Chevrolet Chevy Express G3500 (1996-2012) lt blu Wiring diagrams

4.8L 6.0L 5.3L AIR BAG FUSE 34 AUTOMATIC TRANSMISSION BLK WIRE BODY CONTROL MODULE (BCM) BREAKOUT FOR REAR FUSE BLOCK) BRK SW FUSE 32 BRN WIRE CONNECTOR DK BLU WIRE DOME FLUORESCENT WORK LAMPS FUSE 2 ECM IGN FUSE 48 ELECTRONIC BRAKE CONTROL MODULE (EBCM) ENGINE CONTROL MODULE (ECM) ENGINE CONTROL MODULE (EDM) EXCEPT 4.3L 4.3L FLUORESCENT WORK LAMP RELAY FROM MEGA FUSE 77 (DIAGRAM 2 OF 4) FSCM IGN FUSE 11 FUEL PUMP FLOW CONTROL MODULE FUEL PUMP FLOW CONTROL MODULE (5.3L) HARNESS, 15 CM FROM REAR FUSE BLOCK) HARNESS, 7 CM FROM HARNESS, 8 CM FROM REAR FUSE BLOCK) IGNITION SWITCH INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) INSTRUMENT PANEL CLUSTER (IPC) IP CLSTR FUSE 30 KEY-IN SWITCH LEFT FRONT ACCESS PANEL RELAY 5 LEFT REAR ACCESS PANEL RELAY 1 LT BLU WIRE OFF ORG/ WIRE PANEL ACTUATOR FUSE 3 PNK WIRE REAR FUSE BLOCK (ON LEFT "B" PILLAR) RED WIRE RED/ WHT WIRE RED/BLK WIRE RIGHT ACCESS PANEL RELAY 6 RUN WIRE RUN/CRNK RELAY 69 STEERING WHEEL SPEED/ POSITION SENSOR STOP LAMP SWITCH STR/WHL SNSR FUSE 36 (W/ ACTIVE CONTROL BRAKE) TCM IGN FUSE 47 THEFT DETERRENT MODULE (TDM) TO BODY FUSE BLOCK (DIAGRAM 4 OF 4) TRANS FUSE 51 TRANSMISSION CONTROL MODULE (TCM) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) W/ CARGO W/ POWER BRAKE W/ ACTIVE BRAKE CONTROL W/O RV UPFITTER, MANUAL W/ MANUAL SUPPRESSION SUPPRESSION WHT RED/ WIRE WHT WIRE YEL 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

4.8L 6.0L 5.3L AIR BAG FUSE 34 AUTOMATIC TRANSMISSION BLK WIRE BODY CONTROL MODULE (BCM) BREAKOUT FOR REAR FUSE BLOCK) BRK SW FUSE 32 BRN WIRE CONNECTOR DK BLU WIRE DOME FLUORESCENT WORK LAMPS FUSE 2 ECM IGN FUSE 48 ELECTRONIC BRAKE CONTROL MODULE (EBCM) ENGINE CONTROL MODULE (ECM) ENGINE CONTROL MODULE (EDM) EXCEPT 4.3L 4.3L FLUORESCENT WORK LAMP RELAY FROM MEGA FUSE 77 (DIAGRAM 2 OF 4) FSCM IGN FUSE 11 FUEL PUMP FLOW CONTROL MODULE FUEL PUMP FLOW CONTROL MODULE (5.3L) HARNESS, 15 CM FROM REAR FUSE BLOCK) HARNESS, 7 CM FROM HARNESS, 8 CM FROM REAR FUSE BLOCK) IGNITION SWITCH INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) INSTRUMENT PANEL CLUSTER (IPC) IP CLSTR FUSE 30 KEY-IN SWITCH LEFT FRONT ACCESS PANEL RELAY 5 LEFT REAR ACCESS PANEL RELAY 1 LT BLU WIRE OFF ORG/ WIRE PANEL ACTUATOR FUSE 3 PNK WIRE REAR FUSE BLOCK (ON LEFT "B" PILLAR) RED WIRE RED/ WHT WIRE RED/BLK WIRE RIGHT ACCESS PANEL RELAY 6 RUN WIRE RUN/CRNK RELAY 69 STEERING WHEEL SPEED/ POSITION SENSOR STOP LAMP SWITCH STR/WHL SNSR FUSE 36 (W/ ACTIVE CONTROL BRAKE) TCM IGN FUSE 47 THEFT DETERRENT MODULE (TDM) TO BODY FUSE BLOCK (DIAGRAM 4 OF 4) TRANS FUSE 51 TRANSMISSION CONTROL MODULE (TCM) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) W/ CARGO W/ POWER BRAKE W/ ACTIVE BRAKE CONTROL W/O RV UPFITTER, MANUAL W/ MANUAL SUPPRESSION SUPPRESSION WHT RED/ WIRE WHT WIRE YEL 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

AUTOMATIC TRANSMISSION BLK WIRE BODY CONTROL MODULE (BCM) BRK SW FUSE 32 BRN WIRE CONNECTOR COOLANT HEATER DK BLU WIRE ECM IGN AIR BAG FUSE 48 FUSE 34 ELECTRONIC BRAKE CONTROL MODULE (EBCM) ENGINE CONTROL MODULE (EDM) FROM MEGA FUSE 77 (DIAGRAM 2 OF 4) GLOW PLUG CONTROL MODULE (GPCM) IGNITION SWITCH INFLATABLE RESTRAINT I/P MODULE DISABLE SWITCH INFLATABLE RESTRAINT I/P MODULE INDICATOR KEY-IN SWITCH LT BLU WIRE OFF PNK WIRE RUN WIRE RUN/CRNK RELAY 69 STEERING WHEEL SPEED/ POSITION SENSOR STOP LAMP SWITCH STR/WHL SNSR FUSE 36 (W/ ACTIVE CONTROL BRAKE) TCM IGN IP CLSTR FUSE 47 FUSE 30 THEFT DETERENT MODULE (TDM) TO BODY FUSE BLOCK (DIAGRAM 4 OF 4) TRANS FUSE 51 TRANSMISSION CONTROL MODULE (TCM) TRANSMISSION INSTRUMENT CONTROL PANEL MODULE CLUSTER (TCM) (IPC) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) W/ AUXILIARY HEATER W/ MANUAL SUPPRESSION W/O AUXILIARY HEATER W/O RV UPFITTER, MANUAL SUPPRESSION WHT RED/ WIRE WHT WIRE YEL WIRE

19 16 15 ALARM ENABLE SIG HAZARD SW SIG HAZARD SW SIG 2 1 3 5 B+ B+ B+ RF TURN SIG LP CTRL 2 1 RR TURN SIG LP CTRL LR TURN SIG LP CTRL 5 6 4 STOP LAMPS CTRL BRAKE SIG LF TURN SIG LP CTRL AUX PRK LAMP FUSE 3 BCM 6 FUSE 72 BLK WIRE BLK/WHT WIRE BLU WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BODY FUSE BLOCK BRN WIRE CARGO/ PASSENGER CENTER HIGH MOUNTED STOP LAMP (CHMSL) CHMSL CTRL CUTAWAY DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DRIVER OUTSIDE REARVIEW FRT PRK LAMP FUSE 4 FUSE 26 FUSE 7 GROUND DISTRIBUTION SYSTEM HAZARD SWITCH HOT AT ALL TIMES UNDER- HOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) LEFT LEFT TAIL/STOP, TURN SIGNAL LAMP LICENSE LAMP LT BLU WIRE LT BLU/WHT WIRE LT REAR PARK LAMP FUSE 8 MEGA FUSE MIRROR (IN DRIVER DOOR) MIRROR (IN RIGHT FRONT PASSENGER DOOR) NCA WIRE PARK LAMP CTRL PARK LAMPS SIG PASSENGER OUTSIDE REARVIEW PRK LAMP RELAY PROVISIONAL RED WIRE RED/WHT WIRE RIGHT RIGHT TAIL/STOP, TURN SIGNAL LAMP RT REAR PRK LAMP FUSE 7 SPLICE SUPPLEMENTAL RESTRAINTS SYSTEM TAN WIRE TRAILER TOW CIRCUIT TRLR PRK LAMP FUSE 5 TURN SIGNAL/ MULTI-FUNCTION SWITCH UPFTR PARK LAMP FUSE 6 W/ AMBULANCE, RECREATIONAL VEHICLE SALES PACKAGE W/ FOLDING MIRRORS RADIO BREAKOUT) W/O REAR WINDOW DEFOGGER WHT WIRE YEL WIRE

4 SPEED A/T 6 SPEED A/T AUTOMATIC TRANSMISSION AUX STOP LAMP FUSE 68 BLK WIRE BLK/WHT WIRE BREAKOUT TOWARDS INSTRUMENT PANEL CLUSTER) BREAKOUT) BRK SW FUSE 13 BRN WIRE COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY CUTAWAY DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) EXCEPT 4.3L 4.3L HEAD PARK AUTO HEADLAMP, PANEL DIMMER HOT AT ALL TIMES HOT W/ RUN/CRANK RELAY 15 ENERGIZED IGN INSTRUMENT PANEL CLUSTER (IPC) IPC FUSE 10 LEFT FRONT MARKER LAMP LEFT PARK/ TURN SIGNAL LAMP LEFT TURN IND LOGIC LT BLU WIRE LT BLU/WHT WIRE OFF PNK WIRE PROVISIONAL RIGHT RIGHT PARK/ FRONT TURN MARKER SIGNAL LAMP LAMP RIGHT TURN IND SER DATA STOP LAMP SWITCH (BEHIND LEFT SIDE OF DASH, ABOVE BRAKE PEDAL) STOP LAMPS PCB RELAY SWITCH TRANSMISSION CONTROL MODULE (TCM) UNDERHOOD FUSE BLOCK UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT WIRE YEL WIRE

1 2 3 4 BATTERY B+ SERIAL DATA BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) CARGO DR UNLCK FUSE 33 CARGO DR UNLCK PCB RELAY CHIME MODULE (BEHIND LEFT CENTER OF DASH) COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DRV DR UNLCK FUSE 36 DRVR DR UNLCK PCB RELAY FRT DR LCK FUSE 31 FRT PASS DR UNLCK FUSE 34 FRT REAR PASS DR UNLCK PCB FTR REAR DR LCK PCB GROUND GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT AT ALL TIMES BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) LEFT REAR SIDE DOOR JAM SWITCH (W/ HINGED DOOR) (AT LEFT "B" PILLAR) LIFTGATE AJAR SW SIG LO SPD GMLAN SERIAL DATA LO SPD SERIAL DATA LT BLU WIRE LT GRN WIRE ORG/BLK WIRE PNK/BLK WIRE RADIO REAR DR LCK FUSE 32 REAR OPEN SW REAR PASS DR UNLCK FUSE 35 RED/WHT WIRE REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR) (BEHIND CENTER OF DASH) RFA/TPM FUSE 21 RIGHT REAR SIDE DOOR JAM SWITCH (W/ CARGO PASSENGER) (AT RIGHT "B" PILLAR) TAN WIRE TAN/BLK WIRE TAN/WHT WIRE W/ COMMERCIAL TRADESMAN W/ HINGED DOOR W/O COMMERCIAL TRADESMAN YEL WIRE YEL/BLK WIRE

BLK WIRE BLK/WHT WIRE BREAKOUT) CARGO DOOR LATCH ASSEMBLY (W/ CARGO/PASSENGER) (IN RIGHT REAR CARGO DOOR) CARGO DOOR LOCK SWITCH CARGO/ PASSENGER CLASS 2 COMPUTER DATA LINES SYSTEM CUTAWAY DK BLU WIRE DK GRN WIRE DRIVER DOOR LATCH ASSEMBLY (AT REAR OF DRIVER DOOR) DRIVER DOOR LOCK SWITCH DRIVER INFORMATION CENTER (DIC) GRY WIRE GRY/BLK WIRE INSTRUMENT PANEL CLUSTER (IPC) LEFT SIDE DOOR CONTACT PLATE (AT LEFT "B" PILLAR) LOGIC LT BLU WIRE LT GRN WIRE ORG/BLK WIRE PASSENGER DOOR LATCH ASSEMBLY (AT REAR OF FRONT PASSENGER DOOR) PASSENGER DOOR LOCK SWITCH PNK/BLK WIRE RIGHT SIDE DOOR CONTACT PLATE (AT RIGHT "B" PILLAR) SECURITY INDICATOR TAN WIRE TAN/BLK WIRE TAN/WHT WIRE W/ HINGED DOOR W/ HINGED DOORS

1745 1746 844 877 2705 INJ 2 CTRL INJ 3 CTRL INJ 4 CTRL INJ 7 CTRL 2199 469 LOW REF LOW REF 23 1174 STARTING/CHARGING SYSTEM CEN FIELD SIG OIL SW SIG LOW REF LOW REF 486 6265 485 6266 PPL TP SENS 2 SIG CMP SENS SIG TP SENS 1 SIG LOW REF 6271 6272 CKP SENS SIG LOW REF BANK 1 SENSOR 1 (IN EXHAUST PIPE, IN FRONT OF CATALYTIC CONVERTER) BANK 2 SENSOR 1 (IN EXHAUST PIPE, IN FRONT OF CATALYTIC CONVERTER) BLK WIRE BLK/WHT WIRE BRN WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE (ECT) SENSOR (AT LEFT FRONT OF ENGINE) ENGINE OIL LEVEL (EOL) SWITCH (ON RIGHT SIDE OF OIL PAN) GEN ON SIG GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HEATED OXYGEN INJ 1 CTRL ECT SENS SIG LOW REF KS 1 SIG KS 1 SIG KS 2 SIG KS 2 SIG LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MAP SENS SIG PPL ORG/ WIRE ORG/BLK WIRE PNK 5 6 WIRE PNK 7 8 9 10 11 12 13 14 WIRE PNK WIRE PNK/BLK WIRE PPL PPL INTAKE SOL INJ 8 CTRL INJ 5 CTRL INJ 6 CTRL PPL/WHT WIRE PRE SENS SIG SOL CTRL STARTING/ CHARGING SYSTEM TAC MTR CTRL 2 TAC MTR CTRL 1 TAN WIRE TAN/WHT WIRE WHT GRY/ WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE