GMC Cab & Chassis Sierra 3500 HD (2008-2012) yel Wiring diagrams

4 SPEED 6 SPEED A/T A/T 6.0L (VIN 5) AUTOMATIC A/C AUTOMATIC TRANSMISSION AUXILIARY BATTERY AUXILIARY BATTERY RELAY (IF EQUIPPED) (REAR OF ENGINE COMPT) BLK WIRE BODY BUILDER EMERGENCY LAMP DK GRN WIRE ECM- TCM-BATT HDLP BATT WASH FUSE 14 FUSE 12 FUSE 22 ELECTRONIC, ACTIVE 2 SPEED ACTIVE 2 SPEED 6.0L (VIN K) EMERGENCY LAMP PROVISIONS EMERGENCY VEHICLE PROVISION (BLUNT CUT) EXCEPT 6.0L (VIN 5) FUSE FUSE FUSE FUSE HOLDER (RIGHT SIDE FUSIBLE LINK 1 (14 GA- FUSIBLE LINK 2 (14 GA- FUSIBLE LINK 3 GENERATOR HVAC BATT FUSE 39 I/P 1 ACCESSORY POWER OUTLET DATA LINK CONNECTOR (DLC) INSTRUMENT BODY CONTROL PANEL MODULE CLUSTER (IPC) (BCM) IPC FUSE 46 ITBC FUSE 6 TREC FUSE 67 FUSE 37 LEFT BATTERY LEFT I/P J/B (LOWER LEFT SIDE OF DASH) LT BLU WIRE LT GRN WIRE LTR STUD 2 FUSE 53 FUSE 63 MANUAL A/C MEGA FUSE MEGA FUSE (RIGHT REAR OF ENGINE COMPT) MEGA MEGA OF FIREWALL) FUSE FUSE MOBILE RADIO FUSE BLOCK FUSE (BEHIND RIGHT SIDE OF DASH) MODULE NCA WIRE ORG/ WIRE POWER SUPPLY POWER SUPPLY, AUXILIARY BATTERY RED WIRE RED/ WHT WIRE RED/BLK WIRE RED/WHT WIRE RELAY RELAY A RELAY B RIGHT BATTERY RIGHT I/P J/B (IN RIGHT END OF DASH) RUN WIRE STARTER MOTOR TO AUXILIARY FUSE BLOCK (DIAGRAM 7 OF 7) TO LEFT I/P J/B (DIAGRAM 4 OF 7) TO ROOF BEACON SWITCH (DIAGRAM 2 OF 7) TO STUD 1 FUSE 68 (DIAGRAM 2 OF 7) TO UNDERHOOD FUSE BLOCK (DIAGRAM 2 OF 7) TO UNDERHOOD FUSE BLOCK (DIAGRAM 3 OF 7) TO UNDERHOOD FUSE BLOCK (DIAGRAM 6 OF 7) TRAILER PROVISION (BLUNT CUT) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) W/ AUXILIARY BATTERY W/ EMERGENCY VEHICLE ROOF LAMP RELAY W/ WRECKER W/ WRECKER RELAY (4.3L) (TOP LEFT REAR OF ENGINE) WHT RED/ WIRE WHT WIRE WRECKER RELAY WSW/HTR FUSE 66 YEL WIRE

2 SPEED ACTIVE 2 SPEED ELECTRONIC BODY CONTROL MODULE (BCM) BRN WIRE DLIS FUSE 35 DRIVER WINDOW SWITCH END OF DASH) FROM LBEC 1 FUSE 64 (DIAGRAM 3 OF 7) FROM UNDERHOOD FUSE BLOCK (DIAGRAM 3 OF 7) IGN IGNITION SWITCH INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL KEY-IN IGNITION SWITCH LEFT I/P J/B (LOWER LEFT SIDE OF DASH) NCA WIRE OFF ORG/ WIRE PASSENGER WINDOW SWITCH PNK WIRE PNK/BLK WIRE POWER SUPPLY RED/WHT WIRE RIGHT I/P J/B (IN RIGHT RIGHT I/P J/B (IN RIGHT END OF DASH) RIGHT STEERING LEFT STEERING WHEEL CONTROL WHEEL CONTROL SWITCH SWITCH RUN WIRE SUNROOF CONTROL MODULE (IF EQUIPPED) THEFT DETERRENT MODULE (TDM) TO RUN/CRNK RELAY (DIAGRAM 5 OF 7) TO UNDERHOOD FUSE BLOCK (DIAGRAM 5 OF 7) TRANSFER CASE SHIFT CONTROL SWITCH UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VOLT IGN W/ 10 SERIES W/ 4 SPEED, ACCESSORY STEERING WHEEL, AUTOMATIC ELECTRONIC CRUISE CONTROL W/ 6-SPEED W/ ACCESSORY STEERING WHEEL, AUTOMATIC ELECTRONIC CRUISE CONTROL W/0 10 SERIES, W/O ACCESSORY STEERING WHEEL CONTROL W/O ACCESSORY STEERING WHEEL, AUTOMATIC ELECTRONIC CRUISE CONTROL WHT WIRE YEL WIRE

4.3L 4.3L, 6.0L (VIN K) 6.0L PTO (VIN 5) A/C CMPRSR RELAY AIR BAG IGN FUSE 40 AUTOMATIC TRANSMISSION (4 SPEED A/T) AUX HVAC-IGN FUSE 48 BCK/UP LAMP PCB RELAY BLK WIRE BRN WIRE DRIVE MOTOR GENERATOR POWER INVERTER MODULE (6.0L (VIN 5)) ECM-IGN FUSE 56 ELECTRONIC BRAKE CONTROL MODULE (EBCM) ELECTRONIC, ACTIVE 2 SPEED FOG LAMP DRL PCB RELAY RELAY FROM BODY CONTROL MODULE (DIAGRAM 4 OF 7) FROM DLIS FUSE 35 (DIAGRAM 4 OF 7) FRONT DRIVE AXLE ACTUATOR FRT WPR FUSE 36 FUEL PUMP FLOW CONTROL MODULE HDLP LO/HID RELAY HEATED STEERING WHEEL CONTROL MODULE INLINE FUSE HI BEAM PCB RELAY HORN PCB RELAY HVAC-IGN FUSE 55 INFLATABLE RESTRAINT I/P MODULE DISABLE SWITCH (IF EQUIPPED) INFLATABLE RESTRAINT PASSENGER AIR BAG ON/OFF INDICATOR (IF EQUIPPED) INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL L/GATE FRT WASH PCB RELAY PCB RELAY LEFT AIR ENGINE TEMPERATURE CONTROL ACTUATOR MODULE (ECM) (AUTOMATIC A/C) LEFT I/P J/B (LOWER LEFT SIDE OF DASH) MISC ING FUSE 43 MODE ACTUATOR NCA WIRE PARK LAMP RELAY PNK WIRE PNK/ WHT WIRE PNK/WHT WIRE REAR DEFOG RELAY RECIRCULATION ACTUATOR RED WIRE RIGHT I/P J/B (IN RIGHT END OF DASH) RUN/ CRNK RELAY SEAT CLIMATE CONTROL MODULE (IF EQUIPPED) SECONDARY FUEL PUMP (6.0L(VIN K) W/O AUXILIARY (FSCM) FUEL TANK) SEO/ALC FUSE 54 SERIAL DATA GATEWAY (SDG) MODULE STRTR RELAY TO FAN 1 FUSE 57 (DIAGRAM WIPER CONTROL 6 OF 7) PCB RELAY TRANS IGN 1 FUSE 19 TRANSMISSION CONTROL MODULE (TCM) TRLR LT STOP/TURN PCB RELAY TRLR RT STOP/TURN PCB RELAY W/O W/ STEERING STEERING WHEEL WHEEL HEATER HEATER WIPER REAR FUEL CHMSL SPEED WASH PMP PCB PCB PCB RELAY RELAY RELAY RELAY YEL WIRE

4.3L 6.0L (VIN 5) AUXILIARY BATTERY BANK 1 BANK 2 SENSOR 2 SENSOR 2 BANK 1 SENSOR 1 BANK 2 SENSOR 1 CENTRAL SEQUENTIAL FUEL INJECTION (CENTRAL SFI) COMFORT, DECOR LEVEL 3 CONVENIENCE PACKAGE, W/ LUXURY EAP FUSE 38 ECM/THROT CONT FUSE 5 ELECTRONIC ADJUSTABLE PEDALS PCB RELAY ENG FUSE 4 ENGINE CONTROL MODULE (ECM) EVAPORATIVE EMISSION (EVAP) CANISTER PURGE SOLENOID VALVE EXCEPT 4.3L EXCEPT 4.3L 4.3L FAN CNTRL RELAY (EXCEPT 6.0L(VIN 5)) FROM AUXILIARY BATTERY RUN RELAY (DIAGRAM 1 OF 7) FROM FRT WPR FUSE 36 (DIAGRAM 5 OF 7) FUEL FUEL INJECTOR INJECTOR FUSE 52 HEATED HEATED OXYGEN OXYGEN SENSOR SENSOR HEATED OXYGEN SENSOR IGNITION COIL 3 IGNITION IGNITION COIL 1 CONTROL MODULE (ICM) IGNITION IGNITION COIL 5 COIL 7 INJ-A FUSE 24 LEFT I/P J/B (LOWER LEFT SIDE OF DASH) MASS AIR FLOW (MAF)/ INTAKE AIR TEMPERATURE (IAT) SENSOR NCA WIRE PARK ENABLE PCB RELAY PNK WIRE PNK/BLK WIRE PNK/BLK) PNK (OR WIRE POWER TAKE OFF (PTO) MODULE (IF EQUIPPED) PWR/ TRN RELAY RED/WHT WIRE SECURITY INDICATOR LAMP SNSR FUSE 18 SNSR FUSE 8 TO AUXILIARY FUSE BLOCK (DIAGRAM 7 OF 7) TO INJ-B FUSE 13 (DIAGRAM 7 OF 7) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VALVE LIFTER OIL MANIFOLD (VLOM) ASSEMBLY (5.3L, 6.0L(VIN Y), 6.0L(VIN S) VEHICLE INCLINATION SENSOR VEHICLE SHOCK SENSOR YEL WIRE

17 12 8 11 HDLP OFF HDLP ON PRK LMP AMB LGHT 18 25 HDLP DIM SW SIG FLASH TO PASS 23 11 DRL RLY FOG LMP RLY 2500 2501 COMPUTER DATA LINES SYSTEM 8 9 SERIAL DATA + SERIAL DATA - BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT CHEVROLET DK BLU WIRE DK GRN WIRE DK GRN/WHT (OR ORG) WIRE DK GRN/WHT WIRE DKGRN/ WHT WIRE DRL 2 FUSE 33 FUSE 30 FLASH TO PASS SWITCH FOG LP SW GASOLINE DIESEL GMC GRY WIRE HDLP LO/HID RELAY HEADLAMP DIMMER SWITCH HI BEAM PCB RELAY HI BEAM RLY HI HEAD- LAMP LT FUSE 32 FUSE 29 HI HEAD- LAMP RT FUSE 30 FUSE 21 HOT AT ALL TIMES LEFT FRONT SIDE MARKER LAMP LEFT HIGH BEAM HEADLAMP LEFT LOW BEAM HEADLAMP LO BEAM RLY LO HDLP LT FUSE 12 LO HDLP RT FUSE 16 FUSE 15 LOWER LEFT PARK/TURN SIGNAL LAMP LOWER RIGHT PARK/TURN SIGNAL LAMP LT BLU WIRE LT GRN/BLK (OR ORG) WIRE LT GRN/BLK WIRE LTGRN/ BLK WIRE ORG/ WIRE PK BRAKE SIG PNK/WHT WIRE POWER DISTRIBUTION SYSTEM RED/BLK WIRE RIGHT FRONT SIDE MARKER LAMP RIGHT HIGH BEAM HEADLAMP RIGHT LOW BEAM HEADLAMP SIDE OF DASH) TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TO FOG LAMP RELAY (DIAGRAM 2 OF 2) TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) UNDERHOOD FUSE HOLDER (DIESEL: RIGHT SIDE OF FIREWALL) UPPER LEFT PARK/TURN SIGNAL LAMP UPPER RIGHT PARK/TURN SIGNAL LAMP WHT WIRE YEL WIRE YEL/BLK WIRE

6399 (OR 821) 71 72 73 VSS HIGH SIG VSS LO SIG GND A/C CL CTRL A/C PRESS SIG LO REF AIR CONDITIONING SYSTEM ANTI-LOCK BRAKES SYSTEM AXL SW SIG BANK 1 SENSOR 2 (DOWNSTREAM OF LEFT CATALYTIC CONVERTER) BANK 2 SENSOR 2 (DOWNSTREAM OF RIGHT CATALYTIC CONVERTER) BLK WIRE BLK/WHT WIRE BRK SW SIG BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM COOLING FANS SYSTEM COOLING FANS SYSTEM COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) FRONT FUEL PUMP, FUEL CTRL FUEL CTL-SEC STRT RLY CTRL FUEL LVL-SEC FUEL PMP RELAY FUEL PUMP FUSE 20 FUEL TANK PRESSURE (FTP) SENSOR (ON FUEL PUMP, SENDER ASSEMBLY) GMLAN - GMLAN + GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HEATED OXYGEN HOT AT ALL TIMES IAT SIG LO REF IGN 1 VOLT LO REF LO REF LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE MAF SIG MIL CTRL PPL NCA WIRE ORG/BLK WIRE ORG/WHT WIRE PNK WIRE PNK/BLK WIRE PPL PPL FUEL LVL-PRI CFAN HI CTL ACC SER DATA PPL LO REF FTP SIG PPL/WHT WIRE PWTN RLY CTRL RED/WHT WIRE SENDER ASSEMBLY (IN FRONT FUEL TANK) STARTING/ CHARGING SYSTEM TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VSS CFAN LO CTRL W/ 10 SERIES W/ 31 SERIES W/O 10 SERIES WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

ACCELERATOR PEDAL POSITION (APP) SENSOR (ABOVE ACCELERATOR PEDAL) BLK/WHT WIRE BRN WIRE BRN/WHT WIRE DK BLU WIRE DK BLU/WHT WIRE ECM BATT FUSE 12 ECM-IGN FUSE 56 ECM/THROT CONT FUSE 5 ENG FUSE 4 FUEL INJECTORS (TOP OF LEFT CYLINDER BANK) FUEL INJECTORS (TOP OF RIGHT CYLINDER BANK) FUSE 18 (DIAGRAM 3 OF 5) HOT AT ALL TIMES HOT W/ RUN/CRNK RELAY ENERGIZED IAT INJ-A FUSE 24 INJ-B FUSE 13 LT BLU WIRE LT BLU/BLK WIRE LT GRN/BLK WIRE MAF ORG/BLK WIRE PNK 1 2 WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PNK/WHT WIRE PPL PPL PNK PNK WIRE PWR/ TRN RELAY RED/WHT WIRE SNSR FUSE 8 TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCM- BATT FUSE 14 UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) W/ TWO SPEED TRANSFER CASE ACTIVE PUSH BUTTON, ELECTRIC SHIFT CONTROL W/O TWO SPEED TRANSFER CASE ACTIVE PUSH BUTTON, ELECTRIC SHIFT CONTROL WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

AUX HVAC-IGN FUSE 48 BANK 1 SENSOR 1 (UPSTREAM OF LEFT CATALYTIC CONVERTER) BANK 2 SENSOR 1 (UPSTREAM OF RIGHT CATALYTIC CONVERTER) BLK WIRE BLK/WHT WIRE BRAKE FLUID LEVEL SWITCH (ON BRAKE MASTER CYLINDER RESERVOIR) BRN WIRE BRN/WHT WIRE CAMSHAFT POSITION (CMP) SENSOR (FRONT OF ENGINE, ABOVE CRANK PULLEY) COMPUTER DATA LINES SYSTEM CRANKSHAFT POSITION (CKP) SENSOR (RIGHT REAR OF ENGINE) DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (ON TOP OF ENGINE) ENGINE OIL PRESSURE (EOP) SENSOR (TOP REAR OF ENGINE) ENGINE OIL PRESSURE IND FROM INJ-B FUSE 13 (DIAGRAM 2 OF 5) GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HEATED OXYGEN HOT AT ALL TIMES UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) IPC FUSE 46 HOT IN RUN OR START IGN B+ IGN MALFUNCTION INDICATOR LAMP INSTRUMENT PANEL CLUSTER (IPC) LO BUS LOGIC LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR (ON TOP OF INTAKE MANIFOLD) NCA WIRE ORG/BLK WIRE PNK PNK 14 15 WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE POWER DISTRIBUTION SYSTEM PPL PPL PNK PNK 5 6 7 WIRE PPL PNK PNK WIRE PPL/WHT WIRE RED/WHT WIRE SNSR FUSE 18 TAN WIRE TAN/WHT WIRE W/ BASE BODY OR CHASSIS BODY EQUIPMENT W/O BASE BODY OR CHASSIS BODY EQUIPMENT WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

BLK WIRE BRN WIRE BRN/WHT WIRE CKP SIG DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE COMPT NEAR FAN SHROUD) ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF GRY WIRE GRY/BLK WIRE GRY/WHT WIRE IC 1 CTRL IC 2 CTRL IC 3 CTRL IC 4 CTRL IC 5 CTRL IC 6 CTRL IC 7 CTRL IC 8 CTRL IGNITION COILS (UPPER LEFT SIDE OF ENGINE) LO REF LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PNK PNK WIRE PNK PPL WIRE PNK WIRE PNK/BLK WIRE PPL PPL PNK PNK WIRE PPL/WHT WIRE RED WIRE SPARK PLUG TAN WIRE TAN/WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

BLK WIRE BREAKOUT) BRN WIRE BRN/WHT WIRE CHG IND SIG CMP SIG CYL OFF CTRL 4 DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) EOP SIG EVAPORATIVE EMISSION (EVAP) CANISTER PURGE SOLENOID VALVE (ON INTAKE MANIFOLD) GEN FDC SIG GRY WIRE GRY/WHT WIRE HARNESS, 5 CM IGNITION COILS (UPPER RIGHT SIDE OF ENGINE) INJ 2 CTRL INJ 3 CTRL INJ 4 CTRL INJ 7 CTRL LO REF LO REF LO REF LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE MAP SIG PPL NCA WIRE ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PNK PPL WIRE PNK WIRE PNK/BLK WIRE PPL PPL/WHT WIRE RED WIRE SOL CTRL CYL OFF CTRL 3 CYL OFF CTRL 1 CYL OFF CTRL 2 SPARK PLUG STARTING/ CHARGING SYSTEM TAC MTR CTRL 2 TAC MTR CTRL 1 TAN WIRE TAN/WHT WIRE YEL WIRE YEL/BLK WIRE