GMC Sierra 3500 HD (2007-2012) hvac control module Wiring diagrams

A/C CMPRSR RELAY AIR BAG BATT FUSE 46 AMP FUSE 42 AUDIO AMPLIFIER BODY CONTROL MODULE (BCM) CHIME MODULE COOLING FAN (LEFT) COOLING FAN (RIGHT) DIGITAL RADIO RECEIVER DK GRN WIRE ECM BATT ELEC RUN BOARD ENGINE CONTROL MODULE (ECM) ESC/ALH EXH EXCEPT LUXURY NO RADIO EXP/ PTO FAN 1 FUSE FAN LO RELAY FAN WIPER HI CONTROL RELAY PCB RELAY FAN-2 FRT WPR FUSE FUSE 37 FROM LGM FUSE (DIAGRAM 1 OF 5) FRT WASH PCB RELAY FSCM FUSE 22 FUEL PUMP RELAY FUEL SYSTEM CONTROL MODULE (FSCM) FUSE 13 FUSE 15 FUSE 23 FUSE 3 FUSE 40 FUSE 49 FUSE 67 FUSE BLOCK (UNDERHOOD) (RIGHT SIDE OF FIREWALL) GPS, REAR ENTER- TAINMENT EXCEPT LUXURY GRY WIRE HDLP WASH HEAVY DUTY ABS WSW/HTR FUSE 61 FUSE 68 HORN PCB RELAY HVAC BATT HVAC BLWR FUSE 72 HVAC CONTROL MODULE INFOTMNT FUSE 47 INSTRUMENT PANEL CLUSTER (IPC) IPC FUSE 48 ITBC ABS-1 ABS 2 FUSE 7 FUSE 63 FUSE 10 J/B (LEFT I/P) J/B (LEFT I/P) (LOWER LEFT SIDE OF DASH) LT BLU WIRE LUXURY NCA WIRE POWER TAKE-OFF (BLUNT CUT) POWER TAKE-OFF (PTO) RELAY PPL PREMIUM AUDIO EXCEPT LUXURY PREMIUM AUDIO W/LUXURY RADIO REAR SEAT AUDIO (RSA) CONTROLLER RDO FUSE 43 REAR DEFOG RELAY REAR ENTER- TAINMENT EXCEPT LUXURY REAR ENTER- TAINMENT W/LUXURY REAR ENTER- TAINMENT W/LUXURY GPS EXCEPT LUXURY GPS W/ LUXURY RED WIRE RED/BLK WIRE RED/WHT WIRE STRTR RELAY TCM BATT TRAILER BRAKE CONTROLLER MODULE (TBCM) ELECTRONIC BRAKE CONTROL MODULE (EBCM) TRANSFER CASE ENCODER MOTOR TRANSFER CASE SHIFT CONTROL MODULE TREC FUSE 69 VIDEO COMMUNICATION INTERFACE MODULE (VCIM) VIDEO DISPLAY WHT WIRE WINDSHIELD WASHER SOLVENT HEATER J/B (RIGHT I/P) WINDSHIELD WIPER MOTOR WIPER SPEED PCB RELAY

2 OF 5) AIR BAG BATT FUSE 42 ALC/COMP FUSE 54 AMP FUSE 38 AUDIO AMPLIFIER (PREMIUM AUDIO BRANDED W/ AMPLIFIER SPEAKER SYSTEM) AUTOMATIC A/C AUX PWR 2 FUSE 2 AUX PWR FUSE 16 BLK WIRE BODY CONTROL MODULE (BCM) CENTER CONSOLE ACCESSORY POWER OUTLET CENTER CONSOLE COMPARTMENT ACCESSORY POWER OUTLET CENTER SEAT ACCESSORY POWER OUTLET CHIME POWER TAKE OFF MODULE (PTO) RELAY CREW CAB W/ INDIVIDUAL FRONT SEAT CREW CAB/ EXTENDED CAB W/ PERFORMANCE EXHANCED AUDIO, FRONT COMPARTMENT CONSOLE DIGITAL RADIO RECEIVER (IF EQUIPPED) ESC/ALC EXH FUSE 1 FROM HEAVY ABS-2 FUSE 8 (DIAGRAM 2 OF 5) FROM LEFT I/P J/B (DIAGRAM 2 OF 5) FROM LT DR CIRCUIT BREAKER (DIAGRAM GARAGE DOOR OPENER (GDO) HVAC CONTROL MODULE I/P 2 ACCESSORY POWER OUTLET INFO FUSE 22 LBEC 2 FUSE 67 LEFT I/P J/B (LOWER LEFT SIDE OF DASH) LGM FUSE 66 LOCK PCB UNLOCK PCB RELAY RELAY LOCK/UNLOCK PCB RELAY MANUAL A/C NCA WIRE ORG/ WIRE PASSENGER DOOR LOCK/ WINDOW SWITCH PDM FUSE 9 (W/ COMFORT, DECOR LEVEL 3 CONVENIENCE PACKAGE) PERFORMANCE ENHANCED AUDIO POWER LOCKS W/O INDIVIDUAL FRONT SEAT, POWER MIRROR POWER TAKE OFF (BLUNT CUT) PREMIUM AUDIO BRANDED W/ AMPLIFIER SPEAKER SYSTEM PTO FUSE 44 RADIO RDO FUSE 39 REAR SEAT AUDIO (RSA) CONTROL (IF EQUIPPED) RED WIRE RED/ WHT WIRE RED/BLK WIRE RED/WHT WIRE RIGHT I/P J/B (IN RIGHT END OF DASH) RSE FUSE 19 STOP IS LPS FUSE 17 LT STOP TRN FUSE 6 LAMPS FUSE TO BODY CONTROL MODULE (DIAGRAM 4 OF 5) TO DLIS FUSE 32 (DIAGRAM 4 OF 5) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VEHICLE COMMUNICATION INTERFACE MODULE (VCIM) VIDEO DISPLAY W/ CUSTOM FRONT COMPARTMENT FLOOR CONSOLE W/ FULL FEATURE CENTER CONSOLE W/ INDIVIDUAL FRONT SEAT, POWER MIRROR W/ LUXURY W/ ONSTAR W/ REAR SEAT ENTERTAIN- MENT PACKAGE W/O LUXURY W/O LUXURY, RADIO W/O RADIO W/O W/ LUXURY LUXURY WHT RED/ WIRE WHT WIRE WINDSHIELD WASHER SOLVENT HEATER (IF EQUIPPED)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 AIR TMP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 B(+) A/C ON AIR TEMP RF SUNLD AMB AIR TMP GMLAN L AMBIENT AIR TEMPERATURE SENSOR (ON LEFT SIDE OF RADIATOR SUPPORT) AMBIENT LIGHT/SUNLOAD SENSOR ASSEMBLY (TOP CENTER OF DASH) AUTO BATT POS VOLT BLK WIRE BLK/WHT WIRE BREAKOUT) BRN WIRE COLNT LVL GROUND LOW REF COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE ENGINE COOLANT LEVEL SWITCH (6.6L) (ON BOTTOM OF SURGE TANK) EVAPORATOR TEMPERATURE SENSOR (ON HVAC ASSEMBLY) FAN DN FAN UP FRESH AIR FRNT DFG FRT DEF A/C IND FSH AIR GROUND GROUND DISTRIBUTION SYSTEM GROUND IGN 3 REAR DEFOG GRY WIRE GRY/BLK WIRE HVAC CONTROL MODULE INSTRUMENT PANEL CLUSTER (IPC) DRIVER INFORMATION CENTER (DIC) DISPLAY LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LEFT SUNLOAD SENSOR LEFT TEMP CONTROL LF SUNLD L AIR TMP R AIR TMP LOGIC LOW REF LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MODE DN MODE UP MTR SPD CTRL OFF ORG/ WIRE POWER DISTRIBUTION SYSTEM DEFOGGER SYSTEM PPL PPL/WHT WIRE R AIR TMP AIR TMP R AIR TMP TEMP SENS MODE CTRL L AIR TMP RECIR CTRL R AIR TMP REAR DFG RECIR RECIRC RED WIRE RED/WHT WIRE RER DEF RIGHT I/P JUNCTION BLOCK (IN RIGHT END OF DASH) RIGHT SUNLOAD SENSOR RIGHT TEMP CONTROL SERIAL DATA TAN WIRE UPPER LEFT AIR TEMPERATURE SENSOR (UNDER UPPER LEFT SIDE OF DASH) UPPER RIGHT AIR TEMPERATURE SENSOR (UNDER UPPER RIGHT SIDE OF DASH) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

1 5 B(+) GMLAN L 2501 2500 COMPUTER DATA LINES SYSTEM 3340 5060 COMPUTER DATA LINES SYSTEM 4.3L 6.6L EXCEPT 4.3L, 6.6L 4.3L A/C CMPRSR FUSE 17 (EXCEPT 6.6L) FUSE 16 (6.6L) A/C CMPRSR RELAY A/C IND A/C ON A/C REFRIGERANT PRESSURE SENSOR (NEAR COMPRESSOR, ON A/C HIGH PRESSURE HOSE) BLK WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) GROUND GRY WIRE HOT AT ALL TIMES HVAC BATT FUSE 39 (EXCEPT 6.6L) FUSE 36 (6.6L) HVAC CONTROL MODULE LOGIC MANUAL A/C AUTOMATIC A/C ORG/BLK WIRE RED/WHT WIRE TAN WIRE TAN/BLK WIRE UNDER- HOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT)

2 OR MORE OF W/ ONSTAR, AUDIO AMPLIFIER (IF EQUIPPED) (UNDER REAR OF CENTER CONSOLE) BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) CHIME MODULE (CENTER OF DASH, BEHIND RADIO) DATA LINK CONNECTOR (DLC) (LOWER LEFT SIDE OF DASH) DIGITAL RADIO RECEIVER (BEHIND RIGHT END OF DASH) DIGITAL RADIO RECEIVER (IF EQUIPPED) (BEHIND RIGHT END OF DASH) DIGITAL RADIO, REAR SEAT, DK GRN WIRE DRIVER DOOR LOCK/WINDOW SWITCH DRIVER'S SEAT EARPHONE JACKS RADIO CONTROL GROUND DISTRIBUTION SYSTEM HEATED SEAT CONTROL MODULE (W/ SPO HEATED SEATS) HOT AT ALL TIMES HVAC CONTROL MODULE I/P FUSE BLOCK (LEFT SIDE OF DASH, INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) (UNDER INSTRUMENT PANEL CLUSTER (IPC) LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LOW SPD GMLAN SER DATA LOW SPEED GMLAN SERIAL DATA LOW SPEED SERIAL DATA LTR FUSE 53 (EXCEPT 6.6L) FUSE 50 (6.6L) MEMORY SEAT MODULE (W/ INDIVIDUAL FRONT SEAT) (UNDER FRONT OF NOT USED NOT USED PASSENGER DOOR LOCK/WINDOW SWITCH POWER DISTRIBUTION SYSTEM RADIO REAR OBJECT SENSOR CONTROL MODULE (AT REAR CARGO AREA, BEHIND TRIM PANEL) REAR SEAT AUDIO (RSA) CONTROL REAR SEAT AUDIO (RSA) CONTROL (IF EQUIPPED) RED/WHT WIRE REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR) (TOP REAR OF PASSENGER COMPT) RIGHT I/P JUNCTION BLOCK (IN RIGHT END OF DASH) TAN WIRE TAN/BLK WIRE THEFT DETERRENT CONTROL MODULE (TDM) (ON RIGHT SIDE OF STEERING COLUMN) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VEHICLE COMMUNICATION INTERFACE MODULE (VCIM) (BEHIND CENTER OF DASH) W/ DIGITAL RADIO W/ DIGITAL RADIO, REAR SEAT, ONSTAR, EARPHONE JACKS RADIO CONTROL W/ FRONT SEAT, REMOTE CONTROL W/ INDIVIDUAL FRONT SEAT W/ LUXURY EDITION W/ ONSTAR W/ RADIO PROVISIONS W/ REAR SEAT, EARPHONE JACKS RADIO CONTROL W/ REMOTE KEYLESS ENTRY W/O INDIVIDUAL FRONT SEAT W/O LUXURY EDITION W/O RADIO PROVISIONS WHT WIRE

2500 2501 COMPUTER DATA LINES SYSTEM 66 46 DATA BUS + DATA BUS - BLK WIRE BLK/WHT WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DRIVER INFORMATION CENTER (DIC) DISPLAY ECT SENS SIG ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) ENGINE COOLANT LEVEL SWITCH (ON BOTTOM OF SURGE TANK) ENGINE COOLANT TEMPERATURE (ECT) SENSOR (TOP FRONT CENTER OF ENGINE) ENGINE COOLING FAN (FRONT CENTER OF ENGINE COMPT) FAN FUSE 68 FAN RLY RELAY GMLAN L GRY WIRE HOT AT ALL TIMES HVAC CONTROL MODULE INSTRUMENT PANEL CLUSTER (IPC) LOGIC LOGIC B+ GND LOW REF LT GRN WIRE MANUAL A/C AUTOMATIC A/C RLY SPD SIG SERIAL DATA SPD SIG SW SIG TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL WIRE

ACCESSORY DC POWER CONTROL MODULE AUTOMATIC A/C MANUAL A/C 15 10 BARE BLK WIRE BLOWER MOTOR CONTROL MODULE BREAKOUT) CENTER CONSOLE ACCESSORY POWER OUTLET CENTER CONSOLE COMPARTMENT ACCESSORY POWER OUTLET CENTER HIGH MOUNTED STOP LAMP (CHMSL) DRIVER INFORMATION CENTER (DIC) SWITCH ELECTRONIC ADJUSTABLE PEDALS PCB RELAY ELECTRONIC COMPASS MODULE EXTENDED CAB/CREW CAB FROM HORN SWITCH HVAC CONTROL MODULE INSIDE REARVIEW MIRROR (ISRVM) LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LEFT STEERING WHEEL CONTROL SWITCH MIDDLE LEFT FRONT ROOF FRONT CLEARANCE OUTER LAMP ROOF CLEARANCE LAMP NCA WIRE PARK ENABLE PCB RELAY PASSENGER OUTSIDE REAR VIEW MIRROR PASSENGER WINDOW SWITCH PASSENGER DOOR LOCK/ WINDOW SWITCH REAR DOME READING LAMPS RIGHT FRONT OUTER ROOF CLEARANCE LAMP RIGHT I/P JUNCTION BLOCK (IN RIGHT END OF DASH) RIGHT STEERING WHEEL CONTROL SWITCH RIGHT SUNSHADE (IF EQUIPPED) SUNROOF MODULE SUNROOF SWITCH TO SPLICE W/ ACCESSORY STEERING CONTROL W/ ACCESSORY STEERING CONTROL, W/ ODOMETER SECURITY WIRING PROVISIONS W/ BODY BUILDER EMERGENCY LAMP W/ COMFORT, DECOR LEVEL 3 W/ LUXURY EDITION W/ MANUAL FOLDING MIRROR, HEATED MIRROR W/ MANUAL FOLDING MIRROR, HEATED MIRROR (IN RIGHT FRONT DOOR HARNESS) W/ ROOF MARKER LAMP W/ ROOF MOUNTED LAMP PROVISIONS W/ STEERING WHEEL HEATER, ACCESSORY STEERING CONTROL, AUTOMATIC CRUISE CONTROL W/ STEERING WHEEL HEATER, AUTOMATIC CRUISE CONTROL W/ SUNROOF MOUNTED/SLIDING LAMP PROVISION W/ SUNROOF MOUNTED/SLIDING LAMP PROVISION W/O ROOF MARKER LAMP W/ SUNROOF SLIDING W/ WRECKER EMERGENCY LAMP W/O STEERING WHEEL HEATER W/O STEERING WHEEL HEATER, ACCESSORY STEERING CONTROL, AUTOMATIC CRUISE CONTROL WHT WIRE

AMBIENT LIGHT SENSOR AMBIENT LIGHT/ SUNLOAD SENSOR AUTOMATIC A/C AUTOMATIC A/C MANUAL A/C 8 3 AUTOMATIC TRANSMISSION SHIFT LEVER BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) BRAKE FLUID LEVEL SWITCH DATA LINK CONNECTOR DRIVER DOOR LATCH DRIVER DOOR LOCK/ WINDOW SWITCH DRIVER DRIVER DOOR DOOR LOCK LATCH SWITCH DRIVER SEAT BACK VENTILATION HEATING, COOLING MODULE DRIVER SEAT CUSHION VENTILATION HEATING, COOLING MODULE DRIVER WINDOW SWITCH EXCEPT HYBRID FRONT DOOR LOCK DIODE FRONT DOOR UNLOCK DIODE HEADLAMP, PANEL I/P DIMMER MULTI-FUNCTION SWITCH SWITCH HVAC CONTROL MODULE HYBRID, W/O NON BUCKET FRONT INDIVIDUAL SEAT INSTRUMENT PANEL CLUSTER (IPC) LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) MANUAL A/C NCA WIRE PASSENGER DOOR LATCH PASSENGER DOOR LOCK SWITCH PASSENGER SEAT ADJUSTER SWITCH PASSENGER SEAT BACK VENTILATION HEATING, COOLING MODULE PASSENGER SEAT CUSHION VENTILATION HEATING, COOLING MODULE PASSENGER SEAT LUMBAR SWITCH POWER WINDOW REAR DOOR LOCK DIODE REAR DOOR UNLOCK DIODE RIGHT I/P JUNCTION BLOCK (IN RIGHT END OF DASH) THEFT DETERRENT MODULE TURN SIGNAL/ MULTI-FUNCTION SWITCH W/ FRONT HEATED/ COOLING SEATS W/ NON BUCKET FRONT INDIVIDUAL SEAT W/O W/O NON BUCKET, FRONT INDIVIDUAL SEAT, W/ COMFORT, DECOR LEVEL 3 W/O POWER DOOR LOCK CONTROL W/O POWER W/ POWER DOOR LOCK DOOR LOCK CONTROL CONTROL WHT WIRE WINDSHIELD WIPER (HYBRID) MOTOR A/C COMPRESSOR

7 3 SUPPLY VOLT LOW REF BATTERY BLK WIRE COMPUTER DATA LINES SYSTEM DDM FUSE DK GRN WIRE DRIVER DOOR SWITCH (DDS) FUSE BLOCK (I/P) (LEFT SIDE OF DASH) GROUND HOT AT ALL TIMES HVAC CONTROL MODULE JUNCTION BLOCK (RIGHT I/P) (IN RIGHT END OF DASH) LOW REF OUTSIDE REARVIEW MIRROR- DRIVER OUTSIDE REARVIEW MIRROR- PASSENGER PASSENGER DOOR SWITCH (PDS) PDM FUSE POWER DISTRIBUTION SYSTEM R DEF REAR DEFOG SWITCH RED WIRE RED/WHT WIRE SERIAL DATA SUPPLY VOLT WHT WIRE

AUTO A/C BLK WIRE GAS DIESEL HOT AT ALL TIMES HTD MIR FUSE 53 FUSE 51 HVAC CONTROL MODULE IGN LOGIC MANUAL A/C NCA WIRE ORG/ WIRE OUTSIDE REARVIEW MIRROR- DRIVER OUTSIDE REARVIEW MIRROR- PASSENGER REAR DEFOG RELAY REAR DEFOG RELAY CTRL REAR DEFOG SWITCH UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE