Chevrolet Chevy Express G2500 (1996-2012) blk Wiring diagrams

27 28 2501 2500 44 43 COMPUTER DATA LINES SYSTEM DATA BUS (-) DATA BUS (+) 4.3L 4.3L/5.3L 4.8L/6.0L BATTERY BATTERY CURRENT SENSOR (4.3L/5.3L) BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BRN WIRE CHARGE IND COMPUTER DATA LINES SYSTEM CURRENT SENSOR SIG DK GRN WIRE DRIVER INFORMATION CENTER (DIC) ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) EXCEPT 4.3L FUSIBLE LINK 3 GENERATOR GENERATOR FIELD DUTY CYCLE SIG GENERATOR TURN ON SIG GMLAN SERIAL DATA GRY WIRE HOT W/ RUN/CRANK RELAY ENERGIZED IGN VOLT INSTRUMENT PANEL CLUSTER (IPC) IP CLSTR FUSE 30 LOGIC LOW REF LOW SPEED GMLAN SERIAL DATA PNK WIRE ORG/ WIRE PNK WIRE POWER DISTRIBUTION SYSTEM RED WIRE SENS SIG STARTING CIRCUIT TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT WIRE

BATTERY BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) GMLAN SERIAL DATA CHARGING CIRCUIT COMPUTER DATA LINES SYSTEM CRNK RELAY 73 DATA BUS - DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) EXCEPT 4.3L 4.3L 28 43 FUSIBLE LINK 2 IGNITION LOCK CYLINDER IGNITION SWITCH IGNITION VOLTAGE OF ENGINE COMPT) OFF ORG/BLK WIRE PARK/NEUTRAL POSITION (PNP) SWITCH (ON LEFT SIDE OF TRANSMISSION) P/N PNK WIRE PPL RED WIRE RUN WIRE STARTER ENABLE RELAY CTRL STARTER MOTOR STRTR SOL FUSE 64 TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE WHT WIRE YEL/BLK WIRE

1-2 SHIFT SOLENOID VALVE 2-3 SHIFT SOLENOID VALVE 27 28 GMLAN (-) GMLAN (+) 68 71 1 MIL CTRL TOS SIG ACTUATOR SIG AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BRN WIRE BRN/WHT WIRE CLASS 2 CLASS 2 DATA COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) FLUID PRESSURE (TFP) MANUAL VALVE POSITION SWITCH GRY WIRE IGN IGN LOGIC INSTRUMENT PANEL CLUSTER (IPC) LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE PPL RED WIRE REV TAN WIRE TAN/BLK WIRE TORQUE CONVERTER CLUTCH (TCC) PULSE WIDTH MODULATION (PWM) SOLENOID VALVE TOW/ HAUL IND CLASS 2 TOW/HAUL SW TOW/HAUL SWITCH YEL WIRE YEL/BLK WIRE

27 28 2501 2500 44 43 COMPUTER DATA LINES SYSTEM DATA BUS (-) DATA BUS (+) 4.3L 4.3L/5.3L 4.8L/6.0L BATTERY BATTERY CURRENT SENSOR (4.3L/5.3L) BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BRN WIRE CHARGE IND COMPUTER DATA LINES SYSTEM CURRENT SENSOR SIG DK GRN WIRE DRIVER INFORMATION CENTER (DIC) ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) EXCEPT 4.3L FUSIBLE LINK 3 GENERATOR GENERATOR FIELD DUTY CYCLE SIG GENERATOR TURN ON SIG GMLAN SERIAL DATA GRY WIRE HOT W/ RUN/CRANK RELAY ENERGIZED IGN VOLT INSTRUMENT PANEL CLUSTER (IPC) IP CLSTR FUSE 30 LOGIC LOW REF LOW SPEED GMLAN SERIAL DATA PNK WIRE ORG/ WIRE PNK WIRE POWER DISTRIBUTION SYSTEM RED WIRE SENS SIG STARTING CIRCUIT TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT WIRE

BATTERY BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) GMLAN SERIAL DATA CHARGING CIRCUIT COMPUTER DATA LINES SYSTEM CRNK RELAY 73 DATA BUS - DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) EXCEPT 4.3L 4.3L 28 43 FUSIBLE LINK 2 IGNITION LOCK CYLINDER IGNITION SWITCH IGNITION VOLTAGE OF ENGINE COMPT) OFF ORG/BLK WIRE PARK/NEUTRAL POSITION (PNP) SWITCH (ON LEFT SIDE OF TRANSMISSION) P/N PNK WIRE PPL RED WIRE RUN WIRE STARTER ENABLE RELAY CTRL STARTER MOTOR STRTR SOL FUSE 64 TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE WHT WIRE YEL/BLK WIRE

1-2 SHIFT SOLENOID VALVE 2-3 SHIFT SOLENOID VALVE 27 28 GMLAN (-) GMLAN (+) 68 71 1 MIL CTRL TOS SIG ACTUATOR SIG AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BRN WIRE BRN/WHT WIRE CLASS 2 CLASS 2 DATA COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) FLUID PRESSURE (TFP) MANUAL VALVE POSITION SWITCH GRY WIRE IGN IGN LOGIC INSTRUMENT PANEL CLUSTER (IPC) LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE PPL RED WIRE REV TAN WIRE TAN/BLK WIRE TORQUE CONVERTER CLUTCH (TCC) PULSE WIDTH MODULATION (PWM) SOLENOID VALVE TOW/ HAUL IND CLASS 2 TOW/HAUL SW TOW/HAUL SWITCH YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOLENOID VALVE 2-3 SHIFT SOLENOID VALVE 30 45 39 MIL CTRL TOS SIG 44 57 GMLAN (-) GMLAN (+) ACTUATOR SIG AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BRN WIRE BRN/WHT WIRE CLASS 2 CLASS 2 DATA COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) FLUID PRESSURE (TFP) MANUAL VALVE POSITION SWITCH GRY WIRE IGN INSTRUMENT PANEL CLUSTER (IPC) LOGIC LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE PPL PRESSURE CONTROL (PC) SOLENOID VALVE RED WIRE REV TAN WIRE TAN YEL/BLK WIRE TAN/BLK WIRE TORQUE CONVERTER CLUTCH (TCC) PULSE WIDTH MODULATION (PWM) SOLENOID VALVE TOW/ HAUL IND CLASS 2 TOW/HAUL SW TOW/HAUL SWITCH YEL WIRE YEL/BLK WIRE

2 6 3 1 CAN BUS HI LO REF CAN BUS LO 3 21 DIMMING CTRL TRACTION SW 5.3L, 4.8L, 6.0L 4.3L 6 16 TCC BRAKE SIG PRK BRK SW ABS IND. ABS MDL FUSE 2 ABS MTR FUSE 1 BLK WIRE BLK/PPL WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BRAKE IND BREAKOUT TOWARDS INSTRUMENT PANEL CLUSTER) BRK SW FUSE 13 BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) FUSE 29 GRY WIRE GRY/BLK WIRE HI SPD GMLAN DATA + HI SPD GMLAN DATA + B+ HI SPD GMLAN DATA- HI SPD GMLAN DATA- GND HOT AT ALL TIMES HOT W/ RUN/CRNK RELAY 15 ENERGIZED IGN VOLT IGN VOLT STEERING SENS A STEERING SENS C INSTRUMENT PANEL CLUSTER (IPC) IP CLSTR FUSE 10 LEFT FRONT WHEEL SPEED SENSOR (WSS) (ON INSIDE OF LEFT FRONT WHEEL) LEFT REAR WHEEL SPEED SENSOR (WSS) (AT LEFT REAR WHEEL HUB) LF WHEEL SPD SENS LOW REF LOW REF LO SPD GMLAN LOGIC LOGIC STEERING WHEEL SPEED/ POSITION SENSOR (AT BASE OF STEERING COLUMN) LOW REF RF WHEEL SPD SENS LOW STABILITY IND LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PARK BRAKE SWITCH (UNDER LEFT PNK 7 3 5 6 2 4 1 8 WIRE PNK WIRE RED WIRE RED/BLK WIRE RED/WHT WIRE RIGHT FRONT WHEEL SPEED SENSOR (WSS) (ON INSIDE OF RIGHT FRONT WHEEL) RIGHT REAR WHEEL SPEED SENSOR (WSS) (AT RIGHT REAR WHEEL HUB) SERIAL DATA SERIAL DATA ENABLE B+ SIDE OF DASH) STEERING ANGLE SENS CAN BUS LO DATA STEERING SENS B STOP LAMP SWITCH (BEHIND LEFT SIDE OF DASH, ABOVE BRAKE PEDAL) STR/WHL SNSR (G) TAN WIRE TAN/BLK WIRE TRACTION CONTROL SWITCH UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) VDC IND VEHICLE SPD SIG CAN BUS HI DATA VEHICLE SPEED SIGNAL WHT WIRE WHT/BLK WIRE YAW, LATERAL ACCELERATION SENSOR (UNDER FRONT PASSENGER SEAT) YEL WIRE YEL/BLK WIRE

5.3L, 4.8L, 6.0L 4.3L 6.6L ABS IND. ABS MDL FUSE 2 ABS MTR FUSE 1 B+ SERIAL DATA ENABLE VEHICLE SPD SIG BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BRAKE BOOSTER FLUID FLOW ALARM SWITCH (IN POWER STEERING PUMP OUTLET HOSE) BRAKE FLUID LEVEL SWITCH (AT LEFT REAR OF ENGINE COMPT) BRAKE IND BRAKE PRESSURE DIFFERENTIAL SWITCH (ON BRAKE VALVE, NEAR FRONT OF EBCM) BRK FLUID LEVEL SENSOR SIG BRAKE WARNING INDICATOR CTRL BRK SW FUSE 13 COMPUTER DATA LINES SYSTEM DK GRN WIRE GND HI SPD GMLAN BUS - HI SPD GMLAN BUS - HEAVY DUTY HOT AT ALL TIMES HOT W/ RUN/CRNK RELAY 15 ENERGIZED INSTRUMENT PANEL CLUSTER (IPC) IPC FUSE 10 LEFT FRONT WHEEL SPEED SENSOR (WSS) (ON INSIDE OF LEFT FRONT WHEEL) LF WHEEL SPEED SENS LOW REF LIGHT DUTY LO SPD GMLAN LOGIC LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE OF DASH, ABOVE BRAKE PEDAL) PARK BRAKE SWITCH (UNDER LEFT PNK WIRE PPL PRK BRK SW RED/BLK WIRE RED/WHT WIRE RF WHEEL SPD SENS LOW REF RIGHT FRONT WHEEL SPEED SENSOR (WSS) (ON INSIDE OF RIGHT FRONT WHEEL) SIDE OF DASH) SIGNAL ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) STOP LAMP SWITCH (BEHIND LEFT SIDE TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC BRAKE SIG TOWARDS INSTRUMENT PANEL CLUSTER) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED YEL WIRE YEL/BLK WIRE

21 19 69 14 71 CTRL SPD SIG CTRL SPD SIG SPEED SIG BLK WIRE BLK/WHT WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM COOLANT LEVEL SWITCH COOLING FAN ASSEMBLY (BEHIND RADIATOR) DK BLU WIRE DK GRN WIRE DRIVER INFORMATION CENTER (DIC) DISPLAY ENGINE CONTROL MODULE (ECM) ENGINE COOLANT GAUGE TEMPERATURE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (TOP OF ENGINE, NEAR THERMOSTAT HOUSING) FAN CLTCH (EV) FUSE 63 GRY WIRE HOT W/ PWR/TRN RELAY 49 ENERGIZED INSTRUMENT PANEL CLUSTER (IPC) LOGIC LOW REF LOW SPD GMLAN SERIAL DATA LT GRN WIRE PNK WIRE SENS SIG LOW REF TAN WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL WIRE