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

3 4 BATT POS VOLT BATT POS VOLT 4 17 5 BATT POS VOLT IND DIM CTRL HAZ LED 7 13 TRUNK LP CTRL INADVERTENT PWR CTRL BCM 7 BCM 2 FUSE BLOCK FUSE FUSE (LOWER LEFT SIDE OF DASH) BLK WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) CENTER CONSOLE COMPARTMENT LAMP CENTER CONSOLE COMPARTMENT LAMP SWITCH COMPUTER DATA LINES SYSTEM CRUISE CONTROL, SOUND SYSTEMS DIM SIG LED AMBIENT LIGHTING CTRL DIMMER SWITCH DRIVER DOOR COURTESY FOG LAMP SWITCH FUSE 32 GRN/GRY WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/GRN WIRE GRY/LT GRN WIRE HEADLAMP SWITCH HOT AT ALL TIMES INSTRUMENT PANEL INSTRUMENT PANEL COMPARTMENT LAMP INTR LP CTRL INTR LP DEFEAT SW SIG COURTESY LP SW SIG PUDDLE LAMP SUPLY VOLT 19 8 LAMP LEFT REAR DOOR COURTESY LEFT SUNSHADE LEFT SUNSHADE MIRROR LAMP LEFT TAILLAMP ASSEMBLY LIFT GATE AJAR SW SIG LIGHTING CTRL SW SIG LIGHTING CTRL SW REF LT GRN/GRY WIRE LT GRN/YEL WIRE NCA WIRE NETWORK BUS 3 NETWORK BUS 4 PASSENGER DOOR COURTESY REAR COMPARTMENT COURTESY LAMP REAR COMPARTMENT LID LATCH (IN TRUNK LID) RED/BRN WIRE RED/DK GRN WIRE RED/WHT WIRE RIGHT REAR DOOR COURTESY RIGHT SUNSHADE RIGHT SUNSHADE MIRROR LAMP UNDER HOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/BRN WIRE VIO/GRY WIRE W/ CUSTOM INTERIOR PACKAGE LAMP WHT WIRE WHT/BRN WIRE WHT/YEL WIRE YEL WIRE

12 24 HAZ SW LEFT TURN SIG HAZ SW RIGHT TURN SIG 13 7 22 BRK APPLY SENS SPLY VOLT BRK APPLY SENS SIG LO SPD GMLAN SER DATA 26 1 HAZ SW SIG B+ BACKUP LAMPS CIRCUIT BCM 3 BCM 4 FUSE FUSE BCM 7 FUSE BLK WIRE BLK/BRN WIRE BLU WIRE BLU/RED WIRE BLU/VIO WIRE BLU/WHT WIRE BLU/YEL WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE CENTER HIGH MOUNTED STOP LAMP COMPUTER DATA LINES SYSTEM FUSE 32 FUSE 52 GRN RED/ WIRE GRN WIRE GRN/RED WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BRN WIRE GRY/YEL WIRE HAZARD SWITCH HEAD PARK AUTO HEADLAMP SWITCH HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT PANEL MULTI-FUNCTION SWITCH 2 LEFT BACKUP LAMP LEFT LICENSE PLATE LAMP LEFT REAR SIDE MARKER LAMP LEFT REAR TURN SIGNAL LAMP LEFT TAIL LAMP ASSEMBLY LEFT TAIL/STOP LAMP LEFT TAILLAMP ASSEMBLY LOGIC OFF RED WIRE RED/BLK WIRE RED/DK GRN WIRE RED/LT GRN WIRE RED/WHT WIRE RIGHT LICENSE PLATE LAMP UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) USED) VIO WIRE VIO/GRY WIRE WHT WIRE WHT/YEL WIRE

ASSEMBLY BLK WIRE BLK/BRN WIRE BLK/WHT WIRE BLU WIRE BLU/VIO WIRE BLU/WHT WIRE BLU/YEL WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY DRIVER OUTSIDE REARVIEW MIRROR DRIVER OUTSIDE REARVIEW MIRROR LAMP LEFT TURN SIGNAL REPEATER LAMP GMLAN LO SPD GRN WIRE GRN/VIO WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/ VIO WIRE GRY/BRN WIRE INSTRUMENT CLUSTER LEFT FRONT PARK LAMP LEFT FRONT SIDE MARKER LAMP LEFT FRONT TURN SIGNAL LAMP LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP MULTIFUNCTION LED CONTROL MODULE LEFT PARK DAYTIME RUNNING LAMP LEFT TURN IND LOGIC MIRROR MIRROR LAMP PARK LAMP IND PASSENGER OUTSIDE REARVIEW PNK WIRE RIGHT TURN IND RIGHT TURN SIGNAL REPEATER LAMP RUN/CRANK IGNITION 1 VOLT SER DATA VIO WIRE VIO/GRY WIRE W/ HID W/O HID WHT WIRE WHT/ BLK WIRE WHT/ BLU WIRE WHT/YEL WIRE

2.4L 3.6L 5 VOLT REF BACKUP LAMPS CIRCUIT BLK WIRE BLK/BRN WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/RED WIRE BLU/VIO WIRE BLU/YEL WIRE BRN (OR GRY) WIRE BRN GRY/ WIRE BRN WIRE COMPUTER DATA LINES SYSTEMS ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) GRN WIRE GRN/VIO WIRE GRN/WHT WIRE GROUND DISTRIBUTION SYSTEM GRY/BRN WIRE HI SPD GMLAN SRL DATA BUS+ HYBRID/EV BATTERY PACK (RIGHT SIDE OF LUGGAGE COMPT) HYBRID/EV POWERTRAIN CONTROL MODULE LOGIC LOW REF PNK WIRE RIGHT BACKUP LAMP RIGHT FRONT PARK LAMP RIGHT FRONT TURN SIGNAL LAMP RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP MULTIFUNCTION LED CONTROL MODULE RIGHT FRONT SIDE MARKER LAMP RIGHT PARK DAYTIME RUNNING LAMP RIGHT REAR SIDE MARKER LAMP RIGHT REAR TURN SIGNAL LAMP RIGHT TAIL LAMP ASSEMBLY RIGHT TAIL/STOP LAMP SENS SIG STARTER/GENERATOR CONTROL MODULE TURN SIGNAL/ MULTI-FUNCTION SWITCH USED) VIO WIRE W/ HID W/O HID WHT WIRE WHT/GRN WIRE WHT/ORG WIRE WHT/RED WIRE WHT/YEL WIRE

1 2 33 32 RF DRL SPLY VOLT LF DRL SPLY VOLT 2 3 2540 2140 B+ B+ 22 10 5060 278 DATA LINES LOW SPD GMLAN SER DATA SYSTEM AMBIENT LIGHT SENS SIG 22 11 16 13 306 103 HDLP SW PARK LP SIG AMBIENT LIGHT/ SUNLOAD SENSOR (CENTER OF DASH) BCM 4 BCM 1 FUSE FUSE BLK WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BLU/GRN WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER CRUISE CONTROL, SOUND SYSTEMS FOG LAMP FUSE FRONT FOG GRN WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/BLU WIRE HDLP DIMMER SW HI BEAM SIG HDLP OFF SIG CTRL HDLP SW ON SIG HDLP SW FLASH TO PASS SIG HEADLAMP HIGH BEAM RELAY HEADLAMP LOW BEAM RELAY HEADLAMPS LEVELING CIRCUIT HIGH LOW FTP HOT AT ALL TIMES HOT AT ALL TIMES BATTERY FUSE BLOCK FUSE (TOP OF BATTERY) HVAC CONTROL MODULE INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) LAMP RELAY LED CONTROL MODULE LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP BALLAST LEFT HEADLAMP MULTIFUNCTION LED CONTROL MODULE LEFT HIGH BEAM SOLENOID ACTUATOR LEFT LOW BEAM HEADLAMP LEFT PARK/DAYTIME RUNNING LAMP LIGHTING CTRL SW REF LIGHTING CTRL SW SIG LOW REF LT HI BEAM FUSE RT HI BEAM FUSE RT HID FUSE LT HID FUSE NCA WIRE ORG/ WIRE RED WIRE RED/BLK WIRE RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP BALLAST RIGHT HEADLAMP MULTIFUNCTION RIGHT HIGH BEAM SOLENOID ACTUATOR RIGHT LOW BEAM HEADLAMP RIGHT PARK/DAYTIME RUNNING LAMP TO WINDSHIELD WIPER MOTOR) TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO BRN/ WIRE VIO WIRE WHT WIRE YEL WIRE

AUTO BLK WIRE BLU WIRE BLU/BLK WIRE BLU/VIO WIRE BRN WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DIMMER SWITCH DRIVER INFORMATION CENTER DISPLAY FOG LAMP SWITCH FRONT FOG LAMP IND GRN WIRE GRY WIRE GRY/RED WIRE HEAD PARK HEADLAMP SWITCH HIGH BEAM LAMP IND INSTRUMENT CLUSTER LEFT FRONT FOG LAMP LOGIC LOW SPD GMLAN SER DATA LT GRN WIRE OFF PARK BRAKE CONTROL SWITCH PARK BRK RELEASE SW SIG PARK BRK SW SIG PARKING BRAKE CONTROL MODULE (BEHIND LEFT REAR WHEEL LINER) RIGHT FRONT FOG LAMP VIO WIRE VOL REF PARK BRK SPLY VOLT WHT WIRE YEL WIRE YEL/RED WIRE

1 2 312 712 RH HDLP LO BEAM SPLY V LH HDLP LO BEAM SPLY V 16 11 22 HDLP SW ON SIG 23 18 10 DRL RELAY CTRL HDLP HI BEAM RLY CTRL FOG LAMP RLY CTRL 23 24 HI SPD GMLAN SER DATA (-) HI SPD GMLAN SER DATA (+) AMBIENT LIGHT SENS SIG AMBIENT LIGHT/ SUNLOAD SENSOR (CENTER OF DASH) BLK WIRE BLU/BRN WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN/VIO WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE FOG LAMP FUSE FRONT FOG LAMP FTP FUSE GRN WIRE GROUND GRY WIRE GRY/BLU WIRE HDLP DIMMER SW HI BEAM SIG HDLP OFF SIG CTRL HDLP SW PARK LP SIG HDLP SW FLASH TO PASS SIG HEADLAMP HIGH BEAM RELAY HEADLAMP LOW BEAM RELAY HI BEAM HI BEAM RT HID HVAC CONTROL MODULE LEFT DAYTIME RUNNING LAMP, LEFT HEADLAMP ASSEMBLY LEFT HIGH BEAM SOLENOID ACTUATOR LEFT LOW BEAM HEADLAMP LH FUSE RH FUSE FUSE LIGHTING CTRL SW REF LIGHTING CTRL SW SIG LOW REF LT HID RED WIRE RED/BLK WIRE RELAY RIGHT HEADLAMP ASSEMBLY RIGHT HIGH BEAM SOLENOID ACTUATOR RIGHT DAYTIME RUNNING LAMP RIGHT LOW BEAM HEADLAMP TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE WHT WIRE WHT/BRN WIRE WINDSHIELD WIPER MOTOR YEL WIRE

2500 2501 1134 7684 COMPUTER DATA LINES SYSTEM BATTERY FUSE BLOCK (TOP OF BATTERY) BLK WIRE BLU WIRE BLU/BLK WIRE BLU/VIO WIRE BRN WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM DIMMER SWITCH DRIVER INFORMATION CENTER DISPLAY FOG LAMP SWITCH FRONT FOG LAMP IND FUSE GRN WIRE GROUND GRY WIRE GRY/RED WIRE HEAD PARK AUTO HEADLAMP SWITCH HIGH BEAM LAMP IND HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGN INSTRUMENT CLUSTER LEFT FRONT FOG LAMP LOGIC LOW SPD GMLAN SER DATA LT GRN WIRE MIL IGN OFF PARK BRAKE CONTROL SWITCH PARK BRK APPLY SW SIG PARK BRK RELEASE SW SIG PARK BRK RELEASE SW VOL REF PARK BRK SW SPLY VOLT PARKING BRAKE CONTROL MODULE (BEHIND LEFT REAR WHEEL LINER) RED WIRE RIGHT FRONT FOG LAMP UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/GRY WIRE WHT WIRE WHT/BRN WIRE YEL WIRE YEL/RED 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