Chevrolet Tahoe III (2006-2014) computer data lines system Wiring diagrams

1 2 3 4 NOT USED MTR PWR FEED GROUND 5-VOLT REF 2 3 7 5-VOLT REF NOT USED RLY CONTROL 6 17 DATA BUS + DATA BUS - 8 36 56 51 72 PUMP MTR GND LOW REF 5-VOLT REF DATA BUS - DATA BUS + AIR INLET DRIVER MOTOR BATTERY TEMPERATURE SENSOR AIR OUTLET DRIVER MOTOR BATTERY TEMPERATURE SENSOR AUXILIARY FUSE BLOCK BECM FAN FUSE 2 BLK WIRE BLK/YEL WIRE BLU WIRE COMPUTER DATA LINES SYSTEM COOL PUMP FUSE 6 COOL PUMP RELAY DK BLU WIRE DK GRN WIRE DK GRN/BLK WIRE DRIVE MOTOR GENERATOR BATTERY (UNDER REAR OF VEHICLE) DRIVER MOTOR BATTERY DRIVER MOTOR BATTERY TEMPERATURE SENSOR 3 DRIVER MOTOR BATTERY TEMPERATURE SENSOR 4 DRIVER MOTOR GENERATOR BATTERY CONTROL MODULE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT) GENERATOR BATTERY VENT FAN RELAY GENERATOR CONTROL MODULE TEMPERATURE SENSOR (RIGHT FRONT OF ENGINE COMPT) GRN WIRE HOT AT ALL TIMES LEFT GENERATOR CONTROL MODULE COOLANT PUMP (LEFT FRONT OF ENGINE COMPT) LOGIC GENERATOR BATTERY VENT FAN ORG/ WIRE PNK/DK BLU WIRE RED WIRE RED/WHT WIRE RIGHT GENERATOR CONTROL MODULE COOLANT PUMP (CENTER FRONT OF ENGINE COMPT) TAN WIRE TAN/BLK WIRE TEMPERATURE SENSOR 1 TEMPERATURE SENSOR 2 WHT WIRE WHT/GRN WIRE YEL WIRE

12 13 PPL BRK SIG 16 17 10 19 GMLAN GMLAN GMLAN COMM DATA AUX HVAC-IGN FUSE 48 BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LEFT SIDE OF DASH) BRAKE ABS IND WARNING IND BRAKE BOOSTER VACUUM SENSOR (BRAKE BOOSTER UNIT) BRAKE FLUID LEVEL SWITCH (BRAKE FLUID RESERVOIR) CADILLAC GMC/CHEVROLET COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DRIVER INFORMATION CENTER (DIC) DISPLAY GRY WIRE GRY/WHT WIRE HOT W/ RUN/CRNK RELAY ENERGIZED I/P MULTI-FUNCTION SWITCH (GMC/CHEVROLET) TRACTION CONTROL SWITCH INSTRUMENT PANEL CLUSTER (IPC) LOGIC LT BLU WIRE LT GRN WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PARK BRAKE SWITCH (PARK BRAKE ASSEMBLY) PNK WIRE PPL PRK BRK SW RIGHT FRONT WHEEL SPEED SENSOR (WSS) (RIGHT FRONT WHEEL HUB ASSEMBLY) STEERING ANGLE SENSOR (BASE OF STEERING COLUMN) STOP LAMP SWITCH (TOP OF BRAKE PEDAL BRACKET) TAN WIRE TAN/BLK WIRE TRACTION SW UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VEHICLE DYNAMICS IND YEL WIRE YEL/BLK WIRE

ABS-1 FUSE 61 BLK WIRE BLK/WHT WIRE BRAKE PRESSURE MODULATOR BRN WIRE COMM DATA COMPUTER DATA LINES SYSTEM DIMMING CTRL CAN BUS HI DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) (LEFT REAR FRAME RAIL) GND GMLAN+ GMLAN+ LF WHEEL SENS CTRL LF WHEEL SENS SIG GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HEAVY DUTY ABS FUSE 59 HOT AT ALL TIMES LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/BLK WIRE RADIO RED WIRE RED/BLK WIRE SERIAL DATA B+ GMLAN- GMLAN- LOW REF RF WHEEL SENS CTRL STEERING ANG SENS B CAN BUS LOW STEERING ANGLE SENSOR (BASE OF STEERING COLUMN) TAN WIRE TAN/BLK WIRE TAN/WHT WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VALVE (BPMV) VSS W/ LUXURY EDITION W/O LUXURY EDITION YAW RATE, LATERAL ACCELERATION SENSOR (UNDER FRONT PASSENGER'S SEAT) YEL WIRE YEL/BLK WIRE

12 13 PPL BRK SIG 16 17 10 19 GMLAN GMLAN GMLAN COMM DATA ACCESSORY SWITCH AUX HVAC-IGN FUSE 48 BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LEFT SIDE OF DASH) BRAKE ABS IND IND BRAKE FLUID LEVEL SWITCH (BRAKE FLUID RESERVOIR) BRN WIRE CADILLAC GMC/CHEVROLET COMPUTER DATA LINES SYSTEM DK GRN WIRE DRIVER INFORMATION CENTER (DIC) DISPLAY GRY/BLK WIRE GRY/WHT WIRE HOT W/ RUN/CRNK RELAY ENERGIZED INSTRUMENT PANEL CLUSTER (IPC) LEFT FRONT WHEEL SPEED SENSOR (WSS) (LEFT FRONT WHEEL HUB ASSEMBLY) LEFT REAR WHEEL SPEED SENSOR (WSS) (LEFT REAR WHEEL HUB ASSEMBLY) LOGIC LT BLU WIRE LT BLU/BLK WIRE NCA WIRE ORG/WHT WIRE PARK BRAKE SWITCH (PARK BRAKE ASSEMBLY) PNK WIRE PPL PRK BRK SW RIGHT FRONT WHEEL SPEED SENSOR (WSS) (RIGHT FRONT WHEEL HUB ASSEMBLY) RIGHT REAR WHEEL SPEED SENSOR (WSS) (RIGHT REAR WHEEL HUB ASSEMBLY) STOP LAMP SWITCH (TOP OF BRAKE PEDAL BRACKET) TAN WIRE TAN/BLK WIRE TRAC DISABLED IND TRACTION SW UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT)

1 2 B+ VOLT 1 3 4 B+ SNS SIG SNS SIG 109 5531 PPL 12 14 15 LIFTGATE SW RR AJAR SW LR AJAR SW 1851 5060 COMPUTER DATA LINES SYSTEM 3 10 B+ GMLAN 3 4 5 GND GMLAN 3840 5060 COMPUTER DATA LINES SYSTEM 4 6 B+ GND 5 13 9 LO REF LF AJAR SW GMLAN 5 13 9 LO REF RF AJAR SW GMLAN AUXILIARY FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) B+ SNS SIG SNS SIG BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LEFT SIDE OF DASH) BRN WIRE COMPUTER DATA LINES SYSTEM DDM FUSE DK BLU WIRE DK GRN WIRE DLIS FUSE 35 DRIVER DOOR LOCK/WINDOW SWITCH ENG COMPT) ENGINE CONTROL MODULE (LEFT SIDE OF EXCEPT 6.0L (VIN J) 6.0L (VIN J) EXCEPT HYBRID FUSE 52 GRY WIRE GRY/BLK WIRE HDLP RLY HOOD AJAR SWITCH (W/ REMOTE HORN RLY HORNS SYSTEM EXTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM HOT AT ALL TIMES HOT AT ALL TIMES I/P BLOCK DIM FUSE BCM FUSE (LEFT END OF DASH) IGN VOLT IGNITION SWITCH INSTRUMENT PANEL CLUSTER (IPC) INTRUS SIG LIFTGATE LATCH ASSEMBLY (CENTER OF LIFTGATE) LIFTGATE WINDOW AJAR SWITCH LIFTGATE WINDOW LATCH ASSEMBLY (BOTTOM CENTER OF LIFT GLASS) LO SPD GMLAN LOCK LOCK CONTROL) (HOOD LATCH ASSEMBLY) LOGIC LT BLU/BLK WIRE LT GRN/BLK WIRE NCA WIRE PASSENGER DOOR LATCH ASSEMBLY CHEVROLET/GMC CADILLAC (FRONT PASSENGER'S DOOR) PASSENGER DOOR LOCK/WINDOW SWITCH PDM FUSE PNK PPL WIRE PNK WIRE PNK/ 8 3 SW SIG SW SIG WIRE PNK/BLK WIRE PNK/WHT WIRE POWER DISTRIBUTION SYSTEM POWER LIFTGATE MODULE (LEFT REAR OF CARGO AREA) PPL PPL AJAR SW SIG PPL INTRUS SIG PPL PPL PPL SW SIG PRK LP RLY RED/WHT WIRE RIGHT I/P JUNCTION BLOCK (RIGHT END OF DASH) RIGHT REAR DOOR LATCH ASSEMBLY (RIGHT REAR DOOR) RUN WIRE SEC IND SECURITY IND SECURITY INDICATOR LAMP SW SIG THEFT DETERRENT MODULE (ON IGNITION SWITCH) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VEHICLE INCLINATION SENSOR VEHICLE SHOCK SENSOR W/ POWER LIFTGATE PPL W/O POWER LIFTGATE WIPER/ WASHER SYSTEM YEL WIRE

5 VOLT REF ACCESSORY WAKEUP SERIAL DATA ANTI-THEFT SYSTEM BATTERY BCM FUSE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LEFT SIDE OF DASH) BRAKE SW SIG COMPUTER DATA COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM CRUISE CTRL DIMM SIG CTSY FUSE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DRL RELAY CTRL EXCEPT HYBRID FOG LAMP RELAY CTRL FRONT FOG LAMP SW SIG GRN/WHT WIRE GROUND GRY WIRE HEADLAMP HI BEAM RELAY CTRL HEADLIGHTS SYSTEM HI SPD GMLAN SERIAL DATA BUS + HOOD AJAR SW SIG HOT AT ALL TIMES I/P FUSE BLOCK (LEFT END OF DASH) I/P LAMP DIMMER SW SIG INDICATOR DIM CTRL INTERIOR LIGHTS IPC FUSE 46 IS LAMPS FUSE LED DIM CTRL LINES SYSTEM LO SPD SERIAL DATA LOW REF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE LT STOP TRN FUSE LT TRLR TURN SIG LAMP NET WORK BUS NOT USED ORG/ WIRE ORG/WHT WIRE PNK/BLK WIRE POWER DISTRIBUTION SYSTEM PPL/WHT WIRE RED/WHT WIRE RIGHT I/P JUNCTION BLOCK (RIGHT END OF DASH) RT FRT TURN SIG LAMP CTRL RT STOP TRN FUSE RT TRLR TURN SIG LAMP RUN/CRANK RELAY CTRL SECURITY IND CTRL SERIAL DATA COMM ENABLE STOP LAMPS FUSE SYSTEM TAN WIRE TAN/BLK WIRE TAN/WHT WIRE UNDERHOOD FUSE BLOCK WASHER RELAY CTRL WIPER MOTOR PARK SW SIG WIPER/WASHER SYSTEM YEL WIRE

2500 2501 451 COMPUTER DATA LINES SYSTEM 28 27 73 72 51 73 SER DATA BUS+ SER DATA BUS- GROUND 71 72 66 67 VSS HI SIG VSS LO SIG 9 20 56 29 30 36 32 23 7 20 33 47 36 35 49 37 BRK SW SIG BATT + ACCELERATOR PEDAL POSITION (APP) SENSOR (ACCELERATOR PEDAL ASSEMBLY) APP SEN 1 SIG LOW REF APP SEN 2 SIG LOW REF PPL BATT + BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LEFT SIDE OF DASH) BRAKE SIG BRK AP SIG BRN WIRE CADILLAC CHEVROLET, GMC COMPUTER DATA LINES SYSTEM CRUISE CONTROL IND DIMMING SIG CRUISE CONTROL SWITCH SIGNAL CRUISE IND DK BLU WIRE DK GRN WIRE ECM BATT FUSE 12 ELECTRONIC BRAKE CONTROL MODULE (EBCM) (LEFT REAR FRAME RAIL) (HYBRID) EXCEPT HYBRID GMLAN GRN/WHT WIRE GROUND GROUND DISTRIBUTION SYSTEM GRY WIRE HI SPD GMLAN SER DATA BUS- HOT AT ALL TIMES HOT AT ALL TIMES I/P FUSE BLOCK (LEFT END OF DASH) BCM FUSE HOT W/ RUN/CRANK RELAY ENERGIZED INSTRUMENT PANEL CLUSTER (IPC) IPC FUSE 46 LEFT I/P JUNCTION BLOCK (LEFT END OF DASH) LOGIC LT BLU WIRE LT BLU/WHT WIRE LT GRN/BLK WIRE MISC-IGN FUSE 43 ORG/BLK WIRE ORG/WHT WIRE PNK PNK WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL PPL BRAKE SW SIG PPL/WHT WIRE RED/WHT WIRE STOP LAMP SWITCH (TOP OF BRAKE PEDAL BRACKET) TAN WIRE TAN/BLK WIRE THROTTLE BODY (FRONT OF INTAKE MANIFOLD) TP SENS 1 SIG LOW REF TP SENS 2 SIG TAC MOTOR CTRL 2 TAC MOTOR CTRL 1 TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (VSS) (RIGHT REAR OF TRANSMISSION) W/ ACTIVE 2 SPEED PUSH BUTTON CONTROL TRANSFER CASE W/O ACTIVE 2 SPEED PUSH BUTTON CONTROL TRANSFER CASE W/O ACTIVE 2 SPEED PUSH BUTTON CONTROL TRANSFER CASE, HYBRID WHT LT BLU/ WIRE WHT/BLK WIRE YEL WIRE

AUTOMATIC TRANSMISSION BLK WIRE BRN WIRE COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY CRUISE SWITCH DATA BUS - DK BLU WIRE EXCEPT HYBRID GRN WIRE GRN/WHT WIRE GRY WIRE IN SPD SENS (ISS) SIG INPUT SPEED SENSOR (ISS) (6 SPEED A/T) ISS/OSS CTRL LEFT STEERING WHEEL CONTROL SWITCH ORG/BLK WIRE ORG/WHT WIRE OUT SPD SENS (OSS) RTN OUT SPD SENS (OSS) SIG OUTPUT SHAFT SPEED (OSS) SENSOR (2 MODE HYBRID) OUTPUT SPEED SENSOR (OSS) (6 SPEED A/T) PNK WIRE PPL/WHT WIRE RED WIRE REPLICATED TOS SIG RES+ SET- SOUND SYSTEMS TAN WIRE TAN/BLK WIRE TRANSMISSION CONTROL MODULE (TCM) WAKE UP SERIAL DATA YEL WIRE

7 3 SUPPLY VOLT LOW REF BATT POS VOL BATTERY BLK WIRE COMPUTER DATA LINES SYSTEM DDM FUSE DEFOG IND DK GRN WIRE DRIVER DOOR LOCK/WINDOW SWITCH DRIVER OUTSIDE REARVIEW MIRROR (IF EQUIPPED) GMLAN SER DATA GROUND HOT AT ALL TIMES HVAC CONTROL MODULE I/P FUSE BLOCK (LEFT END OF DASH) IGN LOGIC LOW REF PASSENGER DOOR LOCK/WINDOW SWITCH PASSENGER OUTSIDE REARVIEW MIRROR (IF EQUIPPED) PDM FUSE POWER DISTRIBUTION SYSTEM REAR DEFOG SWITCH RED WIRE RED/WHT WIRE RIGHT I/P JUNCTION BLOCK (RIGHT END OF DASH) SERIAL DATA SUPPLY VOLT WHT WIRE

2501 2500 COMPUTER DATA LINES SYSTEM 465 945 239 1580 5986 ENGINE CONTROLS SYSTEM B+ RLY ENABLE BLK WIRE BODY MOUNT) (W/ 20 SERIES HYBRID) BODY MOUNT) TRAILER BRAKE CONTROL RELAY (UNDER LEFT REAR OF VEHICLE) BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN/WHT WIRE DRAIN WIRE ENABLE SIG TRL BRK RLY IGN 1 FUEL PUMP CTRL COMM DATA FRONT FUEL, FUEL PRESSURE SENDER ASSEMBLY SENSOR (EXCEPT 6.0L (VIN G)) FSCM FUSE 21 FUEL PUMP CTRL GMLAN - GMLAN + GRY WIRE HOT AT ALL TIMES HOT AT ALL TIMES UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) HOT W/ RUN/CRNK RELAY ENERGIZED LOW REF GMLAN - GMLAN + LOW REF RLY FEEDBACK PRESS SENS SIG GAIN SIG LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE MISC-IGN FUSE 43 NCA WIRE PNK PNK WIRE PNK WIRE POWER DISTRIBUTION SYSTEM POWER DISTRIBUTION SYSTEM PPL RED/BLK WIRE RED/WHT WIRE STOP LAMP SWITCH (TOP OF BRAKE PEDAL BRACKET) STUD 2 FUSE 63 TAN WIRE TAN/BLK WIRE TCC BRK SIG TRAILER BRAKE CONTROL SWITCH TRAILER CONNECTOR (CENTER REAR OF VEHICLE) TRL BRK SIG TRL BRK SIG RLY FEEDBACK W/ 10 SERIES W/ 20 SERIES YEL WIRE YEL/BLK WIRE