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

A/T MANUAL SHIFT SWITCH ACC WAKEUP SRL DATA AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION SHIFT LEVER BLK TAN/ WIRE BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DATA BUS - DK BLU WIRE DK GRN WIRE FLD PRESS SW SIG C LOW REF GMLAN DATA BUS- GMLAN SERIAL DATA BUS + GMLAN SERIAL DATA REF BUS + GND B+ PC SOL VLV HI CTRL GRY WIRE LOW REF LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE MAIN PCS NCA WIRE ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PC SOL VLV LOW CTRL PNK FLD PRESS SW SIG A WIRE PNK WIRE POWER TAKE OFF (BLUNT CUT) POWER TAKE OFF (PTO) MODULE (OUTSIDE OF RIGHT FRONT CHASSIS FRAME) PPL PPL/WHT WIRE RED WIRE RED/BLK WIRE RED/WHT WIRE REPLICATED TOS SIG SSC VLV CTRL VLV CTRL TR SW SIG B TFT SENSOR SIG TAN WIRE TAN/BLK WIRE TAP TOW/ UP/ HAUL TAP SW DOWN SIG VOLT SW SIG TCC PCS TOW/ HAUL SWITCH TR SW SIG C TR SW SIG P TRANSMISSION CONTROL MODULE (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) VSS HIGH SIG VSS SIG LOW W/ ELECTRONIC STEERING CONTROL W/O 2 SPEED TRANSFER CASE WHT WIRE YEL WIRE YEL/BLK WIRE

451 1840 323 GND BATT + ACTUATOR SPLY VOLT 771 1530 RANGE SW SIG A MAIN PRESS SOL CTRL AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION FLUID PRESSURE (TFP) MANUAL VALVE POSITION SWITCH AUTOMATIC TRANSMISSION INTERNAL MODE SWITCH (IMS) AUX HVAC- IGN FUSE 45 BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM GMLAN DATA BUS (+) DK BLU WIRE EXTERIOR LIGHTS SYSTEM PNK PNK WIRE FUSE 13 GROUND DISTRIBUTION SYSTEM GRY WIRE HOT AT ALL TIMES UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) HOT W/ RUN/CRNK RELAY ENERGIZED IGN IGN 1 VOLT INSTRUMENT PANEL CLUSTER (IPC) LOGIC LT BLU WIRE LT BLU/ WHT WIRE LT BLU/WHT WIRE LT GRN/BLK WIRE MIL IND MISC IGN FUSE 40 ORG/ WIRE ORG/BLK WIRE P/N PNK PNK PNK PNK WIRE PNK WIRE PNK/ WHT WIRE PNK/BLK WIRE PNK/WHT WIRE POWER PPL/WHT WIRE RED/WHT WIRE STOP LAMP SWITCH (TOP OF BRAKE PEDAL ASSEMBLY) SYSTEM DISTRIBUTION TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC BRAKE SIG TCM-BATT FUSE 7 TFT SENSOR TOS SIG TOW/ HAUL IND TRANSMISSION CONTROL MODULE (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) WHT LT BLU/ WIRE WHT PNK/ WIRE WHT WIRE YEL WIRE YEL/BLK WIRE

AUXILIARY GENERATOR (W/ DUAL GENERATOR, AMBULANCE UPFITTER) BLK WIRE BRN WIRE CHARGE IND SIG CHARGE INDICATOR COMPUTER DATA LINES SYSTEM DK GRN WIRE DRIVER INFORMATION CENTER (DIC) ENGINE COMPT) ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF GENERATOR B+ GENERATOR SIG GM LAN SERIAL DATA GRY WIRE HOT AT ALL TIMES INSTRUMENT PANEL CLUSTER (IPC) IPC FUSE 43 LOGIC LOW SPEED MEGA FUSE POWER DISTRIBUTION SYSTEM RED WIRE RED/WHT WIRE RIGHT BATTERY SERIAL DATA (-) (1) TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) UNDERHOOD FUSE HOLDER (RIGHT SIDE OF FIREWALL) VOLT W/ DUAL GENERATOR, AMBULANCE UPFITTER WHT WIRE

2501 2500 976 COMPUTER DATA LINES SYSTEM BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CUT) DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) EXP/PTO FUSE 44 FUSE 49 GRY WIRE GRY/BLK WIRE HI SPD GMLAN SERIAL DATA HI SPD SERIAL DATA - HI SPD SERIAL DATA + LOW REF HI SPD SERIAL DATA - HI SPD SERIAL DATA + LOW REFERENCE HOT AT ALL TIMES HOT W/ RUN/CRNK RELAY ENERGIZED LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LT BLU WIRE LT BLU/WHT WIRE MISC IGN FUSE 40 MODE SELECT A PTO REMOTE SW SET SIG PTO RELAY COIL CTRL PTO SW INDICATOR CTRL PNK WIRE POWER TAKE OFF (PTO) PROVISION (BLUNT POWER TAKE OFF (PTO) RELAY POWER TAKE OFF (PTO) SWITCH POWER TAKE OFF MODULE (PTO) (OUTSIDE OF RIGHT FRONT CHASSIS FRAME) PPL PPL/WHT WIRE RED/ WHT WIRE RED/WHT WIRE REMOTE MODE ENABLE SIG PTO ENGAGE SIG PTO RLY ENGAGE SIG RES+ SERIAL DATA ENABLE SET OFF SHUTDOWN SIGNAL TAN WIRE TAN/BLK WIRE TCC BRAKE SIGNAL UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT RED/ WIRE WHT WIRE YEL WIRE

2-HI IND 4-HI IND 4-LO IND 5 VOLT REF INCRMT ENCODER SIG 6.0L (VIN G) 7475 7476 1693 1566 1565 PPL ACCY WAKEUP SRL DATA ASSEMBLY AUX HVAC-IGN FUSE 48 FUSE 45 AXLE ACTR CTRL AXLE SW SIG GMLAN BUS - GMLAN BUS + IGN 1 VOLT BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) BRN WIRE COMPUTER DATA LINES SYSTEM DIRTN SIG DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE FRONT AXLE ACTUATOR FUSE 19 FUSE 13 GAS GAS DIESEL GMLAN BUS - GMLAN BUS + INCRMT ENCODER SIG GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT W/ RUN/CRNK RELAY ENERGIZED HOT W/ RUN/CRNK RELAY ENERGIZED UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) IGN INSTRUMENT PANEL CLUSTER (IPC) LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LO REF SW SIG 4 HI IND CTRL 4 LO IND CTRL LOGIC LOW REF LT BLU WIRE LT GRN/BLK WIRE LT GRN/DK BLU WIRE MISC IGN FUSE 43 FUSE 40 MTR CTRL B MTR CTRL A BATT + GND NEUTRAL IND NEUTRAL IND CTRL 2 HI IND CTRL ORG/ WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL PPL/WHT WIRE PULSE SIG RED/BLK WIRE RIGHT I/P JUNCTION BLOCK SER DATA SHIFT MOTOR TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRANSFER CASE ENCODER MOTOR (ON TRANSFER CASE) TRANSFER CASE SHIFT CONTROL MODULE (LOWER LEFT SIDE OF DASH) TRANSFER CASE SHIFT CONTROL SWITCH (ON TOP LEFT OF TRANSFER CASE) TREC FUSE 67 FUSE 62 WHT WIRE WHT/GRN WIRE WIPER/WASHER SYSTEM YEL WIRE

A/T MANUAL SHIFT SWITCH ACC WAKEUP SRL DATA AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION SHIFT LEVER BLK TAN/ WIRE BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DATA BUS - DK BLU WIRE DK GRN WIRE FLD PRESS SW SIG C LOW REF GMLAN DATA BUS- GMLAN SERIAL DATA BUS + GMLAN SERIAL DATA REF BUS + GND B+ PC SOL VLV HI CTRL GRY WIRE LOW REF LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE MAIN PCS NCA WIRE ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PC SOL VLV LOW CTRL PNK FLD PRESS SW SIG A WIRE PNK WIRE POWER TAKE OFF (BLUNT CUT) POWER TAKE OFF (PTO) MODULE (OUTSIDE OF RIGHT FRONT CHASSIS FRAME) PPL PPL/WHT WIRE RED WIRE RED/BLK WIRE RED/WHT WIRE REPLICATED TOS SIG SSC VLV CTRL VLV CTRL TR SW SIG B TFT SENSOR SIG TAN WIRE TAN/BLK WIRE TAP TOW/ UP/ HAUL TAP SW DOWN SIG VOLT SW SIG TCC PCS TOW/ HAUL SWITCH TR SW SIG C TR SW SIG P TRANSMISSION CONTROL MODULE (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) VSS HIGH SIG VSS SIG LOW W/ ELECTRONIC STEERING CONTROL W/O 2 SPEED TRANSFER CASE WHT WIRE YEL WIRE YEL/BLK WIRE

AUXILIARY GENERATOR (W/ DUAL GENERATOR, AMBULANCE UPFITTER) BLK WIRE BRN WIRE CHARGE IND SIG CHARGE INDICATOR COMPUTER DATA LINES SYSTEM DK GRN WIRE DRIVER INFORMATION CENTER (DIC) ENGINE COMPT) ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF GENERATOR B+ GENERATOR SIG GM LAN SERIAL DATA GRY WIRE HOT AT ALL TIMES INSTRUMENT PANEL CLUSTER (IPC) IPC FUSE 43 LOGIC LOW SPEED MEGA FUSE POWER DISTRIBUTION SYSTEM RED WIRE RED/WHT WIRE RIGHT BATTERY SERIAL DATA (-) (1) TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) UNDERHOOD FUSE HOLDER (RIGHT SIDE OF FIREWALL) VOLT W/ DUAL GENERATOR, AMBULANCE UPFITTER WHT WIRE

A/C CMPRSR RELAY AIR BAG IGN FUSE 37 AUX HVAC- IGN FUSE 45 BCK/UP LAMP PCB RELAY BLK WIRE BRN WIRE CHMSL REAR CLIMATE CONTROL TRAILER BRAKE SEAT CONTROL MODULE MODULE (IF EQUIPPED) COMFORT, DECOR LEVEL 3 CONVENIENCE PACKAGE, W/ LUXURY DIGITAL VIDEO DISC (DVD) CONTROL MODULE (IF EQUIPPED) DRL PCB RELAY EAP FUSE 35 ECM IGN FUSE 53 ELECTRIC SHIFT, ACTIVE 2 SPEED ENGINE CONTROL MODULE (ECM) FAN FUSE 68 FAN RELAY FOG LAMP RELAY FROM BODY CONTROL MODULE (DIAGRAM 4 OF 5) FROM DLIS FUSE 32 (DIAGRAM 4 OF 5) FRONT DRIVE AXLE ACTUATOR FRT WASH PCB RELAY FUSE FUSE 33 GLOW PLUG CONTROL MODULE (GPCM) HDLP LO/HID RELAY HEATED STEERING WHEEL CONTROL MODULE HEATED STEERING WHEEL CONTROL MODULE INLINE FUSE HI BEAM PCB RELAY HORN PWR/TRN PCB RELAY RELAY HVAC-IGN FUSE 52 INFLATABLE RESTRAINT I/P MODULE ON/OFF INDICATOR (IF EQUIPPED) INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL L/GATE PCB RELAY LEFT I/P J/B (LOWER LEFT SIDE OF DASH) LEFT I/P J/B (LOWER LEFT SIDE OF DASH) PNK (NOT USED) WIRE MISC IGN FUSE 40 MODE ACTUATOR NCA WIRE PARK ELECTRONIC ENABLE ADJUSTABLE PCB PEDALS RELAY PCB RELAY PNK WIRE PNK/WHT WIRE POWER TAKE OFF (PTO) MODULE (IF EQUIPPED) PRK LAMP RELAY REAR VIEW CAMERA REAR WIPER FUEL WASH SPEED PCB PMP DEFOG PCB PCB RELAY RELAY RELAY RELAY RELAY RED WIRE RED/WHT WIRE RIGHT I/P J/B (IN RIGHT END OF DASH) RUN/ CRNK RELAY SECURITY VEHICLE INDICATOR INCLINATION LAMP SENSOR SEO SEO/ALC FUSE 51 STRTR RELAY TRANS IGN 1 FUSE 13 TRANSFER CASE SHIFT CONTROL MODULE STOP LAMP SWITCH TRANSMISSION CONTROL MODULE (TCM) TRLR LT STOP/TURN PCB RELAY TRLR RT STOP/TURN PCB RELAY VEHICLE SHOCK SENSOR W/ 2 SPEED ELECTRIC, MANUAL SHIFT CONTROL TRANSFER CASE W/ FRONT SEAT COOLING HEATER W/ SPO ACCESSORY REAR VIEW CAMERA W/O SPO ACCESSORY REAR VIEW CAMERA W/ SPO ALARM W/O 2 SPEED ELECTRIC, MANUAL SHIFT CONTROL TRANSFER CASE W/O FRONT SEAT COOLING HEATER W/O FRONT SEAT COOLING HEATER W/ FRONT SEAT COOOLING HEATER W/O W/ STEERING STEERING WHEEL WHEEL HEATER HEATER WIPER CONTROL PCB RELAY FRT WPR YEL WIRE

1 2 4 10 5 7 RETRACT CTRL EXTEND CTRL SENS SIG LOW REF SENS SIG 2 6 1 7 3 9 4 POSITION CTRL MTR COMM POSITION CTRL SPLY VOLT LOW REF 4 6 B+ GND 9 2 12 SERIAL DATA PNK WIRE AUTOMATIC DAY/NIGHT MIRROR BLK WIRE BLK/WHT WIRE BRN WIRE COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM ELECTROCHROMIC DDM FUSE 4 DEFOGGER SWITCH DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DOWN L/R SELECT DRIVER DOOR LOCK/ WINDOW SWITCH DRIVER OUTSIDE REARVIEW MIRROR EXTEND GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HVAC CONTROL MODULE I/P FUSE BLOCK (LEFT SIDE OF DASH, L/R SELECT SW PWR LEFT LOGIC LT BLU WIRE LT BLU/WHT WIRE MIRROR CIRCUIT ORG/BLK WIRE OUTSIDE REARVIEW MIRROR SWITCH PNK WIRE RED/WHT WIRE RETRACT RIGHT WHT WIRE YEL WIRE

1 2 4 10 5 7 RETRACT CTRL EXTEND CTRL SENS SIG LOW REF SENS SIG 2 6 1 3 7 POSITION CTRL MTR COMM POSITION CTRL LOW REF SPLY VOLT 4 6 B+ GND BLK WIRE BLK/WHT WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU/WHT WIRE DK GRN WIRE GROUND DISTRIBUTION SYSTEM GRY/BLK WIRE HOT AT ALL TIMES I/P FUSE BLOCK (LEFT SIDE OF DASH, LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PASSENGER DOOR LOCK/ WINDOW SWITCH PASSENGER OUTSIDE REARVIEW MIRROR PDM FUSE 9 POWER DISTRIBUTION SYSTEM PPL RED/WHT WIRE RIGHT I/P JUNCTION BLOCK (IN RIGHT END OF DASH) SERIAL DATA WHT WIRE YEL WIRE