Chevrolet Chevy Express G3500 (1996-2012) hot at all times Wiring diagrams

1-2 SHIFT SOL 1-2 SHIFT SOLENOID 2-3 SHIFT SOL 2-3 SHIFT SOLENOID 3-2 CTRL ONLY) SOLENOID 3-2 DOWNSHIFT SOL AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION INPUT SHAFT SPEED SENSOR BATTERY IN BLK WIRE BLK/WHT WIRE BLU/WHT WIRE BRAKE FUSE 18 BRN WIRE BRN/WHT WIRE DATA LINK CONNECTOR (PARTIAL) (UNDER LEFT SIDE OF DASH) DK BLU WIRE ECM-B FUSE ECT SENS INPUT ELECTRONIC BRAKE CONTROL MODULE ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE SENSOR (TOP FRONT OF ENGINE) FUEL INJECTORS (5.0L/5.7L) FUEL INJECTORS IGNITION COIL FUEL PUMP RELAY, FUEL PUMP SWITCH GAUGES FUSE 4 GRY WIRE HOT AT ALL TIMES HOT IN OFF, RUN OR START HOT IN RUN HOT IN RUN OR START I/P FUSE BLOCK IGNITION IN PNK IGNITION IN WIRE INSTRUMENT CLUSTER LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE MALFUNCTION INDICATOR LAMP MIL CONTROL PPL BRAKE SWITCH INPUT PPL DATA CLASS II ORG/ WIRE PCM GROUND PCS SOL LO OUT PNK PNK WIRE PNK WIRE PPL PPL HI PPL/WHT WIRE PRESS CTRL SOLENOID RANGE SIGNAL "B" PNK RANGE SIGNAL "A" WIRE RED WIRE RED/BLK WIRE SENSOR GROUND 6 7 8 11 PCS SOL HI OUT A/T ISS HI A/T ISS LO RANGE SIGNAL "C" SENSOR RETURN SWITCH ASSEMBLY TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC PWM SOL TCC PWM SOLENOID TCC SOL TCC SOLENOID TCC/ABS/ CRUISE SWITCH TCC/STOP LAMP SWITCH (ON BRAKE PEDAL SUPPORT) TP SENS INPUT TRANS FLUID TEMP SENSOR TRANS FUSE 20 TRANS RANGE PRESSURE TRANS TEMP SIG IN TWISTED WIRE PAIR UNDERHOOD FUSE/RELAY CENTER ECM-1 FUSE VEHICLE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (LEFT SIDE OF TRANSMISSION) VSS HI VSS LO WHT WIRE YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOL 1-2 SHIFT SOLENOID 2-3 SHIFT SOL 2-3 SHIFT SOLENOID A/T ISS SENS HI IN A/T ISS SENS LO IN ACCELERATOR PEDAL POSITION MODULE (BELOW DASH, ATTACHED TO ACCELERATOR PEDAL) APP 1 SIGNAL IN APP 2 SIGNAL IN APP 3 SIGNAL IN AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION INPUT SHAFT SPEED SENSOR (LEFT SIDE OF TRANSMISSION) BATTERY IN BLK WIRE BLK/WHT WIRE BRAKE FUSE 18 BRAKE SWITCH IN BRN WIRE BRN/WHT WIRE CLASS II DATA DIESEL FUEL FUSE DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE ECM-B FUSE ECT SENSOR IN ELECTRONIC BRAKE CONTROL MODULE ENGINE COOLANT TEMPERATURE SENSOR (TOP FRONT OF ENGINE) FUEL PUMP RELAY, FUEL PUMP/ OIL PRESSURE SWITCH FUEL SOLENOID DRIVER, FUEL SHUT OFF VALVE SOLENOID GAUGES FUSE 4 GROUND GRY WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK IGNITION IN INSTRUMENT CLUSTER LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE MALFUNCTION INDICATOR LAMP MIL CONTROL ORG/ WIRE PCM GROUND PCS SOL HI OUT PCS SOL LO OUT PNK PNK WIRE PNK POWER WIRE PNK WIRE POWERTRAIN CONTROL MODULE (BEHIND CENTER OF DASH) PPL PPL DATA LINK CONNECTOR (PARTIAL) (UNDER LEFT SIDE OF DASH) PPL HI PPL/WHT WIRE PRESS CTRL SOLENOID RED WIRE RED/BLK WIRE SENSOR GROUND STOP FUSE 1 STOPLAMP SWITCH IN TAN WIRE TAN/WHT WIRE TCC PWM SOL TCC PWM SOLENOID TCC/STOPLAMP SWITCH (ON BRAKE PEDAL BRACKET) TFT SENSOR IN TRANS FLUID TEMP SENSOR TRANS FUSE 20 TRANS RANGE "A" TRANS RANGE "B" TRANS RANGE "C" TRANS RANGE PRESSURE SWITCH ASSEMBLY UNDERHOOD FUSE/RELAY CENTER VEHICLE SPEED SENSOR (LEFT SIDE OF TRANSMISSION) VEHICLE SPEED SENSOR BUFFER (LEFT SIDE OF DASH) VSS HI IN VSS IN VSS LO IN VSS OUT WHT WIRE YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOL 1-2 SHIFT SOLENOID 2-3 SHIFT SOL 2-3 SHIFT SOLENOID 3-2 CTRL ONLY) SOLENOID 3-2 DOWNSHIFT SOL AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION INPUT SHAFT SPEED SENSOR BATTERY IN BLK WIRE BLK/WHT WIRE BLU/WHT WIRE BRAKE FUSE 18 BRN WIRE BRN/WHT WIRE DATA LINK CONNECTOR (PARTIAL) (UNDER LEFT SIDE OF DASH) DK BLU WIRE ECM-B FUSE ECT SENS INPUT ELECTRONIC BRAKE CONTROL MODULE ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE SENSOR (TOP FRONT OF ENGINE) FUEL INJECTORS (5.0L/5.7L) FUEL INJECTORS IGNITION COIL FUEL PUMP RELAY, FUEL PUMP SWITCH GAUGES FUSE 4 GRY WIRE HOT AT ALL TIMES HOT IN OFF, RUN OR START HOT IN RUN HOT IN RUN OR START I/P FUSE BLOCK IGNITION IN PNK IGNITION IN WIRE INSTRUMENT CLUSTER LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE MALFUNCTION INDICATOR LAMP MIL CONTROL PPL BRAKE SWITCH INPUT PPL DATA CLASS II ORG/ WIRE PCM GROUND PCS SOL LO OUT PNK PNK WIRE PNK WIRE PPL PPL HI PPL/WHT WIRE PRESS CTRL SOLENOID RANGE SIGNAL "B" PNK RANGE SIGNAL "A" WIRE RED WIRE RED/BLK WIRE SENSOR GROUND 6 7 8 11 PCS SOL HI OUT A/T ISS HI A/T ISS LO RANGE SIGNAL "C" SENSOR RETURN SWITCH ASSEMBLY TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC PWM SOL TCC PWM SOLENOID TCC SOL TCC SOLENOID TCC/ABS/ CRUISE SWITCH TCC/STOP LAMP SWITCH (ON BRAKE PEDAL SUPPORT) TP SENS INPUT TRANS FLUID TEMP SENSOR TRANS FUSE 20 TRANS RANGE PRESSURE TRANS TEMP SIG IN TWISTED WIRE PAIR UNDERHOOD FUSE/RELAY CENTER ECM-1 FUSE VEHICLE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (LEFT SIDE OF TRANSMISSION) VSS HI VSS LO WHT WIRE YEL WIRE YEL/BLK WIRE

1140 1037 812 1835 351 B+ SERIAL DATA BLK/WHT WIRE BODY CONTROL MODULE (BEHIND LOWER RIGHT SIDE OF DASH) DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) DATA SERIAL DIESEL DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (ON LEFT FRAME RAIL NEAR CENTER OF VEHICLE) ENGINE CONTROL MODULE (LEFT INNER FENDER) FUSE 46 GASOLINE GRY WIRE HOT AT ALL TIMES HOT IN RUN OR ACC HOT IN RUN OR START HOT IN RUN, ACC OR START INSTRUMENT PANEL CLUSTER LT BLU WIRE LT GRN WIRE ORG/WHT WIRE PASSLK SENS GROUND PASSLOCK SENSOR (INSIDE TOP OF STEERING COLUMN) PASSLOCK SIGNAL PNK 39 343 1020 IGN 1 VOLT ACC VOLT IGN 0 VOLT WIRE PNK WIRE POWERTRAIN CONTROL MODULE (LEFT INNER FENDER) PPL RED/WHT WIRE SECURITY INDICATOR SENS RET GROUND SENSOR RETURN SERIAL DATA TAN WIRE TBC ACCY (GAS) TBC/TCM ACCY (DIESEL) TBC FUSE 19 TBC IGN 0 FUSE 6 TBC IGN 1 FUSE 24 UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) W/ ACTIVE BRAKE CONTROL W/O ACTIVE BRAKE CONTROL YEL WIRE

6.6L 4.3L 4.8L, 5.3L, 6.0L 8 9 2500 2501 GMLAN (+) GMLAN (-) A/C CMPRSR FUSE 18 A/C COMPRSR RELAY 40 A/C LOW PRESSURE SWITCH (ON SIDE OF ACCUMULATOR) A/C REFRIGERANT PRESSURE SENSOR A/C REQUEST SIG BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) BRN WIRE COMPUTER DATA LINES SYSTEM DEF MAX A/C MIX-BLEND A/C FLOOR BI-LEV VENT LOGIC DEFOGGER, POWER MIRRORS DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) GMLAN - GMLAN + GRY WIRE HOT AT ALL TIMES HOT W/ RUN/ HVAC 2 FUSE 13 HVAC CONTROL ASSEMBLY LT GRN WIRE OFF ORG/BLK WIRE TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) W/ ELECTRIC REAR WINDOW

BASE MODELS BLK WIRE CONVENIENCE CENTER (LEFT SIDE OF DASH) DOOR JAMB SWITCH HARN BREAKOUT) DOOR JAMB SWITCH HARNESS BREAKOUT) GROUND GRY WIRE HOT AT ALL TIMES I/P FUSE BLOCK (LEFT SIDE OF DASH, LEFT DOOR LOCK SWITCH LEFT FRONT DOOR LOCK ACTUATOR LOCK LOCK SIG UNLOCK SIG LT BLU WIRE ORG/ WIRE POWER DOOR LOCK CONTROL MODULE (LEFT KICK PANEL) POWER DOOR LOCK RELAY (BEHIND RIGHT CENTER OF DASH) PWR ACCY FUSE A REAR DOOR LOCK ACTUATOR REAR DOOR LOCK SWITCH RIGHT BODY HARNESS RIGHT DOOR LOCK SWITCH RIGHT FRONT DOOR LOCK ACTUATOR SIDE DOOR CONTACTOR (RIGHT "B" PILLAR) SIDE DOOR JAMB SWITCH SIDE DOOR LOCK ACTUATOR SIDE DOOR SW BATTERY (B+) LOCK SIG TAN WIRE UNLOCK UPFITTER PACKAGE UPFITTER PACKAGE BASE MODELS WHT WIRE WHT/BLK WIRE

BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE CENTER HIGH MOUNTED STOP LAMP (CHMSL) CRUISE CONTROL SYSTEM DK BLU WIRE 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 PARK/TURN SIGNAL LAMP LEFT FRONT SIDE 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 SIDE MARKER LAMP RIGHT FRONT 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

BLK WIRE BRAKE IND CTRL BRAKE PSI IN DRL RELAY CTRL BULB TEST LOCK OFF DAYTIME RUNNING LAMPS MODULE (UNDER LEFT SIDE OF I/P, TAPED TO I/P HARNESS) DAYTIME RUNNING LAMPS RELAY (UNDER LEFT SIDE OF I/P, ON CONVENIENCE CENTER) DRL DIODE MODULE DRL FUSE 15 DRL INDICATOR FROM 36-PIN LEFT BULKHEAD CONN) BREAKOUT) LT GAUGES FUSE 4 GRN WIRE GROUND HEAD HEADLAMP DIMMER SWITCH HEADLAMP SWITCH HIGH BEAM INDICATOR HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK (LEFT KICK PANEL) IGNITION SWITCH INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM LEFT FORWARD LAMP BREAKOUT TOWARD RIGHT) LEFT FORWARD LAMP BREAKOUT) LEFT HIGH BEAM HEADLAMP LAMP LEFT LOW BEAM HEADLAMP LAMP RIGHT LOW BEAM HEADLAMP LAMP LIGHTING MAXI FUSE LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE LT PPL OFF PARK ORG/ WIRE PARK BRAKE IN IGN KEY STATUS PARK BRAKE WARNING SWITCH (ON PARK BRAKE) PNK IGN (RUN/ST) LAMP FEED WIRE PNK WIRE PPL RED WIRE RIGHT HIGH BEAM HEADLAMP LAMP RUN WIRE TAN WIRE TAN/WHT WIRE UNDERHOOD FUSE-RELAY CENTER (ENGINE COMPT, LEFT FENDER) WHT WIRE YEL WIRE

BLK WIRE BRAKE IND CTRL BRAKE PSI IN DRL RELAY CTRL BULB TEST LOCK OFF DAYTIME RUNNING LAMPS MODULE (UNDER LEFT SIDE OF I/P, TAPED TO I/P HARNESS) DAYTIME RUNNING LAMPS RELAY (UNDER LEFT SIDE OF I/P, ON CONVENIENCE CENTER) DRL DIODE MODULE DRL FUSE 15 DRL INDICATOR FROM 36-PIN LEFT BULKHEAD CONN) BREAKOUT) LT GAUGES FUSE 4 GRN WIRE GROUND HEAD HEADLAMP DIMMER SWITCH HEADLAMP SWITCH HIGH BEAM INDICATOR HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK (LEFT KICK PANEL) IGNITION SWITCH INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM LEFT FORWARD LAMP BREAKOUT TOWARD RIGHT) LEFT FORWARD LAMP BREAKOUT) LEFT HEADLAMP LIGHTING MAXI FUSE LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE LT PPL OFF PARK ORG/ WIRE PARK BRAKE IN IGN KEY STATUS PARK BRAKE WARNING SWITCH (ON PARK BRAKE) PNK IGN (RUN/ST) LAMP FEED WIRE PNK WIRE PPL RED WIRE RIGHT HEADLAMP RUN WIRE TAN WIRE TAN/WHT WIRE UNDERHOOD FUSE-RELAY CENTER (ENGINE COMPT, LEFT FENDER) WHT WIRE YEL WIRE

195 156 LOCK OUT DOME LAMPS 39 157 1455 PNK IGNITION DOME LMP OFF PROGRAM SIG WIRE BASE MODELS UPFITTER PACKAGE BATT (B+) BATT (B+) RR DOOR UNLK PASS DRS UNLK BLK WIRE BLK/WHT WIRE CONVENIENCE CENTER (LEFT SIDE OF DASH) DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) DOOR JAMB SWITCH HARNESS BREAKOUT) DRIVER DR UNLK UNLOCK IN GAUGES FUSE 4 GROUND GRY WIRE HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK (LEFT SIDE OF DASH) PWR ACCY FUSE A LEFT DOOR LOCK SWITCH LEFT FRONT DOOR LOCK ACTUATOR LOCK LOCK SIG UNLOCK SIG LT BLU WIRE ORG/ WIRE PNK WIRE POWER DOOR LOCK CONTROL MODULE (LEFT KICK PANEL) POWER DOOR LOCK RELAY (BEHIND RIGHT CENTER OF DASH) REAR DOOR LOCK ACTUATOR REMOTE CONTROL DOOR LOCK RECEIVER (UPPER RIGHT KICK PANEL) RIGHT BODY HARNESS RIGHT DOOR LOCK SWITCH RIGHT FRONT DOOR LOCK ACTUATOR RIGHT REAR DOOR LOCK SWITCH SIDE DOOR CONTACTOR (RIGHT "B" PILLAR) SIDE DOOR JAMB SWITCH SIDE DOOR LOCK ACTUATOR SIDE DOOR SW BATTERY (B+) LOCK SIG SWITCH BREAKOUT) (W/ PASSENGER POWER SEAT ONLY) TAN WIRE UNLOCK UPFITTER PACKAGE BASE MODELS WHT WIRE WHT/BLK WIRE