GMC Sierra 2500 (2000-2004) ign e fuse Wiring diagrams

59 33 (DIESEL) (GAS) ABS FUSE ANTI-LOCK IND BLK WIRE BLK/WHT WIRE BRAKE FLUID LEVEL SWITCH (ON LEFT SIDE OF BRAKE FLUID RESERVOIR) BRAKE IND BRN WIRE CLUTCH START SWITCH (TOP OF CLUTCH CLUTCH ASSY) CPP SW SIG DK GRN WIRE DK GRN/WHT WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) (ON LEFT SIDE OF INNER FRAME) EXCEPT SEO GRY WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START IGN E FUSE IGNITION INSTRUMENT CLUSTER LEFT FRONT SENSOR (-) RIGHT FRONT SENSOR (+) BRAKE INPUT LEFT FRONT WHEEL SPEED SENSOR LEFT I/P FUSE BLOCK (ON LOWER LEFT SIDE OF DASH) BRAKE FUSE LOGIC LT BLU WIRE LT GRN/BLK WIRE M/T ONLY NCA WIRE OF TRANSFER CASE) OF TRANSMISSION) PNK WIRE PPL PPL DATA LINK CONNECTOR (DLC) (BELOW STEERING COLUMN) PPL PPL PPL/WHT WIRE RED WIRE RIGHT FRONT WHEEL SPEED SENSOR SEO SEO IGN FUSE STOP- LAMP SWITCH (ON TOP OF BRAKE PEDAL BRACKET) TAN WIRE TCC BRAKE SW TRANSFER CASE SHIFT CONTROL MODULE TRANSMISSIONS SYSTEM TRANSMISSIONS SYSTEM (TRASFER CASE CIRCUIT) UNDERHOOD FUSE BLOCK (AT LEFT SIDE OF ENG COMPT, NEAR BATTERY) UNDERHOOD FUSE BLOCK (AT LEFT SIDE OF ENGINE COMPT, NEAR BATTERY) VEHICLE SPEED SENSOR (VSS) VSS HIGH VSS LOW VSS OUTPUT YEL WIRE YEL/BLK WIRE

59 33 (DIESEL) (GAS) ABS FUSE ANTI-LOCK IND BLK WIRE BLK/WHT WIRE BRAKE FLUID LEVEL SW IN BRAKE FLUID LEVEL SWITCH (ON LEFT SIDE OF BRAKE FLUID RESERVOIR) BRAKE IN BRAKE IND BRN WIRE BRN/WHT WIRE CLUTCH START SWITCH (TOP OF CLUTCH CLUTCH ASSY) DEL TORQUE DK GRN WIRE DK GRN/WHT WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) (ON LEFT SIDE OF INNER FRAME) EXCEPT SEO GRY WIRE HOT AT ALL TIMES HOT IN RUN LEFT I/P FUSE BLOCK (ON LOWER LEFT SIDE OF DASH) BRAKE FUSE HOT IN RUN OR START IGN E FUSE IGNITION LEFT FRONT SENSOR (-) RIGHT FRONT SENSOR (+) DELIVERED TORQUE ILLUM LAMP INSTRUMENT CLUSTER LEFT FRONT WHEEL SPEED SENSOR LOGIC LT BLU WIRE LT GRN/BLK WIRE M/T ONLY NCA WIRE OF TRANSFER CASE) OF TRANSMISSION) ORG/BLK WIRE PNK WIRE PPL PPL DATA LINK CONNECTOR (DLC) (BELOW STEERING COLUMN) PPL PPL PPL/WHT WIRE RED WIRE REQ TORQUE RIGHT FRONT WHEEL SPEED SENSOR SEO SEO IGN FUSE STOPLAMP SWITCH (ON TOP OF BRAKE PEDAL BRACKET) TAN WIRE TAN/BLK WIRE TCC BRAKE SW TRACTION CONTROL SWITCH TRANSFER CASE SHIFT CONTROL MODULE TRANSMISSIONS SYSTEM TRANSMISSIONS SYSTEM (TRASFER CASE CIRCUIT) UNDERHOOD FUSE BLOCK (AT LEFT SIDE OF ENG COMPT, NEAR BATTERY) UNDERHOOD FUSE BLOCK (AT LEFT SIDE OF ENGINE COMPT, NEAR BATTERY) VEHICLE SPEED SENSOR (VSS) VSS HIGH VSS LOW VSS OUT YEL WIRE YEL/BLK WIRE

5.3L W/DUAL BATTERIES AUXILIARY BATTERY RELAY (RIGHT REAR OF ENG COMPT) BATTERY BLK WIRE BLK/WHT WIRE BRN WIRE CHARGE INDICATOR CONTROL COMPUTER DATA LINES DK BLU WIRE DK GRN WIRE FUSIBLE LINK FUSIBLE LINK (8.1L ONLY) GENERATOR B+ GENERATOR FIELD DUTY CYCLE SIGNAL GROUND GRY WIRE HOT IN RUN, START I/P RELAY BLOCK (BELOW LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) IGN 1 VOLT IGN E FUSE INSTRUMENT PANEL CLUSTER IPC CLASS 2 SERIAL DATA LEFT BATTERY LOGIG PNK WIRE POWER DISTRIBUTION SYSTEM RED WIRE RIGHT BATTERY RIGHT BATTERY (W/AUX BATTERY) SEO IGN FUSE SERIAL DATA CLASS 2 SPLICE PACK STARTER SOLENOID SUPPLEMENTAL BRAKE ASSIST (SBA) PUMP MOTOR (MOUNTED TO POWER BRAKE BOOSTER) UNDERHOOD FUSE BLOCK (AT LEFT SIDE OF ENG COMPT, NEAR BATTERY) W/ SEO W/AUX BATTERY W/O SEO

ANL/ DRL BACK-UP LAMPS CIRCUIT BLK WIRE BLK/WHT WIRE BLU WIRE BLUNT CUT) BODY CONTROL MODULE (BCM) (ON LOWER LEFT SIDE OF DASH, BELOW STEERING COLUMN) BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DK LT EMERGENCY VEHICLE ROOF LAMP RELAY FRT PARK FUSE GRN WIRE GRY WIRE GRY/BLK WIRE HAZARD SWITCH HEAD PARK AUTO HEADLAMP SWITCH HOT AT ALL TIMES HOT IN RUN AND START I/P RELAY BLOCK IGN E FUSE LEFT FRONT MARKER LAMP LEFT FRONT PARK/ TURN SIGNAL LAMP LEFT RIGHT LT BLU WIRE LT GRN WIRE PARK LAMP RELAY PNK WIRE PRK LMP ON RED WIRE RIGHT FRONT MARKER LAMP RIGHT FRONT PARK/ TURN SIGNAL LAMP SERIAL DATA PRK LMP RLY STUD 1 FUSE STUD 2 FUSE TO TRL PARK FUSE TRAILER CONNECTOR TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDER- HOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT WIRE YEL WIRE

A/C COMP RELAY CTRL A/C COMPRESSOR CLUTCH A/C COMPRESSOR CLUTCH RELAY A/C FUSE A/C HIGH PRESSURE RECIRCULATION SWITCH (IN A/C MUFFLER HOSE) A/C HIGH PRESSURE SWITCH (REAR OF COMPRESSOR) A/C LOW PRESSURE SWITCH (RIGHT SIDE OF ACCUMULATOR) A/C REQUEST A/C SWITCH AIR TEMPERATURE ACTUATOR (BOTTOM CENTER OF BLK WIRE BLOWER MOTOR (UNDER RIGHT SIDE OF DASH) BLOWER MOTOR RELAY ASSEMBLY (ON HVAC MODULE, NEAR BLOWER MOTOR) BLOWER RELAY BODY RELAY BLOCK (UNDER LEFT SIDE OF DASH) BRN WIRE CTRL RECIRC DOOR DEFOGGER SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE FRT HVAC FUSE GRY WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START HTR A/C FUSE HVAC 1 FUSE HVAC CONTROL ASSEMBLY HVAC CONTROL MODULE (BEHIND CENTER OF DASH) IGN E FUSE LEFT I/P FUSE BLOCK (LOWER LEFT SIDE OF DASH) LOW OFF LT BLU WIRE MODE ACTUATOR (LEFT SIDE OF HVAC MODULE) ORG/ WIRE POWERTRAIN CONTROL MODULE (PCM) (LEFT FRONT OF ENGINE OF ENGINE COMPT) PPL PRESS SW A/C HIGH REAR DEFOG RLY IGN 3 VOL A/C REQUEST ACT POS SIG RECIRCULATION ACTUATOR (TOP OF HVAC MODULE) RED WIRE TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT, NEAR BATTERY) WHT WIRE YEL WIRE

11 11 17 17 (GASOLINE) (DIESEL) A/C COMPRESSOR CLUTCH A/C COMPRESSOR CLUTCH RELAY A/C FUSE A/C HIGH PRESS SW A/C HIGH PRESSURE RECIRCULATING SWITCH (IN A/C MUFFLER HOSE) A/C HIGH PRESSURE SWITCH (REAR OF COMPRESSOR) A/C LOW PRESSURE SWITCH (RIGHT SIDE OF ACCUMULATOR) A/C REQUEST A/C SWITCH AIR TEMPERATURE ACTUATOR (BOTTOM CENTER OF BLK WIRE BLOWER MOTOR (UNDER RIGHT SIDE OF DASH) BLOWER MOTOR RESISTOR ASSEMBLY (ON HVAC MODULE, NEAR BLOWER MOTOR) BLOWER RELAY BRN WIRE DEFOGGER SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE FRT HVAC FUSE GRY WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START HTR A/C FUSE HVAC 1 FUSE HVAC CONTROL MODULE (BEHIND CENTER OF DASH) HVAC MODULE IGN E FUSE LEFT I/P FUSE BLOCK (LOWER LEFT SIDE OF DASH) LO OFF LT BLU WIRE MODE ACTUATOR (LEFT SIDE OF HVAC MODULE) ORG/ WIRE POWERTRAIN CONTROL MODULE (PCM) (LEFT FRONT OF ENGINE COMPT) PPL REAR DEFOG RLY IGN 3 VOL A/C REQUEST ACT POS SIG RECIRC DOOR CTRL RECIRCULATION ACTUATOR (TOP OF HVAC MODULE) RED WIRE RELAY CTRL A/C COMP RIGHT I/P FUSE BLOCK (LOWER RIGHT SIDE OF DASH) TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT, NEAR BATTERY) WHT WIRE YEL WIRE

A/T BLK WIRE CLUTCH CLUTCH START SWITCH SIGN CRANK FUSE CRANK SIGN DIESEL EXCEPT DIESEL DK GRN WIRE FUSE HOLDER GRN WIRE IGN A FUSE IGN B FUSE IGN E FUSE IGNITION SWITCH LEFT BATTERY LOCK OFF M/T PARK/NEUTRAL POSITION SWITCH (ON LEFT SIDE OF TRANSMISSION) PNK PNK WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL RED WIRE RED/WHT WIRE RUN WIRE STARTER MOTOR STARTER RELAY STARTER SOLENOID STARTING/ CHARGING SYSTEM (FUSIBLE LINK) (8.1L ONLY) STARTING/ CHARGING SYSTEM (RIGHT BATTERY) (5.3L W/ DUAL BATTERIES) SWITCH (M/T) (ON TOP OF CLUTCH PEDAL BRACKET) UBDERHOOD JUNCTION BLOCK (AT LEFT SIDE OF ENG COMPT, NEAR BATTERY) UNDERHOOD FUSE BLOCK (AT LEFT SIDE OF ENG COMPT, NEAR BATTERY) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENG COMPT, NEAR BATTERY) YEL WIRE YEL/BLK WIRE

1 2 3 4 5 6 PNK WIRE 2 3 4 PPL AIR MAXI FUSE BLK WIRE BLK/WHT WIRE BRN WIRE BRN/RED WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE ECM-B FUSE ENGINE COOLANT LEVEL SWITCH (IN COOLANT RESERVOIR) ENGINE COOLANT TEMPERATURE SENSOR (LEFT FRONT OF CYLINDER HEAD) ENGINE OIL LEVEL SWITCH (RIGHT SIDE OF OIL PAN) FUEL PUMP RELAY FUEL PUMP/ LEVEL SENSOR (IN FUEL TANK) GRY WIRE HEATED OXYGEN SENSOR (BANK 1 SENSOR 1) (LEFT EXH PIPE, BEFORE CONVERTER) HEATED OXYGEN SENSOR (BANK 2 SENSOR 2) (RIGHT EXH PIPE, AFTER CONVERTER) HOT AT ALL TIMES HOT IN RUN, START IGN E FUSE KNOCK SENSOR 1 (UNDER INTAKE MANIFOLD) KNOCK SENSOR 2 (UNDER INTAKE MANIFOLD) LT BLU WIRE LT GRN WIRE NCA WIRE ORG/BLK WIRE PARK/NEUTRAL POSITION SWITCH (LEFT SIDE OF TRANSMISSION) PNK PNK WIRE PNK PPL 7 8 WIRE PNK WIRE PNK/BLK WIRE PPL PPL 5 6 PPL PNK PNK 16 17 18 WIRE PPL PPL PPL/WHT WIRE RED WIRE SECONDARY AIR INJECTION REACTION PUMP (RIGHT REAR OF ENGINE COMPT) SECONDARY AIR INJECTION REACTION RELAY (RIGHT REAR OF ENGINE COMPARTMENT) SECONDARY AIR INJECTION REACTION SOLENOID (RIGHT REAR OF ENGINE COMPT) TAN WIRE TAN/WHT WIRE UNDER- HOOD JUNCTION BLOCK WHT WIRE WHT/ BLK WIRE YEL WIRE

2 3 4 PPL AIR MAXI FUSE BLK WIRE BLK/WHT WIRE BRN WIRE BRN/RED WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE ECM-B FUSE ENGINE COOLANT LEVEL SWITCH (IN COOLANT RESERVOIR) ENGINE COOLANT TEMPERATURE SENSOR (LEFT FRONT OF CYLINDER HEAD) ENGINE OIL LEVEL SWITCH (RIGHT SIDE OF OIL PAN) FUEL PUMP RELAY FUEL PUMP/ LEVEL SENSOR (IN FUEL TANK) GRY WIRE HEATED OXYGEN SENSOR (BANK 2 SENSOR 2) (RIGHT EXH PIPE, AFTER CONVERTER) HOT AT ALL TIMES HOT IN RUN, START IGN E FUSE KNOCK SENSOR 1 (UNDER INTAKE MANIFOLD) LT BLU WIRE LT GRN WIRE NCA WIRE ORG/BLK WIRE PARK/NEUTRAL POSITION SWITCH (LEFT SIDE OF TRANSMISSION) PNK 1 2 3 4 5 WIRE PNK PNK WIRE PNK PPL 6 7 WIRE PNK WIRE PNK/BLK WIRE PPL PPL 5 6 PPL PNK PNK 16 17 18 WIRE PPL PPL PPL/WHT WIRE RED WIRE SECONDARY AIR INJECTION REACTION PUMP (RIGHT REAR OF ENGINE COMPT) SECONDARY AIR INJECTION REACTION RELAY (RIGHT REAR OF ENGINE COMPARTMENT) SECONDARY AIR INJECTION REACTION SOLENOID (RIGHT REAR OF ENGINE COMPT) TAN WIRE UNDER- HOOD JUNCTION BLOCK WHT WIRE WHT/ BLK WIRE YEL WIRE

1 2 3 PNK PNK WIRE 28 29 30 PNK WIRE 29 30 31 PNK WIRE ACCELERATOR PEDAL POSITION SENSOR ACT CNTRL AIR MAXI FUSE APP SENS APP SENS 1 APP SENS 2 APP SENS 3 APP SENSE 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 ENGINE WIRING HARNESS JUNCTION BLOCK FUSE FUSE BLOCK GROUND GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN, START IAT SENSOR IGN IGN E FUSE LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE MASS AIRFLOW SENSOR (IN AIR INTAKE DUCT) NCA WIRE ORG/BLK WIRE PNK 3 4 5 WIRE PNK WIRE PPL PPL PNK PNK 24 25 26 WIRE PPL PNK PNK WIRE PPL/WHT WIRE R/A INPUT RED WIRE RED/BLK WIRE S/C INPUT SECONDARY AIR INJECTION REACTION PUMP (RIGHT REAR OF ENGINE COMPT) SECONDARY AIR INJECTION REACTION RELAY (IN ENGINE WIRING HARNESS JUNCTION BLOCK) SENS 1 GRD SENS 1 RT SENS 2 GRD SENS 2 RT SENS 3 GRD SENS 3 RT SENS GRD SIGNAL STP LP IN TAN WIRE THROTTLE ACTUATOR CONTROL (TAC) MODULE (NEAR FRONT OF ENGINE COMPT) THROTTLE ACTUATOR CONTROL MOTOR (NEAR FRONT OF ENGINE COMPT) THROTTLE POSITION SENSOR (DUAL TRACK) (NEAR FRONT OF ENG COMPT) TP SENS 1 TP SENS 2 VEH STOP FUSE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE