Chevrolet Chevy Express G1500 (1996-2012) org/ Wiring diagrams

A/C COMPRESSOR CLUTCH COIL A/C COMPRESSOR CLUTCH RELAY (IN UNDERHOOD FUSE/RELAY CENTER) A/C COMPRESSOR HIGH PRESSURE CUTOFF SWITCH (REAR OF A/C COMPRESSOR) A/C COMPRESSOR LOW PRESSURE CUTOFF SWITCH (DIESEL) (IN REFRIGERANT LINE) A/C COMPRESSOR LOW PRESSURE CUTOFF SWITCH (GASOLINE) (IN REFRIGERANT LINE) A/C FUSE AUXILIARY BLOWER MOTOR AUXILIARY BLOWER MOTOR RESISTOR (LEFT REAR OF CABIN, BEHIND REAR WHEELHOUSE) BLK WIRE BLOWER FUSE BLOWER MOTOR BLOWER MOTOR RESISTOR/RELAY (AT HVAC CONTROL PANEL) BRN WIRE COMPT AT LEFT FENDER) POWERTRAIN CONTROL MODULE (BEHIND (DIESEL) CENTER OF DASH) CONVENIENCE CENTER DIODE (IN UNDERHOOD FUSE/RELAY CENTER) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GASOLINE GASOLINE DIESEL GRY WIRE HEATER AND A/C CONTROLLER HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START HTR A/C FUSE 12 I/P FUSE BLOCK LT BLU WIRE LT GRN WIRE OFF LO MED HI OFF MAX A/C BI-LEV ORG/ WIRE PNK WIRE PPL REAR AUXILIARY HVAC CONTROL MODULE REAR AUXILIARY MODE VALVE AND SEAL ASSY (LEFT REAR INTERIOR) REAR AUXILIARY TEMPERATURE VALVE ASSY (LEFT REAR INTERIOR) RED WIRE RR BLOWER FUSE RR HVAC FUSE 24 TAN WIRE TEMP UNDER HOOD FUSE-RELAY CENTER UNDER- HOOD FUSE/ RELAY CENTER IGN E FUSE VEHICLE CONTROL MODULE (IN ENGINE VENT HEAT BLEND DEF VENT HEAT BLEND DEF OFF MAX A/C BI-LEV VENT MODE WHT WIRE YEL WIRE

A/C COMPRESSOR CLUTCH COIL A/C COMPRESSOR CLUTCH RELAY (IN UNDERHOOD FUSE/RELAY CENTER) A/C COMPRESSOR HIGH PRESSURE CUTOFF SWITCH (REAR OF A/C COMPRESSOR) A/C COMPRESSOR LOW PRESSURE CUTOFF SWITCH (DIESEL) (IN REFRIGERANT LINE) A/C COMPRESSOR LOW PRESSURE CUTOFF SWITCH (GASOLINE) (IN REFRIGERANT LINE) AUXILIARY BLOWER MOTOR AUXILIARY BLOWER MOTOR RESISTOR (LEFT REAR OF CABIN, BEHIND REAR WHEELHOUSE) BLK WIRE BLOWER FUSE BLOWER MOTOR BLOWER MOTOR RESISTOR/RELAY (AT HVAC CONTROL PANEL) BRN WIRE COMPT AT LEFT FENDER) POWERTRAIN CONTROL MODULE (BEHIND (DIESEL) CENTER OF DASH) CONVENIENCE CENTER DIODE (IN UNDERHOOD FUSE/RELAY CENTER) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE FRONT AUXILIARY HVAC CONTROL MODULE GASOLINE GASOLINE DIESEL GRY WIRE HEATER AND A/C CONTROL LOGIC MODULE (FRONT INTERIOR ROOF PANEL) HEATER AND A/C CONTROLLER HOT AT ALL TIMES HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN HTR A/C FUSE 12 I/P FUSE BLOCK LT BLU WIRE LT GRN WIRE OFF LO MED HI OFF MAX A/C BI-LEV ORG/ WIRE PNK WIRE PPL REAR AUXILIARY HVAC CONTROL MODULE REAR AUXILIARY MODE VALVE AND SEAL ASSY (LEFT REAR INTERIOR) REAR AUXILIARY TEMPERATURE VALVE ASSY (LEFT REAR INTERIOR) RED WIRE RR BLOWER FUSE RR CTRL OFF LO MED HI RR HVAC FUSE 24 TAN WIRE TEMP UNDER HOOD FUSE-RELAY CENTER UNDER- HOOD FUSE/ RELAY CENTER A/C FUSE IGN E FUSE VEHICLE CONTROL MODULE (IN ENGINE VENT HEAT BLEND DEF VENT HEAT BLEND DEF OFF MAX A/C BI-LEV VENT MODE WHT WIRE YEL WIRE

3 2 PPL 5.0L, 5.7L GAS 4.3L, 8.1L GAS 6.5L DIESEL 8.1L ABS SERIAL DATA BLK WIRE BLK/WHT WIRE CONVENIENCE CENTER (UNDER LEFT SIDE OF DASH) DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) HOT AT ALL TIMES I/P FUSE BLOCK INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (UNDER LEFT FRONT SEAT) ORG/ WIRE PASSLOCK MODULE (BELOW CENTER OF DASH) POWERTRAIN CONTROL MODULE (PCM) (BEHIND CENTER OF DASH) PPL PPL 4.3L, 6.5L DIESEL ONLY PPL 5.0L, 5.7L GAS ONLY PPL SERIAL DATA PROG SIGNAL PWR AUX FUSE 7 RADIO REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR) (BEHIND CENTER OF DASH) SERIAL DATA TAN/WHT WIRE

BLK WIRE BRN WIRE CONVENIENCE CENTER (UNDER LEFT SIDE OF DASH) HEATED MIRROR SWITCH HEATER, A/C CONTROLLER HOT AT ALL TIMES HOT IN HTD MIR FUSE 2 HTR A/C FUSE 12 I/P FUSE BLOCK (ON LEFT LOWER KICK PANEL) LEFT POWER OUTSIDE REAR VIEW MIRROR ORG/ WIRE RIGHT POWER OUTSIDE REAR VIEW MIRROR RUN WIRE SOLID STATE TIMER W/ UPFITTER PROVISIONS ONLY

2501 2500 2501 2500 COMPUTER DATA LINES SYSTEM AIR TEMPERATURE ACTUATOR (BEHIND RIGHT SIDE OF DASH, ON HVAC) AUXILIARY BLOWER MOTOR (IF EQUIPPED) AUXILIARY BLOWER MOTOR LOW SPEED RELAY (IF EQUIPPED) (LEFT REAR OF PASSENGER AUXILIARY BLOWER MOTOR MEDIUM SPEED RELAY AUXILIARY BLOWER MOTOR RESISTOR ASSEMBLY (IF EQUIPPED) AUXILIARY BLOWER MOTOR SWITCH (IF EQUIPPED) BLK WIRE BLOWER MOTOR (ON RIGHT REAR OF ENGINE COMPT, ON EVAPORATOR CASE) BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) BREAKOUT) BRN WIRE BRN/WHT WIRE COMPT, ATTACHED TO AUXILIARY HVAC MODULE) CONNECTOR BREAKOUT) COOLANT HEATER BLOWER MOTOR GND COOLANT HEATER COMBUSTION SENSOR LOW REF COOLANT HEATER CONTROL MODULE COOLANT HEATER GLOW PLUG VOLT DK BLU WIRE DK BLU/LT GRN WIRE FOH MDL (D) FUSE 35 FROM AUXILIARY BLOWER MOTOR BREAKOUT) GND SERIAL - SERIAL + SERIAL - SERIAL + GRN/RED WIRE HOT AT ALL TIMES HOT W/ RUN/ HVAC 1 FUSE 14 HVAC 2 FUSE 13 HVAC CONTROL ASSEMBLY LOGIC 8 10 7 LT BLU WIRE MAX A/C OFF A/C BI-LEV MED LO OFF OF ENGINE BLOCK) ORG/ WIRE REAR BLWR FUSE 29 RED WIRE RED/BLK WIRE RED/WHT WIRE REF SER DATA TAN WIRE TAN/BLK WIRE VACUUM PUMP (6.6L) (RIGHT FRONT OF ENGINE COMPT, UNDER BATTERY) VENT FLOOR MIX-BLEND DEF VOLT W/ AUXILIARY FUEL FIRED HEATER W/O AUXILIARY FUEL FIRED HEATER WHT WIRE YEL WIRE

3-2 SHIFT SOL LOW REF 9 10 11 PPL BATTERY PPL BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CAMSHAFT POSITION SENSOR (PART OF DISTRIBUTOR, REAR TOP OF ENGINE) CKP SENS DK BLU WIRE ECM-B FUSE ENG 1 FUSE ENGINE COOLANT TEMPERATURE SENSOR (ON TOP FRONT OF ENGINE) GROUND EGR GND GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START INJ 1 INJ 3 INJ 4 INJ 5 KS SIG 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 PNK 20 21 22 23 24 25 WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (ON LEFT INNER FENDER) PPL PPL PNK WIRE PPL PPL PPL/WHT WIRE RED 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 TRANS SW B CMP SENSOR ECT SENSOR OFF/RUN/CRK INJ 2 INJ 6 UNDERHOOD FUSE BLOCK WHT WIRE YEL WIRE YEL/BLK WIRE

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PNK WIRE 2-3 SHIFT SOLENOID 1-2 SHIFT SOLENOID 3-2 SHIFT SOLENOID A/T FLUID PRESSURE MANUAL VALVE POSITION SWITCH 4-SPEED TRANS. ONLY 9 10 11 PPL AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE BLU WIRE BRAKE FUSE 18 BRN WIRE DK BLU WIRE ECM 1 FUSE EXHAUST GAS RECIRCULATION VALVE (TOP FRONT OF ENGINE) FLUID TEMP SENSOR GROUND FLUID TEMP SENSOR SIGNAL IGNITION PRESSURE CONTROL SOLENOID VALVE FUEL INJ 1 FUEL INJ 2 FUEL INJ 3 FUEL INJ 4 FUEL INJ 5 FUEL INJ 6 GRN WIRE GRY WIRE 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 PNK WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK LT WIRE PNK PNK 20 21 22 23 24 25 WIRE PNK PNK PNK WIRE PNK PNK WIRE PNK PPL WIRE PNK WIRE PNK/BLK WIRE PPL RED WIRE RED/BLK WIRE TAN WIRE TAN/BLK WIRE TCC PCM SOLENOID VALVE TCC SOLENOID VLAVE TCC/BRAKE SWITCH (BEHIND DASH, ON BRAKE PEDAL SUPPORT) TRANS.) UNDERHOOD FUSE BLOCK WHT WIRE YEL WIRE YEL/BLK WIRE

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PNK WIRE 21 22 PPL 24 25 26 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 LVL INPUT FUEL PUMP RELAY FUEL PUMP, SENDER (IN FUEL TANK UNDER REAR OF VEHICLE) SIG OUT SIG IN FUEL TANK PRESSURE SENSOR (IN FUEL TANK) GAUGES FUSE 4 GRN WIRE GRY WIRE HOT AT ALL TIMES UNDERHOOD FUSE BLOCK AIR FUSE HOT IN OFF, RUN OR START HOT IN RUN OR START I/P FUSE BLOCK INPUT INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM LT BLU/WHT WIRE LT GRN WIRE MALFUNCTION INDICATOR LAMP (MIL) "SERVICE ENGINE SOON" MANIFOLD ABSOLUTE PRESSURE SENSOR (TOP RIGHT SIDE OF ENGINE) MASS AIRFLOW SENSOR (PART OF AIR INTAKE DUCT, TOP FRONT OF ENGINE) ODOMETER SPEEDOMETER/ ORG/ WIRE ORG/BLK WIRE PARK/ NEUTRAL POSITION SWITCH PNK PNK WIRE PNK WIRE PPL PPL SECONDARY AIR INJECTION REACTION SOLENOID RED WIRE RED/BLK WIRE SECONDARY AIR INJECTION REACTION PUMP CLUTCH SECONDARY AIR INJECTION REACTION PUMP RELAY TAN WIRE TAN/BLK WIRE THROTTLE POSITION SENSOR (ON LEFT SIDE OF THROTTLE BODY) TRANS FUSE 20 UNDERHOOD FUSE BLOCK WHT WIRE YEL WIRE YEL/BLK WIRE

10 11 12 PPL 3-2 SHIFT SOL LOW REF BATTERY PPL PPL BLK WIRE BLK/WHT WIRE BLU WIRE 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 ECM-B FUSE ENG 1 FUSE ENGINE COOLANT TEMPERATURE SENSOR (ON TOP FRONT OF ENGINE) 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 PNK WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (ON LEFT INNER FENDER) PPL 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 TRANS SW B CMP SENSOR ECT SENSOR OFF/RUN/CRK INJ 5 INJ 8 UNDERHOOD FUSE BLOCK W/ W/ WHT WIRE YEL WIRE YEL/BLK WIRE

10 11 12 PPL 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PNK WIRE 2-3 SHIFT SOLENOID 1-2 SHIFT SOLENOID 3-2 SHIFT SOLENOID A/T FLUID PRESSURE MANUAL VALVE POSITION SWITCH 4-SPEED TRANS. ONLY AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE BLU WIRE BRAKE FUSE 18 BRN WIRE DK BLU WIRE DK BLU/WHT WIRE ECM 1 FUSE EXHAUST GAS RECIRCULATION VALVE (TOP FRONT OF ENGINE) FLUID TEMP SENSOR GROUND FLUID TEMP SENSOR SIGNAL IGNITION FUEL INJ 1 FUEL INJ 2 FUEL INJ 3 FUEL INJ 4 FUEL INJ 5 FUEL INJ 6 FUEL INJ 7 FUEL INJ 8 GRN WIRE GRY WIRE 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 PNK WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK LT WIRE PNK PNK WIRE PNK PPL WIRE PNK WIRE PNK/BLK WIRE PPL PRESSURE CONTROL SOLENOID VALVE RED WIRE RED/BLK WIRE TAN WIRE TAN/BLK WIRE TCC PCM SOLENOID VALVE TCC SOLENOID VLAVE TCC/BRAKE SWITCH (BEHIND DASH, ON BRAKE PEDAL SUPPORT) TRANS.) UNDERHOOD FUSE BLOCK WHT WIRE YEL WIRE YEL/BLK WIRE