Chevrolet Silverado 1500 (2000-2012) computer data lines system Wiring diagrams

13 34 12 59 58 17 27 28 8 65 25 13 5 49 44 43 LOW REF 22 21 4 58 LOW REF ECT SENS SIG 4.8L, 5.3L, 6.2L 4.3L BLK WIRE COMPUTER DATA LINES SYSTEM COOLING FAN DIODE 1 COOLING FAN DIODE 2 DK BLU/WHT WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) FAN CNTRL RELAY FAN HI RELAY FAN LO RELAY FAN-1 FUSE 60 FAN-2 FUSE 62 GRY WIRE HOT AT ALL TIMES LEFT COOLING FAN (LEFT FRONT OF ENGINE COMPT) LT BLU WIRE ORG/BLK WIRE PWR/ TRN RELAY RIGHT COOLING FAN (RIGHT FRONT OF ENGINE COMPT) SENS SIG PWRTRN RLY CTRL FAN RLY CTRL FAN RLY CTRL DATA BUS (-) DATA BUS (+) TAN WIRE TAN/BLK WIRE UNDER- HOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) YEL WIRE

13 34 12 59 58 17 27 28 8 65 25 13 5 49 44 43 LOW REF 22 21 4 58 LOW REF ECT SENS SIG 4.8L, 5.3L, 6.2L 4.3L BLK WIRE COMPUTER DATA LINES SYSTEM COOLING FAN DIODE 1 COOLING FAN DIODE 2 DK BLU/WHT WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) FAN CNTRL RELAY FAN HI RELAY FAN LO RELAY FAN-1 FUSE 60 FAN-2 FUSE 62 GRY WIRE HOT AT ALL TIMES LEFT COOLING FAN (LEFT FRONT OF ENGINE COMPT) LT BLU WIRE ORG/BLK WIRE PWR/ TRN RELAY RIGHT COOLING FAN (RIGHT FRONT OF ENGINE COMPT) SENS SIG PWRTRN RLY CTRL FAN RLY CTRL FAN RLY CTRL DATA BUS (-) DATA BUS (+) TAN WIRE TAN/BLK WIRE UNDER- HOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) YEL WIRE

13 26 12 40 13 34 12 59 58 17 27 28 8 65 25 13 5 49 44 43 LOW REF 22 21 4 58 LOW REF ECT SENS SIG 4.3L 6.0L 4.8L, 5.3L, 6.2L BLK WIRE COMPUTER DATA LINES SYSTEM COOLING FAN DIODE 1 COOLING FAN DIODE 2 DK BLU/WHT WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) FAN CNTRL RELAY FAN HI RELAY FAN LO RELAY FAN-1 FUSE 60 FAN-2 FUSE 62 GRY WIRE HOT AT ALL TIMES LEFT COOLING FAN (LEFT FRONT OF ENGINE COMPT) LT BLU WIRE ORG/BLK WIRE PWR/ TRN RELAY RIGHT COOLING FAN (RIGHT FRONT OF ENGINE COMPT) SENS SIG PWRTRN RLY CTRL FAN RLY CTRL FAN RLY CTRL DATA BUS (-) DATA BUS (+) TAN WIRE TAN/BLK WIRE UNDER- HOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) YEL WIRE

12 VOLT REF 12-VOLT REF ANGLE SENSOR PHASE B CAN BUS LOW SERIAL DATA 12-VOLT REF LF WHEEL SPD SENS SIG 16 17 2500 2501 COMPUTER DATA BUS + DATA BUS - DATA LINES SYSTEM 2501 2501 COMPUTER DATA LINES SYSTEM 3 5 SENS PHASE A SENS PHASE C 5-VOLT REF VEHICLE SPEED SIGNAL CAN BUS HIGH SERIAL DATA ABS INDICATOR ABS-1 FUSE 61 (GAS) FUSE 56 (DIESEL) BLK WIRE BLK/ WHT WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) BRAKE FLUID LEVEL SWITCH (ON BRAKE MASTER CYLINDER RESERVOIR) BRAKE PRESSURE MODULATOR VALVE BRAKE WARNING INDICATOR BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) (ON LEFT SIDE OF FRAME ASSEMBLY) EXCEPT LUXURY GAS GROUND GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HI SERIAL DATA HOT AT ALL TIMES I/P MULTI-FUNCTION SWITCH INSTRUMENT PANEL CLUSTER (IPC) IPC FUSE LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LEFT REAR WHEEL SPEED SENSOR (WSS) (ON LEFT REAR BRAKE BACKING PLATE) LO SERIAL DATA LOGIC LOW REF 12-VOLT REF LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE LUXURY NCA WIRE ORG/BLK WIRE ORG/WHT WIRE PARK BRAKE SW SIG PARK BRAKE SWITCH (ON PARK BRAKE PEDAL ASSEMBLY) POWER DISTRIBUTION SYSTEM PPL PPL BRAKE SW SIG RED/BLK WIRE RED/WHT WIRE RIGHT REAR WHEEL SPEED SENSOR (WSS) (ON RIGHT REAR BRAKE BACKING PLATE) SENS PHASE B SERIAL DATA SERIAL DATA BATTERY POSITIVE VOLTAGE SERIAL DATA BUS (+) SERIAL DATA BUS (+) BATTERY POSITIVE VOLTAGE SERIAL DATA BUS- SERIAL DATA BUS- GROUND SIG TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRACTION CONTROL SWITCH SIGNAL TRACTION CTRL SW SIG VEHICLE SPD SIG RADIO YAW RATE, LATERAL ACCELERATION SENSOR (UNDER CENTER CONSOLE TRIM PANEL) YEL WIRE YEL/BLK WIRE

12 VOLT REF 12-VOLT REF RF WHEEL SPD SENS SIG GROUND ABS INDICATOR ABS-1 FUSE 61 (GAS) FUSE 56 (DIESEL) BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) BRAKE FLUID LEVEL SWITCH (ON BRAKE MASTER CYLINDER RESERVOIR) BRAKE PRESSURE MODULATOR VALVE BRAKE WARNING INDICATOR COMPUTER DATA LINES SYSTEM DATA BUS - DIESEL GAS DK GRN WIRE DK GRN/WHT WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) (ON LEFT SIDE OF FRAME ASSEMBLY) ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT) EXCEPT LUXURY GAS GRY WIRE GRY/WHT WIRE HEAVY DUTY ABS FUSE 59 (GAS) FUSE 55 (DIESEL) HOT AT ALL TIMES HOT AT ALL TIMES UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) INSTRUMENT PANEL CLUSTER (IPC) IPC FUSE LEFT FRONT WHEEL SPEED SENSOR (WSS) (ON LEFT FRONT STEERING KNUCKLE) LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LOGIC LT BLU WIRE LT BLU/BLK WIRE LUXURY NCA WIRE NEAR FAN SHROUD) ORG/ WIRE ORG/WHT WIRE PARK BRAKE SW SIG PARK BRAKE SWITCH (ON PARK BRAKE PEDAL ASSEMBLY) POWER DISTRIBUTION SYSTEM PPL PPL BRAKE SW SIG RED WIRE RED/BLK WIRE RED/WHT WIRE RIGHT FRONT WHEEL SPEED SENSOR (WSS) (ON RIGHT FRONT STEERING KNUCKLE) SERIAL DATA SIG TAN WIRE TAN/BLK WIRE VEHICLE SPD SIG VEHICLE SPD SIG RADIO YEL WIRE YEL/BLK WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 B+ 5-VOLT REF 12-VOLT REF 12-VOLT REF LR SIG WHEEL SPD SENS 16 17 DATA BUS+ DATA BUS- 2 4 3 1 SERIAL DATA 12-VOLT SERIAL DATA LOW REF 21 22 23 24 25 26 27 12-VOLT REF LF WHEEL SPD SENS SIG 2500 2500 COMPUTER DATA LINES SYSTEM 2500 2501 COMPUTER DATA LINES SYSTEM 35 36 37 38 SERIAL DATA 6032 (OR 817) ABS INDICATOR ABS-1 FUSE 61 ABS-2 FUSE 9 BLK WIRE BLK/ WHT WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) BRAKE FLUID LEVEL SWITCH BRAKE PRESSURE MODULATOR VALVE BRAKE WARNING INDICATOR BRN WIRE CAN BUS HIGH SERIAL DATA GROUND COMPUTER DATA LINES SYSTEM DATA SERIAL DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) (ON LEFT SIDE OF FRAME ASSEMBLY) EXCEPT LUXURY GAS GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HOT AT ALL TIMES HOT AT ALL TIMES UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) I/P MULTI-FUNCTION SWITCH (W/ ACTIVE BRAKE CONTROL) INSTRUMENT PANEL CLUSTER (IPC) IPC FUSE 46 (GAS) FUSE 43 (DIESEL) LEFT FRONT WHEEL SPEED SENSOR (WSS) (ON LEFT FRONT STEERING KNUCKLE) LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LEFT REAR WHEEL SPEED SENSOR (WSS) (ON LEFT REAR BRAKE BACKING PLATE) LF WHEEL SPD SENS SIG LOGIC LOW REF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE LUXURY NCA WIRE ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PARK BRAKE SWITCH (ON PARK BRAKE PEDAL ASSEMBLY) PARK BRK SW POWER DISTRIBUTION SYSTEM PPL RADIO RED WIRE RED/BLK WIRE RED/WHT WIRE RF SIG WHEEL SPD SENS RIGHT FRONT WHEEL SPEED SENSOR (WSS) (ON RIGHT FRONT STEERING KNUCKLE) RIGHT REAR WHEEL SPEED SENSOR (WSS) (ON RIGHT REAR BRAKE BACKING PLATE) SENSOR PHASE A 5-VOLT REF BOOSTER VACUUM SENS SIG SERIES) SIG STEERING ANGLE SENS SIG STEERING ANGLE SENSOR STOP LAMP SWITCH (TOP OF BRAKE PEDAL ASSEMBLY) TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRACTION CONTROL SWITCH TRACTION CTRL SW SIG 12 13 12-VOLT REF PPL BRAKE SW SIG VEH SPD SIGNAL VEHICLE SPD SIG VEHICLE SPD SIG LOW REF GROUND SERIAL DATA BUS- SERIAL DATA BUS- W/ ACTIVE BRAKE CONTROL W/O ACTIVE BRAKE CONTROL WHT WIRE WHT/ BLK WIRE YAW RATE, LATERAL ACCELERATION SENSOR (W/ ACTIVE BRAKE CONTROL) YEL WIRE YEL/BLK 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

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(+) 5 VOLT REF AMB AIR TMP GMLAN L A/C COMPRESSOR A/C IND A/C ON A/C REFRIGERANT PRESSURE SENSOR ACCM FUSE 3 AMBIENT AIR TEMPERATURE SENSOR (ON LEFT SIDE OF RADIATOR SUPPORT) AMBIENT LIGHT/SUNLOAD SENSOR ASSEMBLY (TOP CENTER OF DASH) AUTO AUXILIARY FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) B+ GND GMLAN SERIAL BLK WIRE BLK/WHT WIRE CAB HTR PUMP FUSE 4 CAB HTR PUMP RELAY COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DRIVE MOTOR GENERATOR POWER INVERTER MODULE (RIGHT REAR OF ENGINE COMPT) FAN DN FAN UP FRESH AIR FRNT DFG FRT DEF FSH AIR GROUND DISTRIBUTION SYSTEM GROUND IGN 3 REAR DEFOG GROUND LOW REF GRY WIRE GRY/BLK WIRE HEATER COOLANT PUMP HOT AT ALL TIMES HVAC CONTROL MODULE 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 LT BLU WIRE LT BLU/BLK WIRE LT GRN/BLK WIRE MODE DN MODE UP OFF ORG/ WIRE PNK COOLING PUMP RLY CTRL WIRE PNK WIRE POWER DISTRIBUTION SYSTEM DEFOGGER SYSTEM PPL REAR DFG RECIR RECIRC RED/WHT WIRE RER DEF RIGHT SUNLOAD SENSOR RIGHT TEMP CONTROL SENS SIG RF SUNLD TAN WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

35 55 21 37 57 51 72 LOW REF ECT SENS SIG LOW REF 54 41 MED SPD FAN HI SPD FAN PPL A/C LOW PRESSURE SENSOR BATT POS VOLT BLK WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE ENG FUSE 4 ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE (ECT) SENSOR (ON TOP OF ENGINE) GROUND GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT W/ PWR/TRN RELAY ENERGIZED HVAC BATT FUSE 39 HVAC BLWR FUSE 70 HVAC-IGN FUSE 55 LOW REF LOW SPD FAN LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE MTR SPD CTRL 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 DATA BUS - DATA BUS + TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

19 14 LOW REF A/C REFRIG 5 3 GMLAN L 5 VOLT REF A/C COMPRESSOR A/C IND A/C LOW PRESSURE SENSOR A/C ON A/C REFRIGERANT PRESSURE SENSOR (RIGHT REAR OF ENGINE COMPT) ACCM FUSE 3 AUXILIARY FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) B+ GMLAN SERIAL GND BLK/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DRIVE MOTOR GENERATOR POWER INVERTER MODULE (RIGHT REAR OF ENGINE COMPT) ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT) GRY WIRE HOT AT ALL TIMES HVAC CONTROL MODULE LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LOGIC LOW REF SENS SIG GMLAN - GLMAN + ORG/ WIRE ORG/BLK WIRE RED/WHT WIRE TAN WIRE TAN/BLK WIRE