GMC Sierra 2500 (2000-2004) blk Wiring diagrams

BLK WIRE BODY CONTROL MODULE (ON LOWER LEFT SIDE OF DASH, BELOW STEERING COLUMN) BRN WIRE CARGO LAMP CARGO LAMP SWITCH CARGO LP SW DOME LP SW DR HANDLE SW LT DOOR JAMB DOME LP DFT COURTESY LAMP RELAY CTSY LP FUSE CTSY LP RLY RT DOOR JAMB LAMP REQUEST DK BLU WIRE DK BLU/WHT WIRE DOME LAMP DOME LAMP DEFEAT SWITCH DOME LAMP SWITCH ENGINE WIRING HARNESS JUNCTION BLOCK (ON LEFT SIDE OF ENGINE COMPT) FUSE BLOCK (ON LOWER LEFT SIDE OF DASH) GRY WIRE GRY/BLK WIRE HEADLAMP, PANEL DIMMER SWITCH HOT AT ALL TIMES I/P COMPART- MENT LAMP I/P WIRING HARNESS JUNCTION BLOCK (ON LOWER RIGHT SIDE OF DASH) INADVERT RLY INADVERTENT POWER RELAY LEFT FRONT DOOR COURTESY LAMP LEFT I/P COURTESY LAMP LEFT MINI WEDGE (DOOR JAMB SWITCH) LEFT POWER WINDOW/DOOR LOCK SWITCH LT GRN WIRE LT GRN/BLK WIRE OFF ORG/ WIRE PPL READING LAMPS RIGHT FRONT DOOR COURTESY LAMP RIGHT I/P COURTESY LAMP RIGHT MINI WEDGE (DOOR JAMB SWITCH) TAN WIRE UNDERHOOD LAMP ASSEMBLY WHT WIRE

4-DOOR 2-DOOR B/U LPS FUSE BACK BLK WIRE BODY WIRING HARNESS JUNCTION BLOCK BRN WIRE BTSI FUSE DRIVER POWER SEAT SWITCH ENGINE WIRING HARNESS JUNCTION BLOCK FORWARD/ REARWARD MOTOR FRONT TILT MOTOR FRT DN FRT UP FUSE BLOCK HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START IGN IGN 3 FUSE LEFT POWER WINDOW/ DOOR LOCK SWITCH LT GRN WIRE LT GRN/BLK WIRE MEMORY SEAT MODULE (UNDERSIDE OF DRIVER'S SEAT) MEMORY SEAT SWITCH MIR/LOCK FUSE NCA WIRE ORG/ WIRE PARK SW IN PARK/ NEUTRAL POSITION SWITCH (LEFT SIDE OF TRANSMISSION) PNK WIRE PPL RCL 1 RCL 1 SW RCL 2 RCL 2 SW RCL BACK RCL FWD REAR DN REAR TILT MOTOR REAR UP RECLINER MOTOR SEATS CIRCUIT BREAKER SET SW SET- SHIFT INTERLOCK SYSTEM WHT WIRE

10 12 PNK WIRE 16 5 PNK WIRE AIR TEMP SENSOR AMBIENT PHOTO SENSOR BACK UP LAMP VOLTAGE OUTPUT BACK UP VOLTAGE BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (ON LOWER LEFT SIDE OF DASH, BELOW STEERING COLUMN) BODY RELAY BLOCK COMPASS COMPUTER DATA LINES SYSTEM DK GRN/WHT WIRE DRIVER DOOR MODULE (DDM) (IN DRIVER'S DOOR) DRIVER OUTSIDE REARVIEW MIRROR ELECTROCHROMIC MIRROR GROUND GRY WIRE HOT IN RUN, START IGN 1 INSIDE REARVIEW MIRROR LEFT I/P FUSE BLOCK (LOWER LEFT SIDE OF DASH) LOW REF LOW REF MIR SIGNAL LT GRN WIRE NCA WIRE OUTSIDE AIR TEMPERATURE SENSOR PNK WIRE RR LIGHT PHOTO SENSOR SELECTOR SWITCH SERIAL DATA SIR FUSE TEMP UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) YEL WIRE

ASHTRAY LAMP AUTOMATIC TRANSFER CASE SELECT SWITCH BASE BLK WIRE BLUNT CUT) BODY CONTROL MODULE (ON LOWER LEFT SIDE OF DASH, BELOW STEERING COLUMN) BRN WIRE DIM IN DK GRN WIRE DRIVER HEATED SEAT SWITCH ENGINE WIRING HARNESS JUNCTION BLOCK (ON LEFT SIDE OF ENGINE COMPT) FOG/ CARGO LAMP SWITCH FUSE BLOCK (ON LOWER LEFT SIDE OF DASH) FUSE BLOCK (ON LOWER LEFT SIDE OF DASH) ILLUM FUSE GRN WIRE GRY WIRE HEAD HEADLAMP, PANEL DIMMER SWITCH HOT AT ALL TIMES PARK LPS FUSE HVAC CONTROL MODULE/ BLOWER CONTROL SWITCH I/P DIM I/P WIRING HARNESS JUNCTION BLOCK (ON LOWER RIGHT SIDE OF DASH) INFLATABLE RESTRAINT I/P MODULE SWITCH INSTRUMENT CLUSTER INT PRK FUSE LEFT POWER DOOR LOCK SWITCH LEFT POWER WINDOW SWITCH LEFT POWER WINDOW/ DOOR LOCK SWITCH LT BLU WIRE NCA WIRE ORG/ WIRE PARK AUTO PARK LP RLY PARADE MODE PARK LP SIG PARKLAMP RELAY POWER MIRROR SWITCH PPL PPL/WHT WIRE RADIO PPL/ RIGHT HEATED SEAT SWITCH RIGHT POWER DOOR LOCK SWITCH RIGHT POWER WINDOW SWITCH RIGHT POWER WINDOW/DOOR LOCK SWITCH ROOF BEACON SWITCH SELECT- ABLE RIDE SWITCH TRACTION ASSIST SWITCH UP LEVEL BASE WHT WIRE

A/C FUSE A/C RELAY ABS FUSE ACCESSORY POWER OUTLET AIR FUSE AUDIO AMPLIFIER AUTOMATIC TRANSMISSION CONTROL MODULE (ALLISON) BATTERY CABLE JUNCTION BLOCK BLK WIRE BODY CONTROL MODULE BODY RELAY BLOCK (UNDER LEFT SIDE OF DASH) CIGAR LIGHTER CTSY LP FUSE DATA LINK CONNECTOR (DLC) DIESEL ONLY DK GRN WIRE DK USED DRL FUSE EARLY SIERRA PRO ECM-B FUSE ELECTRONIC BRAKE CONTROL MODULE (EBCM) ENGINE CONTROL MODULE (ECM) POWERTRAIN CONTROL MODULE (PCM) EXTERIOR ILLUM LAMPS RELAY FOG LPS FUSE FOGLAMP RELAY FROM AIR FUSE (DIAGRAM 1 OF 4) FROM FUSE BLOCK (DIAGRAM 4 OF 4) FROM RAP FUSE (DIAGRAM 1 OF 4) PARK LAMPS FUSE FRONT BLOWER MOTOR RESISTOR ASSEMBLY FRONT PASSENGER WINDOW/DOOR LOCK SWITCH FRT HVAC FUSE FUEL PUMP RELAY FUSIBLE LINK GRN WIRE HAZARD FUSE HEADLAMP DAYTIME RELAY RUNNING LAMP (DRL) RELAY HEADLAMP DIMMER SWITCH HEADLAMP ROOF SWITCH BEACON RELAY HEADLAMP SWITCH HORN RELAY HVAC CONTROL MODULE INADVERTENT POWER RELAY INSTRUMENT DRIVER PANEL INFOR- CLUSTER MATION (IPC) CENTER (DIC) INTERIOR LIGHT SUSTEM LATE LEFT BATTERY LEFT GENERATOR LEFT I/P FUSE BLOCK LUXURY NCA WIRE ORG/ WIRE PARKLAMP RELAY PASSENGER DRIVER SEAT SEAT PWR WDO CB POWER TAKEOFF (PTO) RELAY RADIO RADIO FUSE RAP 1 FUSE RAP 2 FUSE RAP 2 RELAY RDO AMP FUSE REAR DEFOGGER RELAY REAR WHEEL STEERING CONTROL MODULE RED WIRE REMOTE CONTROL DOOR LOCK RECEIVER RIGHT GENERATOR (W/ DUAL GENERATOR) RIGHT REAR WINDOW SWITCH ROOF THERMO BEACON CUPHOLDER SWITCH ASSEMBLY SEO 1 FUSE SEO 2 FUSE SIERRA DENALI STARTER SOLENOID STOP LPS FUSE ATC FUSE STOPLAMP TRANSFER SWITCH CASE SHIFT MODULE TBC FUSE TO ECM B FUSE (DIAGRAM 1 OF 4) TO FUSE BLOCK (MIR/LOCK FUSE) (DIAGRAM 4 OF 4) TO FUSIBLE LINK (DIAGRAM 3 OF 4) TO IGN 1 RELAY (DIAGRAM 3 OF 4) TO IGN A FUSE (DIAGRAM 2 OF 4) AUX PWR FUSE CIGAR FUSE TO PARK LAMPS FUSE (DIAGRAM 1 OF 4) TRANSFER CASE ENCODER MOTOR TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDER- HOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE UNDER- HOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT)

A/C DRL RELAY RELAY AIR BAG FUSE SEO IGN FUSE AUTOMATIC TRANSMISSION (W/O ALLISON) TRANSMISSION CONTROL MODULE (W/ ALLISON) AUXILARY POWER OUTLET B/U LP FUSE IGN E FUSE BLK WIRE BODY CONTROL MODULE BODY RELAY BLOCK (UNDER LEFT SIDE OF DASH) BRN WIRE BULB TEST CAMSHAFT PARK/ POSITION NEUTRAL (CMP) POSITION SENSOR SWITCH (A/T) (4.3L) CRANK FUSE IGN O FUSE CRUISE CONTROL ON/OFF SWITCH EVAPORATIVE EMISSION (EVAP) CANISTER PURGE SOLENOID EXT LPS FUSE FROM CIGAR FUSE (DIAGRAM 1 OF 4) FUEL HEATER HEATED (DIESEL) OXYGEN SENSOR GAS ONLY GLOW PLUG CONTROLLER (DIESEL) GRN WIRE I/P LEFT FUSE BLOCK (ON LOWER LEFT SIDE OF DASH) IGN A FUSE IGN B FUSE IGN C FUSE IGNITION SWITCH INSIDE INSTRUMENT REARVIEW PANEL MIRROR CLUSTER (IPC) INSIDE TEMPERATURE SENSOR PNK ASSEMBLY WIRE INSTRUMENT INSTRUMENT PANEL PANEL CLUSTER CLUSTER (IPC) (IPC) LT GRN WIRE LT PNK WIRE NCA WIRE OFF OFF BULB TEST ORG/ WIRE PNK PNK (CANADA BUILT) (OTHERS) WIRE PNK PNK PNK (CANADA BUILT) (OTHERS) (CANADA BUILT) (OTHERS) WIRE PNK PNK PNK PNK WIRE PNK PNK PNK WIRE PNK PNK PPL/ PNK (GAS) (DIESEL) WIRE PNK PNK WIRE PNK WIRE PRO REAR DEFOG RELAY RED WIRE RED/WHT WIRE RR HVAC FUSE RR WPR FUSE RTD FUSE RUN WIRE SELECTABLE BATTERY RIDE MONITOR SWITCH SIERRA SPLICE PACK PNK WIRE STARTER RELAY STUD 1 FUSE STUD 1 STUD 2 STUD 2 FUSE SWITCH (M/T) TO HTR/ A/C FUSE (DIAGRAM 3 OF 4) TO IGN 1 RELAY (DIAGRAM 3 OF 4) TO IGN 1 RELAY (DIAGRAM 3 OF 4) ENG 1 FUSE TO RETAINED ACCESSORY POWER RELAY (DIAGRAM 4 OF 4) RR WIPER FUSE TRACTION DRIVER ASSIST INFORMATION SWITCH CENTER (DIC) TRAILER TRAILER CONNECTOR WIRING TRANS CONTROL MODULE TRANSFER CASE SHIFT CONTROL SWITCH TURN FUSE IGN 1 FUSE TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDER- HOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) W/ ALLISON WHT WIRE WINDSHIELD CRUISE WIPER CONTROL MOTOR MODULE MODULE WINDSHIELD WASHER SWITCH WS WIPER FUSE SEO ACCY FUSE CRUISE FUSE YEL WIRE

44 19 (DIESEL) (GAS) AIR TEMPERATURE ACTUATOR ALL OTHER GAS 4.3L ALL OTHER GAS 4.3L FUEL INJECTOR PNK PNK CONTROL MODULE WIRE AUXILIARY BATTERY RELAY BASE BLK WIRE BRAKE FUSE BRN WIRE DIESEL DIESEL GAS DIESEL GAS BLOWER MOTOR SWITCH (MANUAL) ECM PRV FUSE (DIESEL) ENGINE CONTROL MODULE (ECM)/ PNK PNK POWERTRAIN CONTROL MODULE (PCM) WIRE ETC FUSE FROM CRUISE FUSE (DIAGRAM 2 OF 4) FROM ENG 1 FUSE (DIAGRAM 2 OF 4) FROM ECM B FUSE (DIAGRAM 1 OF 4) FROM FUSE LINK (DIAGRAM 1 OF 4) FROM IGN C FUSE (DIAGRAM 2 OF 4) FRONT AXLE ACTUATOR FRONT PASSENGER HEATED SEAT SWITCH FUEL FUEL FUEL INJECTOR 4 INJECTOR 2 INJECTOR 8 FUEL INJECTOR 1 FUEL INJECTOR 3 FUEL INJECTOR 5 FUEL INJECTOR 6 FUEL INJECTOR 7 FUSE GAS HTR A/C FUSE HVAC 1 FUSE HVAC CONTROL MODULE IGN 1 RELAY IGN 3 FUSE IGNITION COIL 1 IGNITION COIL 3 IGNITION COIL 5 IGNITION IGNITION COIL 2 COIL 4 IGNITION IGNITION COIL COIL 7 IGNITION IGNITION IGNITION COIL 8 COIL 6 COIL MODULE INJ A FUSE INJ B FUSE MEGA FUSE MEMORY DRIVER SEAT HEATED MODULE SEAT SWITCH UPLEVEL MODE ACTUATOR NCA WIRE PNK PNK PNK WIRE PNK PNK WIRE PNK WIRE REAR REAR WHEEL WHEEL STEERING STEERING SWITCH CONTROL MODULE RECIRCULATION ACTUATOR RECIRCULATION AIR MODE ACTUATOR TEMPERATURE ACTUATOR ACTUATOR RED WIRE RIGHT BATTERY RIGHT BATTERY FUSIBLE LINK RIGHT I/P FUSE BLOCK (ON LOWER RIGHT SIDE OF DASH) STOPLAMP ELECTRONIC SWITCH BRAKE CONTROL MODULE (EBCM) THROTTLE ACTUATOR CONTROL MODULE TRANSFER CASE SHIFT CONTROL MODULE UNDER- HOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT)

BASE BLK WIRE BODY CONTROL MODULE (BCM) BODY RELAY BLOCK (UNDER LEFT SIDE OF DASH) CLOCK COIL SPRING (PART OF STEERING ASSEMBLY) CREW CAB DK GRN WIRE DOOR LOCK FUSE DOOR LOCK RELAY DOOR UNLOCK RELAY DRIVER DOOR LOCK SWITCH DRIVER DOOR UNLOCK RELAY DRIVER INFORMATION CENTER DRIVER MEMORY SEAT SWITCH DRIVER REAR WINDOW/ SEAT DOOR LOCK AUDIO SWITCH CONTROLLER DRIVER SEAT ADJUSTER SWITCH EXCEPT SIERRA FROM FUSE BLOCK (DIAGRAM 2 OF 4) FROM RAP FUSE (DIAGRAM 1 OF 4) FRONT FRONT PASSENGER SEAT ADJUSTER SWITCH FRONT PASSENGER WINDOW/ DOOR LOCK SWITCH INLINE FUSE LEFT FULL FEATURE SEAT LEFT HAND CONTROL SWITCH LEFT I/P FUSE BLOCK (ON LOWER LEFT SIDE OF DASH) LEFT POWER DOOR LOCK SWITCH LEFT POWER SEAT LEFT POWER WINDOW/ DOOR LOCK SWITCH MIR/ LOCK FUSE NCA WIRE ORG/ WIRE OUTSIDE MEMORY REAR VIEW SEAT MIRROR SWITCH SWITCH PASSENGER SEAT ADJUSTER SWITCH PWR WDO C.B. RADIO RAP 1 RELAY RAP 2 FUSE RAP JMPR RDO 1 FUSE RED WIRE RIGHT FULL FEATURE SEAT RIGHT HAND CONTROL SWITCH RIGHT I/P JUNCTION BLOCK RIGHT POWER SEAT SEATS CIRCUIT BREAKER SIERRA DENALI TO RAP 2 RELAY (DIAGRAM 1 OF 4) UPLEVEL, 4-DOOR VEHICLE INTERFACE UNIT (VIU)

1 2 3 4 BATTERY SRL DATA 1140 194 BATTERY DR UNLK RLY DR LK RLY SERIAL DATA ALL TIMES UNDERHOOD JUNCTION BLOCK (ON LEFT SIDE OF ENGINE COMPT) TBC FUSE BLK WIRE BODY CONTROL MODULE (ON LOWER LEFT SIDE OF DASH, BELOW STEERING COLUMN) BODY RELAY BLOCK (NEAR LEFT KICK PANEL) DK GRN/WHT WIRE DOOR LOCK RELAY DOOR UNLOCK RELAY DR LOCK FUSE DRIVER DOOR LOCK ACTUATOR DRIVER DOOR LOCK SWITCH GROUND GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES IGN KEY SIG IGNITION KEY ALARM SWITCH (PART OF STEERING COLUMN ASSEMBLY) INSTRUMENT PANEL CLUSTER VSS SIGNAL LEFT I/P FUSE BLOCK (ON LOWER LEFT SIDE OF DASH) LOCK LOCK FUSE LT BLU WIRE LT GRN WIRE MIR/ LOCK FUSE NCA WIRE ORG/ WIRE PASSENGER DOOR LOCK ACTUATOR PASSENGER DOOR LOCK SWITCH POWERTRAIN CONTROL MODULE (LEFT FRONT INSIDE OF ENGINE COMPARTMENT) VSS SIGNAL REMOTE CONTROL DOOR LOCK RECEIVER (BEHIND TOP CENTER OF DASH) SPLICE PACK 203 SPLICE PACK 203 (UPPER LEFT KICK PANEL) TAN WIRE TAN/BLK WIRE UNLOCK UNLOCK FUSE UNLOCK JMPR FUSE VSS DRV DR UNLK RLY WHT WIRE

1 2 3 4 BATTERY SRL DATA 1140 194 BATTERY UNLOCK IN LOCK IN SERIAL DATA 80 817 IGN KEY SWITCH VSS LF DR UNLK IN BLK WIRE BODY CONTROL MODULE (ON LOWER LEFT SIDE OF DASH, BELOW STEERING COLUMN) BODY RELAY BLOCK (NEAR LEFT KICK PANEL) DK GRN/WHT WIRE DOOR LOCK RELAY DOOR UNLOCK RELAY DR LOCK FUSE DRIVER DOOR LOCK ACTUATOR DRIVER DOOR UNLOCK RELAY DRIVER WINDOW/DOOR LOCK SWITCH GROUND GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES IGNITION KEY ALARM SWITCH (PART OF STEERING COLUMN ASSEMBLY) INSTRUMENT PANEL CLUSTER VSS SIGNAL LEFT I/P BLOCK (ON LOWER LEFT SIDE OF DASH) LOCK LOCK FUSE LT BLU WIRE LT GRN WIRE MIR/LOCK FUSE NCA WIRE ORG/ WIRE PASSENGER DOOR LOCK ACTUATOR PASSENGER WINDOW/DOOR LOCK SWITCH POWERTRAIN CONTROL MODULE (LEFT FRONT INSIDE OF ENGINE COMPARTMENT) VSS SIGNAL REMOTE CONTROL DOOR LOCK RECEIVER (BEHIND TOP CENTER OF DASH) RIGHT I/P FUSE BLOCK (ON LOWER RIGHT SIDE OF I/P) SPLICE PACK 203 SPLICE PACK 203 (UPPER LEFT KICK PANEL) TAN WIRE TAN/BLK WIRE UNLOCK UNLOCK FUSE WHT WIRE