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

1 2 6 8 20 21 22 23 40 42 47 48 51 62 63 GND TCC PWM CTRL PC SOL HI CTRL AUTOMATIC TRANSMISSION INPUT SHAFT SPEED SENSOR BLK WIRE BLK/WHT WIRE BRN WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ENGINE COOLANT TEMPERATURE SENSOR (ON LEFT SIDE OF ENGINE) FROM UNDERHOOD PASS- THROUGH GROMMET BREAKOUT) GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN ACCY, RUN, START HOT IN RUN, START IGN 0 FUSE 6 INSTRUMENT PANEL CLUSTER LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PARK/NEUTRAL POSITION SWITCH (LEFT SIDE OF TRANSMISSION) PC SOL LO CTRL PPL FRONT LOW SIG FRONT HIGH SIG PCM BATT FUSE 2 PCM IGN 1 FUSE 38 PNK WIRE POWERTRAIN CONTROL MODULE (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL PRNDL INDICATOR RED/WHT WIRE SERIAL DATA TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TOW/ HAUL SWITCH TOW/HAUL INDICATOR TOW/HAUL SWITCH SIG UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPARTMENT) VEHICLE SPEED SENSOR WHT WIRE YEL WIRE YEL/BLK WIRE

1-2 SOL 2-3 SOL 3-2 SOL A/T FLUID PRESSURE MANUAL VALVE POSITION SWITCH AUTOMATIC TRANSMISSION BLK WIRE BLU WIRE BRN WIRE DK BLU WIRE GRY WIRE HOT IN RUN, START IGN E FUSE 22 LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PC SOL VALVE PNK WIRE PPL RED WIRE REV STOP LAMP SWITCH (ABOVE BRAKE PEDAL) TAN (OR BLK) WIRE TAN WIRE TAN/BLK WIRE TCC PWM SOL TCC SOL TFT SENSOR UNDERHOOD FUSE BLOCK UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPARTMENT) WHT WIRE YEL WIRE YEL/BLK WIRE

1 2 6 8 20 21 22 23 40 42 47 48 51 62 63 GND TCC PWM CTRL PC SOL HI CTRL AUTOMATIC TRANSMISSION INPUT SHAFT SPEED SENSOR BLK WIRE BLK/WHT WIRE BRN WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ENGINE COOLANT TEMPERATURE SENSOR (ON LEFT SIDE OF ENGINE) FROM UNDERHOOD PASS- THROUGH GROMMET BREAKOUT) GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN ACCY, RUN, START HOT IN RUN, START IGN 0 FUSE 6 INSTRUMENT PANEL CLUSTER LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PARK/NEUTRAL POSITION SWITCH (LEFT SIDE OF TRANSMISSION) PC SOL LO CTRL PPL FRONT LOW SIG FRONT HIGH SIG PCM BATT FUSE 2 PCM IGN 1 FUSE 38 PNK WIRE POWERTRAIN CONTROL MODULE (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL PRNDL INDICATOR RED/WHT WIRE SERIAL DATA TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TOW/ HAUL SWITCH TOW/HAUL INDICATOR TOW/HAUL SWITCH SIG UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPARTMENT) VEHICLE SPEED SENSOR WHT WIRE YEL WIRE YEL/BLK WIRE

1-2 SOL 2-3 SOL 3-2 SOL A/T FLUID PRESSURE MANUAL VALVE POSITION SWITCH AUTOMATIC TRANSMISSION BLK WIRE BLU WIRE BRN WIRE DK BLU WIRE GRY WIRE HOT IN RUN, START IGN E FUSE 22 LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PC SOL VALVE PNK WIRE PPL RED WIRE REV STOP LAMP SWITCH (ABOVE BRAKE PEDAL) TAN (OR BLK) WIRE TAN WIRE TAN/BLK WIRE TCC PWM SOL TCC SOL TFT SENSOR UNDERHOOD FUSE BLOCK UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPARTMENT) WHT WIRE YEL WIRE YEL/BLK WIRE

1 2 6 8 20 21 22 23 40 42 47 48 51 62 63 GND TCC PWM CTRL PC SOL HI CTRL AUTOMATIC TRANSMISSION INPUT SHAFT SPEED SENSOR BLK WIRE BLK/WHT WIRE BRN WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ENGINE COOLANT TEMPERATURE SENSOR (ON LEFT SIDE OF ENGINE) FROM UNDERHOOD PASS- THROUGH GROMMET BREAKOUT) GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN ACCY, RUN, START HOT IN RUN, START IGN 0 FUSE 6 INSTRUMENT PANEL CLUSTER LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PARK/NEUTRAL POSITION SWITCH (LEFT SIDE OF TRANSMISSION) PC SOL LO CTRL PPL FRONT LOW SIG FRONT HIGH SIG PCM BATT FUSE 2 PCM IGN 1 FUSE 38 PNK WIRE POWERTRAIN CONTROL MODULE (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL PRNDL INDICATOR RED/WHT WIRE SERIAL DATA TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TOW/ HAUL SWITCH TOW/HAUL INDICATOR TOW/HAUL SWITCH SIG UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPARTMENT) VEHICLE SPEED SENSOR WHT WIRE YEL WIRE YEL/BLK WIRE

1-2 SOL 2-3 SOL 3-2 SOL A/T FLUID PRESSURE MANUAL VALVE POSITION SWITCH AUTOMATIC TRANSMISSION BLK WIRE BLU WIRE BRN WIRE DK BLU WIRE GRY WIRE HOT IN RUN, START IGN E FUSE 22 LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PC SOL VALVE PNK WIRE PPL RED WIRE REV STOP LAMP SWITCH (ABOVE BRAKE PEDAL) TAN (OR BLK) WIRE TAN WIRE TAN/BLK WIRE TCC PWM SOL TCC SOL TFT SENSOR UNDERHOOD FUSE BLOCK UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPARTMENT) WHT WIRE YEL WIRE YEL/BLK WIRE

8 9 10 11 12 PNK WIRE A/C REQ SIG A/C SYSTEM BLK WIRE BRN WIRE CKP SENSOR SIG DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ECM/TCM GLOW PLUG CNTRL MDL IGN 1 FUSE 38 ENG 1 FUSE 23 ENGINE CONTROL MODULE (ECM) FRP SENSOR SIG FUSIBLE LINK 4 GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN ACC, RUN, START HOT IN RUN, START IGN 0 FUSE 6 IGN 1 IGN E FUSE 22 INJ 1 INJ 2 INTAKE AIR TEMPERATURE (IAT) SENSOR 2 (AT FRONT OF TURBOCHARGER) LOW REF LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE ORG/BLK WIRE PNK 22 23 24 WIRE PNK WIRE PNK/BLK WIRE PPL PPL 25 26 27 28 29 30 PPL/WHT WIRE RED WIRE RED/WHT WIRE STOPLAMP SWITCH (ABOVE BRAKE PEDAL) TAN WIRE TAN/WHT WIRE TUR VAN POS UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

8 9 10 11 12 PNK WIRE BLK WIRE BRN WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE E.C.M. FUSE 33 ECM ACT FUSE 63 ECM RELAY 62 FOH/ECM TCM BATT FUSE 2 FUEL HEATER FUEL HTR FUSE 25 FUEL INJECTORS FUEL PMP FUSE 12 FUEL PMP RELAY 57 FUEL RAIL PRESSURE (FRP) SENSOR (ON TOP RIGHT SIDE OF ENGINE) GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN, START LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE ORG/BLK WIRE PNK 22 23 24 WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PPL 20 21 PPL 25 26 27 28 29 30 PPL/WHT WIRE RED/WHT WIRE TAN WIRE TAN/WHT WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

BLK WIRE BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) BRK FUSE 11 BRN WIRE CRANKSHAFT POSITION (CKP) SENSOR (NEXT TO CRANKSHAFT PULLEY) DK BLU WIRE DK GRN WIRE FUEL PUMP (LEFT CENTER INNER FRAME RAIL) GRY WIRE GRY/BLK WIRE HIGH IDLE SWITCH HOT IN LT GRN WIRE LT GRN/BLK WIRE MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR (ATTACHED TO INTAKE MANIFOLD TUBE) NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE PPL 11 12 PPL 20 21 PPL/WHT WIRE RED WIRE RED/WHT WIRE RUN WIRE TAN WIRE TURBOCHANGER VANE POSITION SENSOR (TOP OF TURBOCHARGER) WHT/BLK WIRE YEL WIRE

1020 2500 COMPUTER DATA LINES SYSTEM 23 1786 1320 6863 STARTING/ CHARGING SYSTEM EXTERIOR LIGHTS SYSTEM 2501 2221 COMPUTER DATA LINES SYSTEM A/C SYSTEM STARTING/ CHARGING SYSTEM ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/WHT WIRE CLASS 2 SERIAL COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM RELAY ENGINE CONTROL MODULE (ECM) FUEL LEVEL SENSOR (ON LEFT FRAME RAIL) FUEL PUMP FUEL RAIL TEMPERATURE (FRT) SENSOR (TOP LEFT SIDE OF ENGINE) GENERATOR SIG PARK/NEUTRAL SIG CHMSL + LOW REF GMLAN DATA (-) HI REAR SIG GRY WIRE HOT AT ALL TIMES IND INSTRUMENT PANEL CLUSTER IPC FUSE 31 LOW REF MIL CONTROL A/C COMPRESS START ENABLE EGR MOTOR HIGH LOW REF LT BLU WIRE LT GRN/BLK WIRE MALFUNCTION INDICATOR LAMP ORG/ WIRE ORG/BLK WIRE PARK/NEUTRAL POSITION SWITCH (LEFT SIDE OF TRANSMISSION) PNK IGN 0 + GMLAN DATA (+) WIRE PNK PPL IGN 1 + TCC BRAKE SIG CHARGE IND GENERATOR 2 SIG A/C LO PRESS SW WIRE PNK WIRE PPL PPL 11 12 PPL FUEL LEV SEN SIG RED/WHT WIRE STARTING/ CHARGING SYSTEM A/C SYSTEM 7076 603 TAN WIRE TAN/WHT WIRE TRANSMISSION CONTROL MODULE (TCM) (LEFT FRONT CORNER OF ENGINE COMPT) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SIG WAIT TO WAIT TO START HI IDLE IND WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE