Buick LaCrosse II facelift (2013-2016) gry/vio Wiring diagrams

1 2 SERIAL DATA (-) SERIAL DATA (+) 8 7 6 5 4 3 2 1 BATT POS VOLT GROUND BLK WIRE BLU WIRE BLU/YEL WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY DRIVER OUTSIDE REARVIEW MIRROR DRIVER SIDE OBJECT DETECTION INDICATOR DRIVER OUTSIDE REARVIEW MIRROR GLASS GRN WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/VIO WIRE GRY/YEL WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER LED SIGNAL LEFT SIDE OBJECT SENSOR (BEHIND LEFT REAR WHEEL) LOGIC OBST DETCT FUSE PASSENGER OUTSIDE REARVIEW MIRROR RED/GRN WIRE RIGHT SIDE OBJECT SENSOR (BEHIND RIGHT REAR WHEEL) SERIAL DATA (-) SERIAL DATA (+) ENABLE 2 SERIAL DATA (-) SERIAL DATA (+) ENABLE 2 DET LED SIG LED SIGNAL UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) WHT/GRN WIRE YEL WIRE YEL/VIO WIRE

BLU WIRE BLU/YEL WIRE BRN WIRE COMM ENABLE DATA COM ENABLE FRONTVIEW CAMERA MODULE (W/ LANE DEPARTURE WARNING, COLLISION ALERT) GRN WIRE GRN/VIO WIRE GRN/WHT WIRE GRY/VIO WIRE HS SERIAL DATA - HUMAN MACHINE INTERFACE CONTROL MODULE INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (BELOW CENTER CONSOLE) LEFT HEADLAMP BALLAST LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP HORIZONTAL MOTOR LINEAR INTERCONNECT NETWORK BUS 6 MOST CTRL MOST SER DATA (+) MULTI-AXIS ACCELERATION SENSOR (UNDER CENTER CONSOLE BETWEEN FRONT SEATS) NETWORK BUS 1 NETWORK BUS 5 NETWORK BUS 6 ORG/ WIRE RIGHT HEADLAMP BALLAST RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP HORIZONTAL MOTOR SER DATA SER DATA (-) (1) SER DATA COMM ENABLE SUNROOF CONTROL MODULE (BEHIND ROOF CONSOLE) SUNROOF SUNSHADE MOTOR MODULE (REAR OF SUNROOF) VIO/YEL WIRE W/ ADAPTIVE CRUISE CONTROL W/O ADAPTIVE CRUISE CONTROL WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/VIO WIRE

23 22 COMM ENABLE WAKEUP SERIAL DATA 23 24 22 HI SPD DATA - HI SPD DATA + 9 16 24 25 NETWORK BUS 2 NETWORK BUS 1 HI SPD DATA + HI SPD DATA - BLK WIRE BLU WIRE BLU/YEL WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE DATA LINK CONNECTOR (LEFT SIDE OF DASH) DK BLU WIRE DLC FUSE BCM 3 FUSE GRN WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GROUND DISTRIBUTION SYSTEM GRY/VIO WIRE HOT AT ALL TIMES HS SERIAL DATA - IMMOBILIZER CONTROL MODULE (CENTER CONSOLE) INSTRUMENT PANEL INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) LINEAR INTERCONNECT NETWORK BUS 4 LO SPD GMLAN SER DATA LOGIC LEFT REAR WINDOW SWITCH LOGIC RIGHT REAR WINDOW SWITCH LT GRN/GRY WIRE NETWORK BUS 11 NETWORK BUS 2 NETWORK BUS 3 NETWORK BUS 4 RED/GRN WIRE RED/WHT WIRE STEERING WHEEL ANGLE SENSOR TRANSMISSION SHIFT LEVER POSITION INDICATOR VIO/YEL WIRE W/ KEYLESS ENGINE START SWITCH WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/VIO WIRE

14 3 4 MOST CTRL MOST SER DATA - MOST SER DATA + 21 18 17 NETWORK BUS 12 MOST SER DATA - MOST SER DATA + 3 8 5 LO SPD GMLAN SER DATA NETWORK BUS 5 NETWORK BUS 10 5 6 MOST SER DATA - MOST SER DATA + AUDIO AMPLIFIER (RIGHT SIDE OF TRUNK) GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/VIO WIRE HEAD-UP DISPLAY (IF EQUIPPED) INFO DISPLAY MODULE LINEAR INTERCONNECT NETWORK BUS 12 LINEAR INTERCONNECT NETWORK BUS 3 LO SPD GMLAN SER DATA LOGIC DRIVER WINDOW MOTOR LOGIC DRIVER WINDOW SWITCH LOGIC INSTRUMENT CLUSTER LOGIC PASSENGER WINDOW MOTOR MEDIA DISC PLAYER MOST CTRL MOST SER DATA (+) NETWORK BUS 10 RADIO RED/WHT WIRE RIGHT STEERING WHEEL CONTROLS SWITCH STEERING WHEEL AIR BAG COIL W/ PREMIUM AUDIO SPEAKER SYSTEM W/ REAR SEAT ENTERTAINMENT W/O PREMIUM AUDIO SPEAKER SYSTEM W/O REAR SEAT ENTERTAINMENT WHT/GRN WIRE WHT/VIO WIRE

185 61 WIPER/WASHER SYSTEM 2.4L 25 26 27 70 FUEL LVL LOW REF FUEL LVL SERIAL DATA 3.6L ABS IND. AIR BAG IND AMBIENT AIR TEMPERATURE SENSOR (LEFT FRONT OF VEHICLE ON BUMPER FASCIA) BATT POS VOLT IGNITION 1 VOLTAGE BELOW STARTER) BLK WIRE BLK/DK BLU WIRE BLK/LT GRN WIRE BLU WIRE BRAKE IND BRN/WHT WIRE CHARGING IND CHECK ENGINE INDI CTRL COMPUTER DATA LINES SYSTEM CRUISE IND DK BLU WIRE DK BLU/GRY WIRE DK BLU/LT GRN WIRE DK BLU/WHT WIRE DRIVER INFORMATION CENTER (DIC) DISPLAY ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) ENGINE CONTROLS SYSTEM ENGINE CONTROLS SYSTEM 3998 3997 1650 COMPUTER DATA LINES SYSTEM ENGINE COOLANT TEMPERATURE GAUGE ENGINE COOLANT TEMPERATURE IND ENGINE OIL PRESSURE SWITCH (FRONT OF ENGINE) ENGINE OIL PRESSURE SWITCH (LOWER FRONT OF ENGINE) ESC OFF IND FRONT FOG LAMPS IND FUEL GAUGE GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GROUND GRY WIRE GRY/VIO WIRE HEAD-UP DISPLAY HIGH BEAM IND HOT W/ IGNITION MAIN RELAY ENERGIZED ILLUMINATION INSTRUMENT CLUSTER LEFT TURN IND LINEAR NETWORK BUS 12 LOGIC LOW FUEL WARNING LAMP IND LOW SPD GMLAN SER DATA LOW TIRE PRESSURE IND LOW WASHER FLUID IND LOW WASHER FLUID IND CTRL LOW REF LT GRN WIRE MALFUNCTION IND MIL IGN FUSE NCA WIRE OIL LEVEL IND OIL PRESS SW OUTSIDE AMBIENT AIR TEMP SENS SIG PARK IND PARK LAMPS IND RED WIRE RED/GRY WIRE RED/WHT WIRE RIGHT TURN IND SEAT BELT IND SECURITY IND SERVICE BRAKE IND SPEEDOMETER TACHOMETER TCS/ECS IND TRACTION CONTROL OFF IND UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/GRY WIRE VIO/YEL WIRE WHT WIRE WHT/GRN WIRE WHT/VIO WIRE YEL/DK BLU WIRE

1 2 NETWORK BUS 4 RR DOOR AJAR SW SIG 2 1 LR DOOR AJAR SW SIG NETWORK BUS 2500 2501 1492 7684 COMPUTER DATA LINES SYSTEM 4 6 NETWORK BUS 3 RF DOOR AJAR SW SIG 6 4 LF DOOR AJAR SW SIG NETWORK BUS 4 9 5 NETWORK BUS 2 BLK WIRE BLU WIRE BLU/BLK WIRE BLU/VIO WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRAKE FLUID LEVEL SWITCH (ON BRAKE FLUID RESERVOIR) BRN WIRE COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM 5986 333 DRIVER DOOR LATCH ASSEMBLY DRIVER WINDOW MOTOR (DRIVER'S DOOR) ELECTRONIC BRAKE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) GRN WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/YEL WIRE GRY WIRE GRY/RED WIRE GRY/VIO WIRE LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR WINDOW SWITCH LIFT GATE AJAR SW SIG 1 LOGIC NETWORK BUS 2 PARK BRAKE CONTROL SWITCH PARK BRK RELEASE SW SIG PARK BRK SW SIG PARKING BRAKE CONTROL MODULE (BEHIND LEFT REAR WHEEL LINER) PASSENGER DOOR LATCH ASSEMBLY PASSENGER WINDOW MOTOR (FRONT PASSENGER'S DOOR) POWER DISTRIBUTION SYSTEM PRESS BRAKE REAR COMPARTMENT LID LATCH (IN TRUNK LID) RED/WHT WIRE RIGHT REAR DOOR LATCH ASSEMBLY RIGHT REAR WINDOW SWITCH RLY COIL CTRL SERIAL DATA BRK FLUID LVL TRANSMISSION SHIFT LEVER POSITION INDICATOR VIO WIRE VIO/GRY WIRE VOL REF PARK BRK SW SIG WHT WIRE WHT/BLU WIRE YEL WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 GROUND BATT POST VOLT WARNING IND SERIAL DATA (+) SERIAL DATA (-) SERIAL DATA BLK WIRE BLU WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM DK BLU WIRE DRIVER INFORMATION CENTER DISPLAY ENABLE DISABLE SW SIG FRONTVIEW CAMERA MODULE GRN WIRE GRY/VIO WIRE GRY/WHT WIRE HOT AT ALL TIMES IND DIM CTRL INSTRUMENT CLUSTER INSTRUMENT PANEL MULTI-FUNCTION SWITCH 2 LANE DEPARTURE WARNING IND LANE DEPARTURE WARNING SWITCH LRR LDW FUSE RADIO RED/GRY WIRE SERIAL DATA SERIAL DATA LOGIC UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) W/ ADAPTIVE CRUISE CONTROL WHT WIRE WHT/BLU WIRE WHT/GRN WIRE

1 2 3 4 5 6 7 8 9 10 11 12 BATT 1 2 3 4 5 6 7 8 9 10 11 12 GND AUDIO/VIDEO INPUT ADAPTER BK USB BLK WIRE BLU/VIO WIRE BRN WIRE BRN/GRY WIRE COMPUTER DATA LINES SYSTEM DISPLAY FUSE DRIVER SEAT HEADREST VIDEOS DISPLAY GRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/VIO WIRE HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LOGIC LOGIS/MODE FUSE LT RR AUD SIG RT AUX AUD SIG LT AUX AUD SIG AUX HI SIG BATT+ LVDS MEDIA DISC PLAYER MINI FUSE MOST CTRL SERIAL DATA NCA WIRE ONSTAR/ UHP FUSE PASSENGER SEAT HEADREST VIDEOS DISPLAY RDO FUSE RED/BLU WIRE RED/VIO WIRE RT RR AUD SIG RR AUD COM SIG AUX AUD COM SIG AUX LOW SIG USB USB GN WHT WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE

AUTO DISCONNECT CONTROL AUX WKUP SERIAL DATA AUXILIARY/ ELECTRIC TRANSMISSION FLUID PUMP BLK WIRE BLK/DK BLU WIRE BLK/YEL WIRE BRAKE POSITION BRK POS SNSR LOW REF BRK POS SNSR SIG BRN WIRE BRN/LT GRN WIRE COMPUTER DATA LINES SYSTEM COOLANT PUMP RELAY COIL CONTROL DISCONNECT SUPPLY VOLTAGE DK BLU WIRE DK BLU/VIO WIRE DK BLU/WHT WIRE DRIVER MOTOR CONTROL MODULE 1 STARTER/GENERATOR CONTROL MODULE FUSE GRY WIRE GRY/BLK WIRE GRY/VIO WIRE GRY/YEL WIRE HOT AT ALL TIMES UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) HOT W/ ENGINE CONTROLS IGNITION RELAY ENERGIZED HYBRID/EV BATTERY PACK (RIGHT SIDE OF LUGGAGE COMPT) HYBRID/EV POWERTRAIN CONTROL MODULE LT GRN WIRE LT GRN/DK BLU WIRE LT GRN/WHT WIRE MM TO BODY HARNESS) NCA WIRE ORG/ WIRE PNK WIRE PPL RED WIRE RED/YEL WIRE RELAY RESOLVER COSINE SIGNAL DRAIN WIRE RESOLVER MOTOR DRAIN WIRE RESOLVER MOTOR NEGATIVE RESOLVER SINE SIGNAL DRAIN WIRE STARTER/GENERATOR THREE PHASE MOTOR TEMP DRAIN WIRE TRANS AUX PMP FUSE TRANSMISSION AUXILIARY OIL PUMP RLY CTRL U PHASE V PHASE VIO WIRE VIO/YEL WIRE W PHASE WHT WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE

3 2 1 FAN SPD SIG 1 FAN SPD SIG 2 GROUND 5 4 BATT POS VOLT FAN SPD SNSR SUPPLY VOLT ACCESSORY WAKEUP AJAR SW SIG AUXILIARY/ ELECTRIC TRANSMISSION FLUID PUMP BATT POS VOLT BATT RVC FUSE BATTERY ENERGY CONTROL MODULE BLK WIRE BLK/BRN WIRE BLK/VIO WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/VIO WIRE BPIM BATT FUSE BPIM IGN FUSE BRN/LT GRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM COOLANT TEMP SNSR SIG SNSR LOW REFERENCE CURRENT SNSR LOW CURRENT SNSR SIG CURRENT SNSR SPLY DK BLU WIRE DK BLU/GRY WIRE FAN SPEED SNSR SUPPLY VOLT BATT POSITIVE VOLTAGE SERIAL DATA (+) SERIAL DATA (+) FROM HYBRID/ EV BATTERY SECTION 2 (DIAGRAM 4 OF 4) GRN WIRE GRY WIRE GRY/VIO WIRE GRY/YEL WIRE HIGH SER DATA HOT AT ALL TIMES HOT W/ ENGINE CONTROLS IGNITION RELAY ENERGIZED HOT W/ IGNITION MAIN RELAY ENERGIZED HYBRID/EV BATTERY PACK (RIGHT SIDE OF LUGGAGE COMPT) HYBRID/EV BATTERY PACK CABLE COVER HYBRID/EV BATTERY PACK CURRENT SENSOR HYBRID/EV POWERTRAIN CONTROL MODULE STARTER/GENERATOR CONTROL MODULE LOGIC HYBRID/EV BATTERY PACK COOLING FAN LOW SER DATA LT GRN/VIO WIRE LT GRN/WHT WIRE MAIN CONTACTOR MGU CLT PMP FUSE NCA WIRE ORG/ WIRE P-P BLOWER FUSE PRE-CHARGE CONTACTOR RED WIRE RED/BLK WIRE RED/DK BLU WIRE RED/VIO WIRE RED/YEL WIRE REFERENCE RUN/CRANK IGN 1 SER DATA SERIAL DATA SERIAL DATA (+) SERIAL DATA (-) BATT POSITIVE VOLTAGE STARTER/ GENERATOR COOLANT PUMP RELAY STARTER/GENERAROR COOLANT TEMPERATURE SENSOR (RIGHT FRONT SIDE OF ENGINE COMPT) UNDERHOOD FUSE BLOCK VIO WIRE VIO/BLK WIRE VIO/WHT WIRE VIO/YEL WIRE WHT BLU/BLK WIRE WHT WIRE WHT/YEL WIRE YEL/GRN WIRE