Chevrolet Chevy Express G1500 (1996-2012) hot in run or start Wiring diagrams

2 12 PPL DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) ABS FUSE ABS IND. BATTERY SIGNAL GROUND BLK WIRE BLK/WHT WIRE BRAKE FUSE 18 BRAKE IND BRAKE PRESSURE DIFFERENTIAL SWITCH (ON LEFT FRAME RAIL, NEAR CENTER OF VEHICLE) BRN WIRE DAYTIME RUNNING LAMP CONTROL MODULE (UNDER LEFT SIDE OF DASH) DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (ON LEFT FRAME RAIL NEAR CENTER OF VEHICLE) GAUGES FUSE 4 HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START I/P FUSE BLOCK (ON LEFT LOWER KICK PANEL) IGNITION ABS IND GROUND BRAKE SW INPUT INSTRUMENT CLUSTER LEFT FRONT WHEEL SPEED SENSOR LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE PASSLOCK MODULE (BELOW CENTER OF DASH) PNK WIRE PPL PPL PPL 1807 680 PPL SERIAL DATA PPL/WHT WIRE RED WIRE RIGHT FRONT WHEEL SPEED SENSOR SENSOR HIGH SENSOR HIGH SENSOR LOW SENSOR LOW 873 833 SERAIL DATA TAN WIRE TAN/WHT WIRE TCC/ STOPLAMP SWITCH (ON BRAKE PEDAL SUPPORT) UNDERHOOD FUSE/RELAY CENTER UNDERHOOD FUSE/RELAY CENTER (LEFT SIDE OF ENGINE COMPT) VEHICLE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (LEFT SIDE OF TRANSMISSION) VSS VSS SIG VSS SIG DIAGNOSTIC SIG SERIAL DATA BRAKE IND INPUT EBCM GROUND WARNING SYSTEMS YEL WIRE YEL/BLK WIRE

2 12 PPL DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) ABS FUSE ABS IND. BATTERY SIGNAL GROUND BLK WIRE BLK/WHT WIRE BRAKE FUSE 18 BRAKE IND BRAKE PRESSURE DIFFERENTIAL SWITCH (ON LEFT FRAME RAIL, NEAR CENTER OF VEHICLE) BRN WIRE DAYTIME RUNNING LAMP CONTROL MODULE (UNDER LEFT SIDE OF DASH) DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (ON LEFT FRAME RAIL NEAR CENTER OF VEHICLE) GAUGES FUSE 4 HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START I/P FUSE BLOCK (ON LEFT LOWER KICK PANEL) IGNITION ABS IND GROUND BRAKE SW INPUT INSTRUMENT CLUSTER LEFT FRONT WHEEL SPEED SENSOR LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE PASSLOCK MODULE (BELOW CENTER OF DASH) PNK WIRE PPL PPL PPL 1807 680 PPL SERIAL DATA PPL/WHT WIRE RED WIRE RIGHT FRONT WHEEL SPEED SENSOR SENSOR HIGH SENSOR HIGH SENSOR LOW SENSOR LOW 873 833 SERAIL DATA TAN WIRE TAN/WHT WIRE TCC/ STOPLAMP SWITCH (ON BRAKE PEDAL SUPPORT) UNDERHOOD FUSE/RELAY CENTER UNDERHOOD FUSE/RELAY CENTER (LEFT SIDE OF ENGINE COMPT) VEHICLE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (LEFT SIDE OF TRANSMISSION) VSS VSS SIG VSS SIG DIAGNOSTIC SIG SERIAL DATA BRAKE IND INPUT EBCM GROUND WARNING SYSTEMS YEL WIRE YEL/BLK 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) 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

BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE CENTER HIGH MOUNTED STOP LAMP (CHMSL) CRUISE CONTROL SYSTEM DK BLU WIRE DK DK RIGHT FRONT INNER PARK/ TURN SIGNAL LAMP DK GRN WIRE HAZ SW TN SW HAZARD HAZARD FUSE 5 HEADLAMP SWITCH HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK TURN- B/U FUSE 16 I/P RELAY CENTER (UNDER LEFT SIDE OF DASH) INSTRU- MENT PANEL CLUSTER LEFT LEFT FRONT MARKER LAMP LEFT TAIL LAMP LEFT TURN IND LT BLU WIRE LT GRN WIRE MULTI- FUNCTION SWITCH NORMAL OFF HEAD PARK ORG/ WIRE PARK LPS FUSE 9 PNK WIRE PPL RIGHT RIGHT FRONT MARKER LAMP RIGHT FRONT OUTER PARK/ TURN SIGNAL LAMP RIGHT REAR PARK/ TURN SIGNAL LAMP LEFT REAR PARK/ TURN SIGNAL LAMP RIGHT TAIL LAMP LICENSE LAMP RIGHT TURN IND STOP FUSE 1 TCC/ BRAKE SWITCH (BEHIND DASH, ON TURN PWR HAZ PWR FLSHR OUT GND TURN/HAZARD LAMP FLASHER W/ OPTIONAL TRAILER WIRING PACKAGE) 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

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 SIDE OF THROTTLE BODY) TRANS FUSE 20 UNDERHOOD FUSE BLOCK WHT WIRE YEL WIRE YEL/BLK WIRE