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

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

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

BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/GRY WIRE BLK/LT GRN WIRE BLK/VIO WIRE BLU/YEL WIRE CNRK POS SENS SIG CRANKSHAFT POSITION SENSOR (RIGHT SIDE OF ENGINE) DK BLU/VIO WIRE DK BLU/WHT WIRE ECT SENS SIG ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE SENSOR (BEHIND EXHAUST MANIFOLD) ENGINE OIL PRESSURE SWITCH (FRONT OF ENGINE) EXHAUST BANK 1 SIG EXHAUST CAMSHAFT POSITION SENSOR (RIGHT REAR OF ENGINE BELOW CAMSHAFT COVER) GRY/DK BLU WIRE GRY/YEL WIRE HIGH CTRL HIGH PRESSURE FUEL PUMP IC 1 CTRL IC 2 CTRL IC 3 CTRL IC 4 CTRL INTAKE BANK 1 SIG INTAKE CAMSHAFT POSITION SENSOR (LEFT FRONT CORNER OF CYLINDER HEAD) LOW CTRL LOW REF LT BLU WIRE LT GRN WIRE LT GRN/DK BLU WIRE NCA WIRE OIL PRESSURE SW SIG SPARK PLUG VIO/BLK WIRE VIO/DK BLU WIRE VIO/GRY WIRE YEL WIRE YEL/DK BLU WIRE YEL/VIO WIRE

5-V REF 4 ACTUATOR CTRL CLOSE SENS LOW REF ACTUATOR CTRL OPEN AIR TEMP SENS SIG BANK 1 SENS (1) BANK 1 SENS (2) MAP SENS SIG 5-V REF 3 BANK 1 SENS 1 BANK 1 SENS 2 BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/LT GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/WHT WIRE BRN WIRE BRN/RED WIRE BRN/WHT WIRE DK BLU/WHT WIRE ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) FRP SENS SIG GROUND GRY WIRE GRY/DK BLU WIRE GRY/RED WIRE GRY/WHT WIRE KNOCK SENS SIG KNOCK SENSOR (LEFT OF EXHAUST MANIFOLD) LOW REF LOW REF TP SENS SIG LOW SIG BANK 1 SENS (1) LOW SIG BANK 2 SENS (2) LT GRN/DK BLU WIRE LT GRN/WHT WIRE MANIFOLD ABSOLUTE PRESSURE SENSOR (TOP OF INTAKE MANIFOLD) MASS AIR FLOW/INTAKE AIR TEMPERATURE SENSOR (TOP OF AIR CLEANER HOUSING) PARK/NEUTRAL SIG STARTING/CHARGING SYSTEM TRANSMISSIONS SYSTEM VIO/DK BLU WIRE VIO/GRY WIRE WHT/BLK WIRE WHT/BRN WIRE WHT/DK BLU WIRE WHT/GRY WIRE WHT/YEL WIRE YEL WIRE

ACC WAKEUP SERIAL DATA BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/GRN WIRE BLK/LT GRN WIRE BLK/YEL WIRE BLU WIRE BLU/BRN WIRE BLU/VIO WIRE BLU/WHT WIRE BRAKE PEDAL POSITION SENSOR (NEAR TOP OF ACCELERATOR PEDAL ASSEMBLY) BRAKE POSITION SNSR LO REF BRN/RED WIRE BRN/WHT WIRE CHARGING SYSTEM COMPUTER COMPUTER DATA LINES SYSTEM CONTROL SYSTEM COOLING CRUISE CRUISE/ETC/TCC BRAKE SIG DATA COMM ENABLE DATA LINES DK BLU WIRE DK BLU/BRN WIRE DK BLU/GRN WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE ECM (LEFT FRONT OF ENGINE COMPT) ENGINE CONTROL MODULE EVAP CANISTER VENT SOL CTRL FANS SYSTEM FLP SENS LOW REF FPP RLY CTRL FRP SNSR (5) VOLT REF FRP SNSR SIG FUEL PUMP SPLY VOLT FUEL RAIL PRESSURE SENSOR (TOP OF ENGINE ON FUEL RAIL) GRN/GRY WIRE GRN/VIO WIRE GROUND GRY WIRE GRY/BLK WIRE GRY/DK BLU WIRE HI SIG BANK 1 SENS (1) HI SIG BANK 1 SENS (2) HI SIG BANK 2 SENS 1 HI SIG BANK 2 SENS 2 HOT AT ALL TIMES BATTERY FUSE BLOCK (TOP OF BATTERY) FUSE 5 HUMIDITY SNSR SIG IGNITION 1 VOLTAGE LO SIG BANK 1 SENS 1 LO SIG BANK 1 SENS 2 LO SIG BANK 2 SENS 1 LO SIG BANK 2 SENS 2 LO SPD C/FAN RLY CTRL LOW REF LT GRN/DK BLU WIRE NCA WIRE POWERTRAIN RLY COIL CTRL PRESS SENS SIG PWR MAIN RLY FUSED SPLY (2) PWR MAIN RLY FUSED SPLY 3 RED WIRE RED/BRN WIRE RED/VIO WIRE RELAY COIL CTRL RUN/CRNK IGN 1 VOLT SERIAL DATA SHIELD EXTENSION SHUTTER VALVE SOL CTRL SNSR LO REF SNSR SIG STARTER ENABLE RLY CTRL STARTING/ SUPPLY VOLT SYSTEM TAN WIRE THROTTLE ACTUATOR CTRL CLOSE VIO/BLK WIRE VIO/DK BLU WIRE VIO/GRY WIRE VIO/LT GRN WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/DK BLU WIRE WHT/GRN WIRE WHT/RED WIRE WHT/YEL WIRE YEL WIRE YEL/DK BLU WIRE YEL/WHT WIRE

3 1 2 IGN CTRL GND ACTIVE GRILLE AIR SHUTTER ACTUATOR (LEFT SIDE OF FRONT BUMPER LOWER GRILLE) BANK 1 SENSOR 1 HEATED OXYGEN SENSOR (REAR OF ENGINE IN BANK 1 EXHAUST MANIFOLD) BANK 1 SENSOR 2 HEATED OXYGEN SENSOR (DOWNSTREAM OF CATALYTIC CONVERTER) BANK 2 SENSOR 1 HEATED OXYGEN SENSOR (REAR OF ENGINE IN BANK 2 EXHAUST MANIFOLD) BANK 2 SENSOR 2 HEATED OXYGEN SENSOR (DOWNSTREAM OF CATALYTIC CONVERTER) BDY RC IGN FUSE BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/VIO WIRE BLK/WHT WIRE BRN/WHT WIRE BRN/YEL WIRE DK BLU WIRE DK BLU/BRN WIRE DK BLU/YEL WIRE ECM COOLING FAN HIGH SPEED RELAY BATT FUSE ENGINE CONTROLS IGNITION RELAY FSCM FUSE GRY/BLK WIRE GRY/DK BLU WIRE GRY/WHT WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INJ INJ ODD EVEN FUSE FUSE LOGIC LT GRN/DK BLU WIRE LT GRN/WHT WIRE LT GRN/YEL WIRE MULTI-FUNCTION INTAKE AIR SENSOR (TOP OF AIR CLEANER HOUSING) NCA WIRE NON ECM WLK VEH FUSE FUSE NON WLK 02 FUSE POWER DISTRIBUTION SYSTEM RED WIRE RED/BRN WIRE RED/LT GRN WIRE RED/VIO WIRE SAIR PUMP FUSE SECONDARY AIR INJECTION PUMP RELAY TO SECONDARY AIR INJECTION SOLENOID VALVE RELAY (DIAGRAM 4 OF 7) TRN ECM FSC IGN CANN IGN FUSE VENT FUSE FUSE UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/BLK WIRE VIO/DK BLU WIRE VIO/GRY WIRE VIO/LT GRN WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/BRN WIRE WHT/DK BLU WIRE WHT/RED WIRE WHT/YEL WIRE YEL WIRE YEL/DK BLU WIRE YEL/WHT WIRE

A/C COMPRESSOR CLUTCH RELAY AUXILIARY HEATER COOLANT PUMP RELAY AUXILIARY/ ELECTRIC TRANSMISSION FLUID PUMP RELAY BLK/BRN WIRE BLK/DK BLU WIRE BLK/GRY WIRE BLK/LT GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE CHARGE INDICATOR CTRL COOLING FAN LOW SPEED RELAY DK BLU WIRE DK BLU/BRN WIRE DK BLU/GRY WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE ECM (LEFT FRONT OF ENGINE COMPT) ENGINE CONTROL MODULE EVAP CANISTER PURGE SOL CTRL FAN RLY A FROM ENGINE CONTROLS IGNITION RELAY (DIAGRAM 3 OF 7) FUSE GEN FIELD DUTY CYCLE SIG GRY WIRE GRY/DK BLU WIRE GRY/RED WIRE GRY/WHT WIRE HI VOLT SPLY CYL 1 HI VOLT SPLY CYL 2 HI VOLT SPLY CYL 3 HI VOLT SPLY CYL 4 HI VOLT SPLY CYL 5 HI VOLT SPLY CYL 6 HOT AT ALL TIMES INDUCTION AIR TEMP SNSR SIG INTAKE AIR TEMP SNSR LO REF KNOCK SNSR LO REF (1) KNOCK SNSR LO REF (2) KNOCK SNSR SIG (1) KNOCK SNSR SIG (2) LO CTRL BANK 1 SNSR (1) LO CTRL BANK 1 SNSR (2) LO CTRL BANK 2 SNSR (1) LO CTRL BANK 2 SNSR (2) LT GRN/DK BLU WIRE LT GRN/GRY WIRE LT GRN/WHT WIRE LT GRN/YEL WIRE MAP SNSR LO REF MAP SNSR SIG MASS AIR FLOW SNSR SIG RED/GRN WIRE RED/LT GRN WIRE SAIR SOL FUSE SECONDARY AIR INJECTION SOLENOID VALVE RELAY SIGNAL GROUND STARTING/ CHARGING SYSTEM SW SIG THROTTLE ACTUATOR CTRL OPEN THROTTLE POSITION SNSR THROTTLE SENS LO REF TR PARK/NEUTRAL SIG (1) TRANS- MISSIONS SYSTEM VIO/DK BLU WIRE VIO/GRY WIRE WHT WIRE WHT/BRN WIRE WHT/DK BLU WIRE WHT/GRY WIRE YEL WIRE

BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/GRY WIRE BLK/WHT WIRE BLK/YEL WIRE BRN WIRE BRN/GRN WIRE BRN/WHT WIRE DK BLU WIRE DK BLU/GRY WIRE DK BLU/VIO WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE OIL LEVEL SWITCH (LOWER RIGHT FRONT SIDE OF ENGINE, MOUNTED TO OIL PAN) FUEL INJECTORS (TOP OF ENGINE) GRY/DK BLU WIRE LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/DK BLU WIRE LT GRN/GRY WIRE LT GRN/WHT WIRE NCA WIRE PPL PPL/WHT WIRE SECONDARY AIR INJECTION BANK 1 SOLENOID VALVE (LEFT OF EXHAUST PORT) SECONDARY AIR INJECTION BANK 2 SOLENOID VALVE (LEFT OF EXHAUST PORT) SPARK PLUG VIO/DK BLU WIRE VIO/GRY WIRE VIO/LT GRN WIRE WHT/BRN WIRE WHT/GRY WIRE WHT/LT GRN WIRE