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

2 3 SERIAL DATA SERIAL DATA 5.3L 6.6L 4.8L, 5.3L, 6.0L 4.3L ACC WAKE UP SERIAL DATA 11 15 19 7 6 38 37 5985 2501 2500 2500 2501 2500 2501 ACC WAKE-UP SERIAL DATA BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER CHIME MODULE (BEHIND LEFT CENTER OF DASH) CONTROL EXCEPT 6.6L W/O ACTIVE BRAKE CONTROL COOLANT HEATER (6.6L) DATA BUS+ DATA BUS+ DATA BUS- DATA BUS- DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) DATA LINK RESISTOR DK BLU WIRE DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) ELECTRONIC CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) EXCEPT 5.3L EXCEPT 6.6L W/ ACTIVE BRAKE FUEL PUMP FLOW CONTROL MODULE (5.3L) (AT REAR OF GLOW PLUG CONTROL MODULE (GPCM) (6.6L) HOT AT ALL TIMES INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) (UNDER LEFT FRONT SEAT) INSTRUMENT PANEL CLUSTER (IPC) LIGHT DUTY W/O RECREATIONAL VEHICLE, UPFITTER SALES PACKAGE LTR/DLC FUSE 38 RADIO RED WIRE RED/WHT WIRE REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR) (IF EQUIPPED) (BEHIND CENTER OF DASH) SERIAL DATA SPLICE PACK TAN WIRE TAN/BLK WIRE TRANSMISSION CONTROL MODULE (TCM) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) UNDERHOOD PASS THROUGH GROMMET) VEHICLE, ATTACHED TO LEFT REAR FRAME RAIL) W/ AUXILIARY FUEL FIRED HEATER W/ RADIO PROVISIONS W/O AUXILIARY FUEL FIRED HEATER W/O RADIO PROVISIONS WHT WIRE

14 13 15 5 BRAKE LOW REF BRAKE SENS SIG 15 5 38 45 61 11 54 26 42 FUEL TEM SIG BRAKE APPLY SEN SIG LOW REF 43 44 28 27 SER DATA BUS(+) SER DATA BUS(-) 6.6L 53 57 40 59 32 16 3 65 35 63 5 6 ACCELERATOR PEDAL POSITION (APP) SENSOR (UNDER LEFT SIDE OF DASH) APP SEN 1 SIG LOW REF APP SEN 2 SIG LOW REF PPL AUTOMATIC TRANSMISSION (6 SPEED A/T) AUTOMATIC TRANSMISSION OUTPUT SHAFT SPEED (OSS) SENSOR AUTOMATIC TRANSMISSION OUTPUT SHAFT SPEED (OSS) SENSOR ASSEMBLY BATT + BCM 2 FUSE 58 BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BRAKE PEDAL POSITION (BPP) SENSOR (TOP OF BRAKE PEDAL ASSEMBLY) BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY CRUISE CONTROL IND DIMMING SIG CRUISE CONTROL SWITCH SIGNAL CRUISE IND CRUISE SWITCH DATA BUS - DATA BUS + VSS LOW SIG VSS HIGH SIG DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM BATT FUSE 19 ENGINE CONTROL MODULE (ECM) GMLAN GROUND GRY WIRE HI SPD GMLAN SER DATA BUS- HOT AT ALL TIMES HOT W/ RUN/CRANK RELAY 15 ENERGIZED IGN INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL (AT TOP OF STEERING COLUMN) INSTRUMENT PANEL CLUSTER (IPC) IPC FUSE 10 LEFT STEERING WHEEL CONTROL SWITCH LOGIC LT BLU WIRE LT GRN/BLK WIRE PNK WIRE PPL PPL/WHT WIRE RED WIRE RED/WHT WIRE RES+ SET- TAN WIRE TAN/BLK WIRE THROTTLE BODY (EXCEPT 6.6L) TP SENS 1 SIG LOW REF TP SENS 2 SIG TAC MOTOR CTRL 2 TAC MOTOR CTRL 1 TRANS- MISSIONS SYSTEM TRANSMISSION CONTROL MODULE (4 SPEED A/T) TRANSMISSION CONTROL MODULE (TCM) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL WIRE

A/C HIGH PRESSURE SWITCH AUXILIARY AIR TEMPERATURE ACTUATOR AUXILIARY MODE ACTUATOR (LEFT REAR OF PASSENGER COMPT) BLK WIRE BLOW FUSE 51 BLOWER MOTOR (RIGHT REAR OF ENGINE COMPT) BLOWER MOTOR RESISTOR ASSEMBLY (RIGHT REAR OF ENGINE COMPT) BODY FUSE BLOCK (BELOW LEFT FRONT SEAT) BRN WIRE BRN/WHT WIRE DEFOGGER SYSTEM DK BLU WIRE DK GRN/WHT WIRE FRONT AUXILIARY HVAC CONTROL ASSEMBLY (IF EQUIPPED) GRY WIRE HOT AT ALL TIMES HOT IN HVAC 1 FUSE 9 HVAC CONTROL ASSEMBLY HVAC FUSE 10 LOGIC LT BLU WIRE LT GRN WIRE MED OFF OFF MAX NORM BI-LEV ORG/ WIRE PPL R DEFOG IND GROUND ING 3 BATTERY RED WIRE RED/BLK (OR RED) WIRE RED/WHT WIRE RR BLOWER FUSE 13 RUN WIRE TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VENT HEAT HEAT/DEF DEF VENT HEAT HEAT/DEF DEF OFF MAX NORM BI-LEV WHT WIRE YEL WIRE

A/C HIGH PRESSURE SWITCH AUXILIARY HVAC CONTROL PROCESSOR (BEHIND AUXILIARY HVAC ASSEMBLY, IN HEADLINER) BLK WIRE BLOW FUSE 51 BLOWER MOTOR (RIGHT REAR OF ENGINE COMPT) BLOWER MOTOR RESISTOR ASSEMBLY (RIGHT REAR OF ENGINE COMPT) BODY FUSE BLOCK (BELOW LEFT FRONT SEAT) BREAKOUT) BREAKOUT) (W/O RV UPFITTER OPTION: IN FRONT HEADLINER HARN, BRN WIRE BRN/WHT WIRE DEFOGGER SYSTEM DK BLU WIRE DK GRN/WHT WIRE EXCEPT RV FRONT AUXILIARY HVAC CONTROL ASSEMBLY GRY WIRE HOT AT ALL TIMES HOT IN HVAC 1 FUSE 9 HVAC CONTROL ASSEMBLY HVAC FUSE 10 LOGIC LT BLU WIRE LT GRN WIRE MED OFF OFF LO MED HI OFF MAX NORM BI-LEV ORG/ WIRE PNK/BLK WIRE PPL PPL/WHT WIRE R DEFOG IND GROUND ING 3 BATTERY REAR REAR AUXILIARY HVAC CONTROL ASSEMBLY RED WIRE RED/BLK (OR RED) WIRE RED/WHT WIRE RR BLOWER FUSE 13 RUN WIRE TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VENT HEAT HEAT/DEF DEF VENT HEAT HEAT/DEF DEF OFF MAX NORM BI-LEV WHT WIRE YEL WIRE

3-2 SHIFT SOL LOW REF BATTERY PPL PPL BLK WIRE BLK/WHT WIRE BLU WIRE BREAKOUT) BRN WIRE BRN/WHT WIRE CAMSHAFT POSITION SENSOR (PART OF DISTRIBUTOR, REAR TOP OF ENGINE) CKP SENS COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ECM-B FUSE ENG 1 FUSE ENGINE COOLANT TEMPERATURE SENSOR (ON TOP FRONT OF ENGINE) EVAP ENABLE TRANS SW B CMP SENSOR ECT SENSOR OFF/RUN/CRK INJ 5 INJ 8 GROUND EGR GND GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START INJ 1 INJ 6 INJ 4 INJ 7 INJ. #2 INJ. #3 KNOCK SENSOR (ON RIGHT SIDE OF ENGINE) KS #1 LOW REF LOW REF LOW REF LOW REF LOW REF EGR VALVE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK 35 36 37 WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (ON LEFT INNER FENDER) PPL PPL 39 40 PPL PNK WIRE PPL PPL PPL/WHT WIRE RED WIRE RED/BLK WIRE SOLID STATE TAN WIRE TAN/WHT WIRE TRANS PRES B TRANS PRES C IGN 1 BATTERY LOW REF TRANS SW A TCC BK SW TRANS SW P PPL UNDERHOOD FUSE BLOCK W/ W/ WHT WIRE YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOLENOID 2-3 SHIFT SOLENOID 3-2 SHIFT SOLENOID IGNITION 4 SPEED A/T FLUID PRESSURE MANUAL VALVE POSITION SWITCH AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE BLU WIRE BRAKE FUSE 18 BRN WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK PNK WIRE ECM 1 FUSE EXHAUST GAS RECIRCULATION VALVE (TOP FRONT OF ENGINE) FLUID TEMP SENSOR GROUND FLUID TEMP SENSOR SIGNAL FUEL INJECTORS GRN WIRE GRY WIRE HOT IN OFF, RUN OR START HOT IN RUN HOT IN RUN OR START I/P FUSE BLOCK LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT LT PNK WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK 1 2 WIRE PNK 11 12 13 14 15 16 17 18 19 WIRE PNK 24 25 26 27 28 29 30 31 32 WIRE PNK 35 36 37 WIRE PNK PNK 3 4 WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PPL 33 34 PPL 39 40 PPL PNK WIRE PPL/WHT WIRE RED WIRE RED/BLK WIRE TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC PCM SOLENOID VALVE TCC SOLENOID VLAVE PRESSURE CONTROL SOLENOID VALVE TCC/BRAKE SWITCH (BEHIND DASH, ON BRAKE PEDAL SUPPORT) TRANS FUSE 20 UNDERHOOD FUSE BLOCK WHT WIRE YEL WIRE YEL/BLK WIRE

BATTERY BLK WIRE BLK/WHT WIRE BRN WIRE CNG FUSE DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE EVAP PURGE FTP SENS FUEL CONTROL SOLENOID (FCS) FUEL CTRL SOL FUEL GAGE SW FUEL GAUGE SELECT SWITCH GROUND GRY WIRE HOT AT ALL TIMES IDLE CONTROL SOLENOID (ICS) IDLE SOL IGNITION IGNITION RELAY (CENTER REAR OF ENGINE COMPT) IN ALTERNATIVE FUELS HARNESS LOW PRESS SOL LOW PRESSURE LOCK-OFF SOLENOID LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK 1 2 WIRE PNK 11 12 13 14 15 16 17 18 19 WIRE PNK 12 13 14 15 16 17 18 19 20 WIRE PNK 24 25 26 27 28 29 30 31 32 WIRE PNK PNK 3 4 WIRE PNK WIRE PPL PPL 33 34 PPL PNK PNK WIRE PPL/WHT WIRE RED WIRE RED/BLK WIRE SENSOR GRND SERIAL GRND SERIAL POWER TAN WIRE TAN/BLK WIRE TAN/WHT WIRE UNDERHOOD FUSE BLOCK WHT WIRE YEL WIRE YEL/BLK WIRE

5 VOLT REF BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK (DASH HARN, NEAR POWER SEAT BREAKOUT) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECT SENSOR EVAP PURGE FTP SENSOR FTT SENSOR FUEL GAGE FUEL IND FUEL LVL INPUT FUEL LVL OUT FUEL RLY CTRL FUEL TANK PRESSURE SENSOR FUEL TANK TEMPERATURE SENSOR GAUGES FUSE 4 GRN WIRE GRY WIRE HOT IN RUN OR START I/P FUSE BLOCK IAT SENSOR IN ALTERNATIVE FUELS HARNESS INPUT INSTRUMENT CLUSTER LOCK-OFF RLY LT BLU/WHT WIRE LT GRN WIRE MAF SENSOR MALFUNCTION INDICATOR LAMP (MIL) "SERVICE ENGINE SOON" MANIFOLD ABSOLUTE PRESSURE SENSOR (TOP RIGHT SIDE OF ENGINE) MAP SENSOR MIL CTRL MIL INPUT NCA WIRE NGO ENABLE ORG/ WIRE ORG/BLK WIRE PNK 12 13 14 15 16 17 18 19 20 WIRE PNK 15 16 17 18 19 20 21 22 23 24 WIRE PNK 35 36 WIRE PNK PNK 4 5 6 7 WIRE PNK WIRE PPL PPL PNK PNK WIRE PPL/WHT WIRE RED WIRE RED/BLK WIRE SENSOR GRND SERIAL DATA SPEEDOMETER/ ODOMETER TACH TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TP SENSOR VEHICLE SPEED WHT WIRE YEL WIRE YEL/BLK WIRE

26 27 28 PNK WIRE BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/WHT WIRE DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE FUEL PUMP, SENDER (IN FUEL TANK UNDER REAR OF VEHICLE) FUEL TANK PRESSURE SENSOR (GAS) (IN FUEL TANK) GRN WIRE GRY WIRE INSTRUMENT CLUSTER SYSTEM LT BLU/WHT WIRE LT GRN WIRE MASS AIRFLOW SENSOR (PART OF AIR INTAKE DUCT, TOP FRONT OF ENGINE) ORG/ WIRE PARK/ NEUTRAL POSITION SWITCH PNK 15 16 17 18 19 20 21 22 23 24 WIRE PNK 35 36 WIRE PNK PNK 1 2 3 4 WIRE PNK PNK 4 5 6 7 WIRE PNK WIRE PPL/WHT WIRE RED WIRE RED/BLK WIRE SIG OUT DK TAN WIRE TAN/BLK WIRE THROTTLE POSITION SENSOR (ON SIDE OF THROTTLE BODY) UNDERHOOD FUSE BLOCK FUEL PUMP RELAY WHT WIRE YEL WIRE YEL/BLK WIRE

26 27 28 PNK WIRE A/C LOW A/C REQ A/C SYSTEM ANTI-LOCK BRAKE SYSTEM AUTOMATIC TRANSMISSION INPUT SHAFT SPEED SENSOR BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CRUISE CONTROL SYSTEM CRUISE ENG DISTRIBUTOR DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE EAVP PURGE CHARGE IND EVAP VENT MIL 2-3 SHIFT 1-2 SHIFT VSS VSS TFT SENS GEN F AFO SIG EVAPORATIVE EMISSIONS CANISTER PURGE SOLENOID VALVE (RIGHT SIDE OF ENGINE) GEN TO GRN WIRE GROUND EGR SOL TCC SOL A/C CLUTCH GRY WIRE HIGH VOLTAGE COIL WIRE IAC COIL B IAC COIL B IAC COIL A IAC COIL A IDLE AIR CONTROL VALVE (TOP LEFT SIDE OF ENGINE) IGNITION COIL (TOP RIGHT SIDE OF ENGINE) IGNITION CONTROL MODULE (TOP RIGHT SIDE OF ENGINE, AT IGNITION COIL) INTAKE AIR TEMPERATURE SENSOR (FRONT OF ENGINE COMPT, PART OF AIR INTAKE DUCT) LOW REF LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MAF SENS MAP SENS PC SOL EGR SUPP PC SOL F PMP RLY TACH PNK PNK 1 2 3 4 WIRE PNK WIRE POWERTRAIN CONTROL MODULE (ON LEFT INNER FENDER) PPL PPL FUEL LEV PPL/WHT WIRE RED WIRE RED/BLK WIRE SOLID STATE PNK WIRE STARTING/CHARGING SYSTEM TAN WIRE TAN/BLK WIRE TRANS C TRANS A PRES SENS PNK WIRE VEHICLE SPEED SENSOR (ON SIDE OF TRANSMISSION) VSS LOW VSS HI AT ISS HI AT ISS LO TP SENS IAT SENS SIG IC TIMING WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE