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

1-2 SHIFT SOL 1-2 SHIFT SOLENOID 2-3 SHIFT SOL 2-3 SHIFT SOLENOID 3-2 CTRL SOLENOID 3-2 DOWNSHIFT SOL A/T FLUID PRESSURE MANUAL VALVE POSITION SWITCH AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION INPUT SHAFT SPEED SENSOR BATTERY IN BLK WIRE BLK/WHT WIRE BRAKE FUSE 18 BRN WIRE BRN/WHT WIRE CRUISE CONTROL MODULE DATA LINK CONNECTOR (PARTIAL) (UNDER LEFT SIDE OF DASH) DK BLU WIRE DK BLU/WHT WIRE ECM-B FUSE ECT SENS INPUT ELECTRONIC BRAKE CONTROL MODULE ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE SENSOR (TOP FRONT OF ENGINE) FUEL INJECTORS (4.3L, 5.0L, 5.7L) 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 COIL, FUEL INJECTORS 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 PPL PPL/WHT WIRE PRESS CTRL SOLENOID RANGE SIGNAL "B" PNK RANGE SIGNAL "A" WIRE RED WIRE RED/BLK WIRE SENSOR GROUND SENSOR RETURN 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) THROTTLE POSITION SENSOR (ON THROTTLE BODY) TP SENS INPUT TRANS FLUID TEMP SENSOR TRANS FUSE 20 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 3-2 CTRL SOLENOID 3-2 DOWNSHIFT SOL A/T FLUID PRESSURE MANUAL VALVE POSITION SWITCH AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION INPUT SHAFT SPEED SENSOR BATTERY IN BLK WIRE BLK/WHT WIRE BRAKE FUSE 18 BRN WIRE BRN/WHT WIRE CRUISE CONTROL MODULE DATA LINK CONNECTOR (PARTIAL) (UNDER LEFT SIDE OF DASH) DK BLU WIRE DK BLU/WHT WIRE ECM-B FUSE ECT SENS INPUT ELECTRONIC BRAKE CONTROL MODULE ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE SENSOR (TOP FRONT OF ENGINE) FUEL INJECTORS (4.3L, 5.0L, 5.7L) 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 COIL, FUEL INJECTORS 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 PPL PPL/WHT WIRE PRESS CTRL SOLENOID RANGE SIGNAL "B" PNK RANGE SIGNAL "A" WIRE RED WIRE RED/BLK WIRE SENSOR GROUND SENSOR RETURN 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) THROTTLE POSITION SENSOR (ON THROTTLE BODY) TP SENS INPUT TRANS FLUID TEMP SENSOR TRANS FUSE 20 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 3-2 CTRL SOLENOID 3-2 DOWNSHIFT SOL A/T FLUID PRESSURE MANUAL VALVE POSITION SWITCH AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION INPUT SHAFT SPEED SENSOR BATTERY IN BLK WIRE BLK/WHT WIRE BRAKE FUSE 18 BRN WIRE BRN/WHT WIRE CRUISE CONTROL MODULE DATA LINK CONNECTOR (PARTIAL) (UNDER LEFT SIDE OF DASH) DK BLU WIRE DK BLU/WHT WIRE ECM-B FUSE ECT SENS INPUT ELECTRONIC BRAKE CONTROL MODULE ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE SENSOR (TOP FRONT OF ENGINE) FUEL INJECTORS (4.3L, 5.0L, 5.7L) 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 COIL, FUEL INJECTORS 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 PPL PPL/WHT WIRE PRESS CTRL SOLENOID RANGE SIGNAL "B" PNK RANGE SIGNAL "A" WIRE RED WIRE RED/BLK WIRE SENSOR GROUND SENSOR RETURN 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) THROTTLE POSITION SENSOR (ON THROTTLE BODY) TP SENS INPUT TRANS FLUID TEMP SENSOR TRANS FUSE 20 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

27 28 2501 2500 44 43 COMPUTER DATA LINES SYSTEM DATA BUS (-) DATA BUS (+) 4.3L 4.3L/5.3L 4.8L/6.0L BATTERY BATTERY CURRENT SENSOR (4.3L/5.3L) BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BRN WIRE CHARGE IND COMPUTER DATA LINES SYSTEM CURRENT SENSOR SIG DK GRN WIRE DRIVER INFORMATION CENTER (DIC) ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) EXCEPT 4.3L FUSIBLE LINK 3 GENERATOR GENERATOR FIELD DUTY CYCLE SIG GENERATOR TURN ON SIG GMLAN SERIAL DATA GRY WIRE HOT W/ RUN/CRANK RELAY ENERGIZED IGN VOLT INSTRUMENT PANEL CLUSTER (IPC) IP CLSTR FUSE 10 LOGIC LOW REF LOW SPEED GMLAN SERIAL DATA PNK WIRE ORG/ WIRE PNK WIRE POWER DISTRIBUTION SYSTEM RED WIRE SENS SIG STARTING CIRCUIT TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT WIRE

BLK WIRE BRN WIRE CONVENIENCE CENTER (UNDER LEFT SIDE OF DASH) DRIVER OUTSIDE REAR- VIEW MIRROR FIXED GLASS FIXED GLASS MOVING GLASS FLEX CIRCUIT HEATED MIRROR PUSHBUTTON HOT AT ALL TIMES HOT IN HTD MIR FUSE 2 HTR A/C FUSE 12 HVAC CONTROL ASSEMBLY I/P FUSE BLOCK (ON LEFT LOWER KICK PANEL) RR DEFOG FUSE 22 LATCH FLEX CIRCUIT LATCH) LEFT REAR WINDOW DEFOGGER GRID MOVING GLASS ORG/ WIRE PASSEN- GER OUTSIDE REAR- VIEW MIRROR) PPL PPL (IN LEFT BODY HARNESS, APPROX 12 CM (5 IN) FROM CENTER DOME LAMP) PPL (OR BLK) WIRE PPL LATCH FLEX CIRCUIT REAR WINDOW DEFOGGER RELAY (ON BOTTOM OF LEFT "B" PILLAR) RIGHT REAR WINDOW DEFOGGER GRID RIGHT REAR WINDOW DEFOGGER GRID RUN WIRE SOLID STATE TIMER

ASH TRAY LAMP BATTERY IGNITION DR JAMB SW GROUND DOME LAMP BLK WIRE BRIGHT ADJUST BRN WIRE CENTER DOME, READING LAMP CON- VENIENCE CENTER CTSY FUSE 3 DK GRN WIRE DOME LAMP DOME SWITCH DOOR LOCK CONTROL MODULE (ON LEFT KICK PANEL) DRIVER DOOR LOCK SWITCH DRIVER WINDOW SWITCH FRONT DOME, READING LAMP FRONT PASSENGER WINDOW SWITCH FRONT PASENGER DOOR LOCK SWITCH GAUGES FUSE 4 GRY WIRE HEADLAMP SWITCH HOT AT ALL TIMES HOT IN RUN, START I/P COMPART- MENT LAMP I/P FUSE BLOCK IGNITION DR JAMB SW BATTERY GROUND INTERIOR LAMP CONTROL MODULE (ON RIGHT LOWER KICK PANEL) JAMB SWITCH W/ RKE LAMP LEFT FRONT DOOR JAMB SWITCH LEFT FRONT STEPWELL LAMP RIGHT SIDE STEPWELL LAMP LEFT VANITY MIRROR LAMP NCA WIRE ORG/ WIRE PARADE MODE SWITCH PARK LPS FUSE 9 PARK SWITCH PNK 157 540 150 156 WIRE PNK W/ RKE WIRE PNK W/O RKE WIRE PNK WIRE PPL PWR ACCY FUSE A READING LAMPS REAR DOME/ READING LAMP REAR DOOR) RIGHT FRONT DOOR JAMB SWITCH RIGHT FRONT STEPWELL LAMP RIGHT VANITY MIRROR LAMP SIDE DOOR JAMB SWITCH TO I/P FUSE BLOCK (DIAGRAM 2 OF 2) W/ POWER DOOR LOCKS W/O POWER DOOR LOCKS W/ RKE W/ RKE DOME LAMP OVERRIDE SWITCH W/ RKE W/O RKE W/O RKE W/O RKE PPL WHT WIRE

150 150 GROUND GROUND AUXILIARY BLOWER MOTOR SWITCH AUXILIARY HEAT BLK WIRE DIESEL DK GRN WIRE FOG LAMP SWITCH FROM HEADLAMP SWITCH FRONT AUXILIARY HVAC CONTROL ASSEMBLY GAME BOX (SLT, LT) GARAGE DOOR OPENER (SLT, LT) GASOLINE GASOLINE DIESEL GROUND GRY WIRE HOT AT ALL TIMES UNDERHOOD FUSE BLOCK HORN FUSE HOT IN ACCY, RUN RADIO-I FUSE 17 HOT IN OFF, RUN, START I/P FUSE BLOCK TRANS FUSE 20 HVAC CONTROL ASSEMBLY I/P FUSE BLOCK ILLUM FUSE 14 INSTRUMENT CLUSTER NCA WIRE ODOMETER ORG/ WIRE PASSENGER PNK FROM HEADLAMP SWITCH WIRE PPL PPL PNK WIRE PPL/WHT WIRE PRNDL RADIO REAR AUXILIARY HVAC CONTROL ASSEMBLY RSA CONTROL (SLT, LT) RSA-T MODULE (SLT, LT MODELS) TAN WIRE UNDER- HOOD LAMP WHT WIRE YEL WIRE

AIR BAG FUSE 28 BLK WIRE BODY CONTROL MODULE (BCM) BREAKOUT FOR REAR FUSE BLOCK) BRK SW IPC FUSE 10 FUSE 13 BRN WIRE CONNECTOR DK BLU WIRE DOME FLUORESCENT WORK LAMPS FUSE 2 FLUORESCENT WORK LAMP RELAY FROM BODY FUSE BLOCK (DIAGRAM 4 OF 5) FROM MEGA FUSE (DIAGRAM 2 OF 5) FSCM IGN FUSE 6 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) IGN IGNITION SWITCH INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) INSTRUMENT PANEL CLUSTER (IPC) KEY-IN SWITCH LEFT FRONT ACCESS PANEL RELAY 5 LEFT REAR ACCESS PANEL RELAY 1 OFF ORG/ WIRE PANEL ACTUATOR FUSE 3 PNK WIRE REAR FUSE BLOCK (ON LEFT "B" PILLAR) RED WIRE RED/ WHT WIRE RED/BLK WIRE RED/WHT WIRE RIGHT ACCESS PANEL RELAY 6 RUN WIRE RUN/CRNK RELAY 15 STEERING WHEEL SPEED/ POSITION SENSOR STOP LAMP SWITCH STR/WHL SNSR FUSE 29 (W/ ACTIVE BRAKE CONTROL) THEFT DETERRENT MODULE (TDM) TO TRANS FUSE 17 (DIAGRAM 5 OF 5) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) W/ CARGO LAMP W/O RV UPFITTER, MANUAL W/ MANUAL SUPPRESSION SUPPRESSION WHT WIRE YEL WIRE

195 156 LOCK OUT DOME LAMPS 39 157 1455 PNK IGNITION DOME LMP OFF PROGRAM SIG WIRE BASE MODELS BATT (B+) BATT (B+) RR DOOR UNLK PASS DRS UNLK BLK WIRE BLK/WHT WIRE CONVENIENCE CENTER (UNDER 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 (ON LEFT LOWER KICK PANEL) 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 (ON LEFT KICK PANEL) POWER DOOR LOCK RELAY (BEHIND CENTER OF DASH) REAR DOOR LOCK ACTUATOR REMOTE CONTROL DOOR LOCK RECEIVER (BEHIND CENTER OF DASH) 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 UPFITTER PACKAGE BASE MODELS WHT WIRE WHT/BLK WIRE

BASE MODELS BASE MODELS UPFITTER PACKAGE BLK WIRE CONVENIENCE CENTER (UNDER 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 (ON LOWER LEFT KICK PANEL) LEFT DOOR LOCK SWITCH LEFT FRONT DOOR LOCK ACTUATOR LOCK LOCK SIG UNLOCK SIG LT BLU WIRE ORG/ WIRE POWER DOOR LOCK CONTROL MODULE (ON LEFT KICK PANEL) POWER DOOR LOCK RELAY (BEHIND CENTER OF DASH) PWR ACCY FUSE A REAR DOOR LOCK ACTUATOR REAR DOOR LOCK SWITCH 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