBLY (PASSENGER) DOOR LATCH ASSEMBLY (RIGHT REAR) DOOR LATCH ASSEMBLY- DRIVER DOOR LOCKS SYSTEM FUSE BLOCK (I/P) (LEFT SIDE OF DASH) GRY WIRE GRY/BLK WIRE HEAD HEADLAMP, PANEL DIMMER SWITCH HOT AT ALL TIMES IS LPS FUSE JUNCTION BLOCK (LEFT I/P) JUNCTION BLOCK (RIGHT I/P) (IN RIGHT END OF DASH) LEFT FRONT DOOR OPEN SW LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE LT STOP TRN FUSE PARK AUTO OFF PARK BRAKE SW SIGNAL PNK IG III WIRE PNK WIRE RED/WHT WIRE RT STOP TRN FUSE STOP LAMPS FUSE TAN WIRE TAN/BLK WIRE TAN/WHT WIRE WHT WIRE

1 8 13 B+ LOW REF LO SPD DATA BLK WIRE BLK/WHT WIRE BLU WIRE CHIME MODULE (EXCEPT W/RADIO) (CENTER OF DASH) COMPUTER DATA LINES SYSTEM DIESEL DK GRN WIRE DLIS FUSE 36 FUSE 34 DRIVER SEAT BELT SW SIG DRIVER'S INFO CENTER DRIVER'S SEAT BELT WARNING LED EXCEPT W/RADIO GAS DIESEL GMLAN LO-SPD SERIAL DATA GRY WIRE HOT AT ALL TIMES IGNITION SWITCH INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (UNDER DRIVER'S SEAT) INSTRUMENT PANEL CLUSTER IPC FUSE 48 FUSE 46 JUNCTION BLOCK (LEFT I/P) (LOWER LEFT SIDE OF DASH) KEY-IN IGNITION SWITCH LOGIC LT BLU WIRE NCA WIRE PARK BRAKE SWITCH (ON PARK BRAKE PEDAL ASSEMBLY) PARK/NEUTRAL POSITION SWITCH (ON LEFT REAR SIDE OF TRANSMISSION) PNK LOW REF WIRE PNK PNK SUPPLEMENTAL RESTRAINTS SYSTEM WIRE PNK WIRE RADIO (W/RADIO) (CENTER OF DASH) RANGE SW - C RANGE SW A RANGE SW B RANGE SW P RDO FUSE 43 FUSE 41 RED/WHT WIRE SEAT BELT BUCKLE (DRIVER) SEAT BELT SWITCH SOUND SYSTEM SPLICE PACK TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRANSMISSION CONTROL MODULE (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPARTMENT) W/RADIO WHT WIRE YEL WIRE

7 3 SUPPLY VOLT LOW REF BATTERY BLK WIRE COMPUTER DATA LINES SYSTEM DDM FUSE 4 DK GRN WIRE DRIVER DOOR LOCK/ WINDOW SWITCH DRIVER OUTSIDE REARVIEW MIRROR GRN WIRE GROUND HOT AT ALL TIMES I/P FUSE BLOCK (LEFT SIDE OF DASH, LOGIC HVAC CONTROL MODULE LOW REF ORG/ WIRE PASSENGER DOOR LOCK/WINDOW SWITCH PASSENGER OUTSIDE REARVIEW MIRROR PDM FUSE 9 POWER DISTRIBUTION SYSTEM REAR DEFOGGER IND REAR DEFOGGER SWITCH RED WIRE RED/WHT WIRE RIGHT I/P JUNCTION BLOCK (IN RIGHT END OF DASH) SERIAL DATA SUPPLY VOLT WHT WIRE

12 VOLT REFERENCE BAT POS VOLT BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM DK GRN WIRE GROUND HOT AT ALL TIMES I/P FUSE BLOCK (LEFT SIDE OF DASH, LT GRN WIRE OUTSIDE IGN MOISTURE VOLT SENSOR SIGNAL OUTSIDE MOISTURE SENSOR SIGNAL OUTSIDE MOISTURE SIG 1 OUTSIDE MOISTURE SIG 2 POWER DISTRIBUTION SYSTEM RED/WHT WIRE RIGHT I/P JUNCTION BLOCK (IN RIGHT END OF DASH) RT STOP TRN FUSE 8 SERIAL DAT TAN WIRE WHT WIRE WINDSHIELD OUTSIDE MOISTURE SENSOR (NEAR INSIDE REARVIEW MIRROR MOUNT)

ANTENNA BLK WIRE BREAKOUT) COMPUTER DATA LINES SYSTEM DK GRN WIRE DRIVER INFORMATION CENTER (DIC) DSM FUSE FUSE BLOCK (I/P) (LEFT SIDE OF DASH) GRD (BELOW RIGHT SIDE OF PASSENGER SEAT) GRN WIRE HOT AT ALL TIMES INSTRUMENT PANEL CLUSTER (IPC) KEYLESS ENTRY ANTENNA LEFT FRONT TIRE PRESSURE MONITOR SENSOR LEFT REAR TIRE PRESSURE MONITOR SENSOR LO SPD SERIAL DATA LO-SPD DATA (TPM) IGN LOW TIRE PRESSURE IND MESSAGE REQUEST NCA WIRE RED WIRE REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR) (TOP REAR OF PASSENGER COMPARTMENT) RIGHT FRONT TIRE PRESSURE MONITOR SENSOR RIGHT REAR TIRE PRESSURE MONITOR SENSOR SOLID STATE W/ABS WHT WIRE

BATT POS VOLT GND BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM DK BLU/WHT WIRE DK GRN WIRE DRIVER INFORMATION CENTER (DIC) HOT AT ALL TIMES I/P WINDSHIELD WASHER SOLVENT HEATER SWITCH MULTI- FUNCTION SWITCH IGN I/II INSTRUMENT PANEL CLUSTER (IPC) LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LOGIC LOW SPD GMLAN SERIAL DATA LT GRN WIRE NCA WIRE ORG/ WIRE PNK WIRE RED/BLK WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WASHER FLD HTD CTRL SW LED SUPPLY VOLT GND WNDSHLD WASHER SW SIG IGNITION 3 VOLT WINDSHIELD WASHER SOLVENT HEATER (LEFT REAR CORNER OF ENGINE COMPT) WINDSHIELD WASHER SW SIG PNK WIRE WIPER/ WASHER CIRCUIT WSW/HTR FUSE 66 (EXCEPT 6.6L) FUSE 61 (6.6L)

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) FRONT WASHER DIODE FRT WASH FUSE 7 (EXCEPT 6.6L) FRT WASH PCB RELAY FRT WPR FUSE 36 (EXCEPT 6.6L) WPR FUSE 33 (6.6L) FUSE 5 (6.6L) GROUND DISTRIBUTION SYSTEM GRY WIRE HI LO HI LO OFF INT HOT AT ALL TIMES I/P FUSE BLOCK (LEFT SIDE OF DASH, INSTRUMENT PANEL CLUSTER (IPC) LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LOW WASHER FLUID IND SERIAL CTRL DATA LOGIC LT BLU WIRE LT GRN WIRE MIST MIST OFF INT WIPER SWITCH ORG/ WIRE PNK WIRE PPL RED/WHT WIRE RT STOP TRN FUSE 8 SERIAL DATA TAN WIRE TAN/BLK WIRE TURN SIGNAL/ MULTI-FUNCTION SWITCH 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 WNDSHLD WIPER SW SIG 2 YEL WIRE