Chevrolet Silverado 2500 (2000-2004) underhood fuse block Wiring diagrams

1056 1037 INTERIOR LIGHTS SYSTEM COMPUTER DATA LINES SYSTEM 2353 1382 4040 1732 230 2240 INTERIOR LIGHTS SYSTEM INTERIOR LIGHTS SYSTEM 244 255 1391 193 (BASE) (UPPER LEVEL) 710 308 COMPUTER DATA LINES SYSTEM EXTERIOR LIGHTS SYSTEM 812 1140 1969 1080 1353 ANTI-THEFT SYSTEM AMBIENT LIGHT SENSOR AMBIENT LIGHT SENSOR (TOP CENTER OF DASH) ANTI-LOCK BRAKES SYSTEM INTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM ANTI-THEFT SYSTEM HEADLIGHTS SYSTEM HORNS SYSTEM ANTI-THEFT SYSTEM SOUND SYSTEM HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (ON LOWER LEFT SIDE OF DASH, BELOW STEERING COLUMN) BRN/WHT WIRE CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PARK LAMP SW ON SIG DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DOOR LOCKS SYSTEM DOOR LOCKS SYSTEM DEFOGGER SYSTEM DOOR LOCKS SYSTEM HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM FUSE GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT AT ALL TIMES TBC BATT FUSE I/P RELAY BLOCK INTERIOR LIGHTS SYSTEM INTERIOR LIGHTS SYSTEM LEFT I/P FUSE BLOCK LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE ORG/BLK WIRE PASS DOOR LOCK SW LOCK CTRL DRIVER DOOR UNLOCK RLY CTRL REAR DEFOG RLY CTRL PASS DOOR LOCK SW UNLOCK CTRL HEADLAMP LOW BEAM RELAY CTRL FOG LIGHT RELAY CTRL PNK WIRE PNK/BLK WIRE POWER DISTRIBUTION SYSTEM PPL PPL INTERIOR LAMP DEFEAT SW SIG PPL/WHT WIRE RED WIRE RED/WHT WIRE SOLAR SENSOR SOLAR SENSOR SOUND SYSTEM STEERING CTRL SUPPLY VOLT SUNLOAD SENSOR TAN/WHT WIRE TOW/HAUL SW SIG TOW/HAUL SWITCH UNDERHOOD FUSE BLOCK UPPER LEVEL W/ AUTOMATIC A/C W/ MANUAL A/C WHT WIRE YEL WIRE

1187 1185 (UP LEVEL) (UP LEVEL) POWER WINDOWS SYSTEM POWER WINDOWS SYSTEM 2140 690 24 BATTERY + COURTESY LAMP SUPPLY VOLTAGE BACKUP LAMP SUPPLY VOLT 748 747 RIGHT REAR DOOR AJAR SW SIG LEFT REAR DOOR AJAR SW SIG BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (ON LOWER LEFT SIDE OF DASH, BELOW STEERING COLUMN) COURTESY LAMPS ON SIG DOOR UNLOCK CTRL DK BLU/WHT WIRE DK GRN WIRE FUSE GRY WIRE GRY/BLK WIRE HEADLAMP SW HEADLAMP ON SIG HEADLIGHTS SYSTEM HOT AT ALL TIMES HOT IN RUN, ACC TBC ACCY FUSE HOT IN RUN, START TBC IGN 1 FUSE HOT IN RUN, START, ACC TBC IGN 0 FUSE INTERIOR LIGHTS SYSTEM DOOR LOCKS SYSTEM (BASE) INTERIOR LIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM LEFT I/P FUSE BLOCK LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE PARK BRAKE SWITCH (PART OF PARK BRAKE ASSEMBLY) PNK 746 149 WIRE PNK WIRE POWER WINDOW SW LR DOWN SIG POWER WINDOW SW LR UP SIG UNDERHOOD FUSE BLOCK WARNINGS SYSTEM HEADLIGHTS SYSTEM WHT WIRE YEL WIRE

1382 39 INTERIOR LIGHTS SYSTEM ABS IND. AIR BAG IND BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE BODY RELAY BLOCK BODY RELAY BLOCK (UNDER LEFT SIDE) BODY WIRING RELAY BLOCK BRAKE IND BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CRUISE CONTROL MODULE CRUISE FUSE CRUISE IND DATA LINES DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DRIVER INFORMATION CENTER ENG SPD SERIAL IGN 1 ENGINE OIL PRESSURE SENSOR EXTERIOR LIGHTS SYSTEM ENGINE CONTROLS SYSTEM ENGINE CONTROLS SYSTEM (DIESEL) FUEL GAUGE GAS GND VSS OIL PRESS GRY WIRE HIGH BEAM IND HOT AT ALL TIMES UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) RADIO FUSE HOT IN HOT IN OFF, RUN OR START HOT IN RUN AND START IGN IGN 1 FUSE IGN O FUSE IGNITON 1 OFF/RUN/ ILLUM PWR ILLUMINATION INSTRUMENT CLUSTER LED DIM LEFT I/P FUSE BLOCK (ON LOWER LEFT SIDE OF DASH) LEFT TURN IND LO WASHER FLUID LOGIC LOW WASH LT BLU WIRE MESSAGE CENTER NCA WIRE NOT USED NOT USED OIL GAUGE ORG/ WIRE PARK SW PARK SWITCH (PART OF THE PARK BRAKE ASSEMBLY) PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (ON LEFT FRONT OF ENGINE COMPT) PPL/WHT WIRE RADIO RIGHT TURN IND RUN WIRE SEAT BELT IND SERVICE ENGINE SOON IND SHIFT IND SPARE SPEEDOMETER TACH OUT TACHOMETER TAN/WHT WIRE TEMP GAUGE TRANS TEMP GAUGE TRIP ODOMETER HOUR METER UNDERHOOD FUSE BLOCK VOLTS GAUGE VSS OUT WAIT TO START WASHER FLUID LEVEL SWITCH (IN WASHER FLUID RESERVOIR) WHT WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 HALL A SIG HALL B SIG SENS GND POS 2 SIG 5 VOLT REF B+ VOLT B+ VOLT SERIAL DATA BASE BASE CASE GND GND B+ VOLT BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (ON LOWER LEFT SIDE OF DASH, BELOW STEERING COLUMN) BRN WIRE CASE GROUND COMPUTER DATA LINES SYSTEM CRUISE FUSE DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE FUSE GRY WIRE HALL A SIG HALL B SIG SENS GND HALL C SIG HALL C SIG RLY VOLT SENS GND POS 1 SIG 5 VOLT REF HOT AT ALL TIMES HOT IN HOT IN RUN LEFT I/P FUSE BLOCK IGN 3 FUSE I/P RELAY BLOCK (LOWER LEFT SIDE OF DASH) INSTRUMENT CLUSTER SYSTEM LOW REF LT BLU WIRE LT GRN WIRE MEGA FUSE MODE IND CTRL LAT ACCEL SIG ORG/ WIRE PHASE A CTRL PHASE B CTRL PHASE C CTRL PNK PNK WIRE PNK WIRE POS A SIG POS B SIG POWER DISTRIBUTION SYSTEM PPL PULSE SIG REAR WHEEL POSITION SENSOR (LEFT REAR OF VEHICLE) REAR WHEEL STEERING CONTROL MODULE (NEAR SPARE TIRE BRACKET) REAR WHEEL STEERING MODE SELECT SWITCH RED WIRE RLY GND RUN WIRE SENS SIG STEERING GEAR MOTOR ASSEMBLY (NEAR SPARE TIRE BRACKET) STEERING WHEEL SPEED/ POSITION SENSOR (ON STEERING COLUMN) TAN WIRE UNDERHOOD FUSE BLOCK UNDERHOOD FUSE HOLDER VSS IGN 3 VOLT YAW SENS SIG MODE SW SIG WHT WIRE YEL WIRE

A/T SHIFT LOCK CONTROL SOLENOID (ON STEERING COLUMN) BLK WIRE BTSI FUSE DK GRN/WHT WIRE HOT IN RUN OR START B/U LPS FUSE LT GRN WIRE LT GRN/BLK WIRE MEMORY SYSTEMS NCA WIRE PARK/ NEUTRAL POSITION SWITCH (LEFT SIDE OF TRANSMISSION) PNK WIRE SPLICE PACK 203 STOPLAMP SWITCH UNDERHOOD FUSE BLOCK

BASE BATTERY SERIAL DATA GROUND BLK WIRE BLK/WHT WIRE BLU WIRE BODY RELAY BLOCK BODY RELAY BLOCK (LEFT SIDE OF DASH, NEAR KICK PANEL) BRN WIRE CRUISE FUSE DK BLU WIRE DK GRN WIRE DOOR JAMB SW IN DRIVER MINI WEDGE SWITCH DRIVER POWER WINDOW/ DOOR LOCK SWITCH EXTERIOR LIGHTS FUSE BLOCK GRY WIRE HDLMP RLY CNTRL PARK LIGHTS IN KEY IN IGN HEADLAMP SWITCH HOT AT ALL TIMES UNDERHOOD FUSE BLOCK TBC FUSE HOT IN RUN HOT IN RUN OR START HOT WITH PARK LIGHTS ON IGN 1 FUSE IGNITION KEY ALARM SWITCH INSTRUMENT CLUSTER INSTRUMENT PANEL CLUSTER (IPC) INT PRK FUSE LEFT I/P FUSE BLOCK LOGIC LT BLU WIRE LT GRN WIRE NCA WIRE ORG/ WIRE PARK BRAKE SWITCH PNK IGNITION 1 IGNITION 3 SEAT BELT INPUT PARK BRAKE SW WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (LEFT FRONT OF ENGINE COMPARTMENT) RIGHT TURN INPUT LEFT TURN INPUT GROUND SEAT BELT IND SEAT BELT SWITCH (ON DRIVER'S SEAT BELT BUCKLE) TAN WIRE TURN SIGNAL/ MULITFUNCTION SWITCH UNDERHOOD FUSE BLOCK WHT WIRE

ACT CNTRL APP SENS 1 APP SENS 2 APP SENS 3 BLK WIRE BLK/WHT WIRE BRN WIRE CRUISE CONTROL SYSTEM CRUISE REQ DATA DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ECT FUSE FUSE GROUND GRY WIRE GRY/BLK WIRE HOT IN RUN OR START HOT IN RUN, START IAT SENSOR INTAKE AIR TEMPERATURE/ MASS AIRFLOW SENSOR (IN AIR INTAKE DUCT) IGN LEFT I/P FUSE BLOCK LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE ORG/BLK WIRE PNK PNK WIRE PNK WIRE PPL PPL PNK PNK WIRE PPL/WHT WIRE R/A INPUT RED WIRE RED/BLK WIRE S/C INPUT SENS 1 GRD SENS 2 GRD SENS 3 GRD SENS GRD SIGNAL STP LP IN TAN WIRE THROTTLE POSITION SENSOR (W/ ELECTRONIC THROTTLE CONTROL) (ON THROTTLE BODY) TP SENS 1 TP SENS 2 UNDERHOOD FUSE BLOCK VEH STOP FUSE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

A/C CLU A/C REQ A/C SYSTEM A/C SYSTEM 1310 419 1223 1222 1827 ANTI-LOCK BRAKE SYSTEM ANTI-LOCK BRAKE SYSTEM (SPEED SIGNAL) AUTOMATIC TRANS- MISSION INPUT SHAFT SPEED SENSOR BLK WIRE BLK/ GRY WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CRUISE CONTROL SYSTEM CRUISE ENG CTRL DELIVERED TORQ PC SOL HI EGR CTRL PC SOL LO FUEL PMP RPM OUT RECIRC SW DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE EVAP VENT MIL CTRL 2-3 SS 1-2 SS VSS OUT VSS OUT TFT SENS SIG GEN F FUSE GEN L GRY WIRE GRY/BLK WIRE HOT IN RUN, START IAC COIL HI IAC COIL LO IAC COIL LO IAC COIL HI IDLE AIR CONTROL VALVE (TOP OF THROTTLE BODY) IGN IGN CTRL IGN CTRL IGN CTRL IGN CTRL IGN FEED GND EGR GND IGNITION COILS INSTRUMENT CLUSTER SYSTEMS (SPEED SIGNAL) INSTRUMENT PANEL CLUSTER MALFUNCTION INDICATOR LAMP LEFT I/P FUSE BLOCK LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MAF SIG MAP SIG RECIRC DOOR EVAP CANP NCA WIRE PNK PNK WIRE PNK WIRE POWERTRAIN CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) PPL PPL FUEL LEV CYC SW IN PPL PNK PNK WIRE PPL/WHT WIRE RED WIRE RED/BLK WIRE RED/WHT WIRE REF LO REF LOW REF LOW PRND C TRANS RNG A FUEL SIG CTRL RPM OUT SEC FUEL LVL SENS GND SPARK PLUG SPARK SPARK PLUG PLUG STARTING/CHARGING SYSTEM TAN WIRE TAN/BLK WIRE TP SIG IAT SIG IGN CTRL IGN CTRL IGN CTRL IGN CTRL TRANSFER CASE SHIFT CONTROL MODULE (BEHIND HEADLIGHT SWITCH) UNDERHOOD FUSE BLOCK VSS LOW VSS HIGH WHT WIRE YEL WIRE YEL/BLK WIRE

ACT CNTRL APP SENS 1 APP SENS 2 APP SENS 3 BLK WIRE BLK/WHT WIRE BRN WIRE CRUISE CONTROL SYSTEM CRUISE REQ DATA DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ECT FUSE FUSE GROUND GRY WIRE GRY/BLK WIRE HOT IN RUN OR START HOT IN RUN, START IAT SENSOR INTAKE AIR TEMPERATURE/ MASS AIRFLOW SENSOR (IN AIR INTAKE DUCT) IGN LEFT I/P FUSE BLOCK LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE ORG/BLK WIRE PNK PNK WIRE PNK WIRE PPL PPL PNK PNK WIRE PPL/WHT WIRE R/A INPUT RED WIRE RED/BLK WIRE S/C INPUT SENS 1 GRD SENS 2 GRD SENS 3 GRD SENS GRD SIGNAL STP LP IN TAN WIRE THROTTLE POSITION SENSOR (W/ ELECTRONIC THROTTLE CONTROL) (ON THROTTLE BODY) TP SENS 1 TP SENS 2 UNDERHOOD FUSE BLOCK VEH STOP FUSE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

1 2 3 4 5 6 7 PNK PNK WIRE 29 30 31 PNK WIRE A/C CLU A/C REQ A/C SYSTEM A/C SYSTEM 1310 419 1223 1222 1827 ANTI-LOCK BRAKE SYSTEM ANTI-LOCK BRAKE SYSTEM (SPEED SIGNAL) AUTOMATIC TRANS- MISSION INPUT SHAFT SPEED SENSOR BLK WIRE BLK/ GRY WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CRUISE CONTROL SYSTEM CRUISE ENG CTRL DELIVERED TORQ PC SOL HI EGR CTRL PC SOL LO FUEL PMP RPM OUT RECIRC SW DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE EVAP VENT MIL CTRL 2-3 SS 1-2 SS VSS OUT VSS OUT TFT SENS SIG GEN F FUSE GEN L GRY WIRE GRY/BLK WIRE HOT IN RUN, START IAC COIL HI IAC COIL LO IAC COIL LO IAC COIL HI IDLE AIR CONTROL VALVE (TOP OF THROTTLE BODY) IGN IGN CTRL IGN CTRL IGN CTRL IGN CTRL IGN FEED GND EGR GND IGNITION COILS INSTRUMENT CLUSTER SYSTEMS (SPEED SIGNAL) INSTRUMENT PANEL CLUSTER MALFUNCTION INDICATOR LAMP LEFT I/P FUSE BLOCK LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MAF SIG MAP SIG RECIRC DOOR EVAP CANP NCA WIRE PNK WIRE POWERTRAIN CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) PPL PPL FUEL LEV CYC SW IN PPL PNK PNK WIRE PPL/WHT WIRE RED WIRE RED/BLK WIRE RED/WHT WIRE REF LO REF LOW REF LOW PRND C TRANS RNG A FUEL SIG CTRL RPM OUT SEC FUEL LVL SENS GND SPARK PLUG SPARK SPARK PLUG PLUG STARTING/CHARGING SYSTEM TAN WIRE TAN/BLK WIRE TP SIG IAT SIG IGN CTRL IGN CTRL IGN CTRL IGN CTRL TRANSFER CASE SHIFT CONTROL MODULE (BEHIND HEADLIGHT SWITCH) UNDERHOOD FUSE BLOCK VSS LOW VSS HIGH WHT WIRE YEL WIRE YEL/BLK WIRE