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

518 520 LOWER LEFT AIR TEMP SENS SIG LOWER RIGHT AIR TEMP SENS SIG A/C LOW REF A/C SENS SIG AFTER BOIL HTR RLY CTRL AIR INLET DOOR ACTUATOR (RIGHT SIDE OF HVAC MODULE) AIR RECIRCULATION DOOR ACTUATOR (MOUNTED TO HVAC MODULE) BATT+ VOLT BLK WIRE BLK/BRN WIRE BLK/GRY WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BRN/GRN WIRE BRN/RED WIRE BRN/YEL WIRE CMPRSR CLUTCH RLY CTRL COMPUTER DATA LINES SYSTEM DK BLU WIRE ENG TEMP SENS SIG ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) GMLAN SERIAL DATA GRN WIRE GRN/WHT WIRE GRY WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/RED WIRE GRY/WHT WIRE HI SPD FAN RLY CTRL HVAC CONTROL MODULE LEFT AIR TEMPERATURE DOOR ACTUATOR (LEFT SIDE OF HVAC ASSEMBLY) LO SPD FAN RLY CTRL LOGIC LT GRN WIRE LT GRN/VIO WIRE MODE DOOR ACTUATOR (LOWER LEFT SIDE OF HVAC ASSEMBLY) ORG/BLU WIRE PNK WIRE PPL/BLK WIRE RED/BLK WIRE RED/BLU WIRE RED/BRN WIRE RED/GRN WIRE RIGHT AIR TEMPERATURE DOOR ACTUATOR (RIGHT SIDE OF HVAC MODULE) SENS LO REF SENS LOW REF SIG GND VIO/GRY WIRE WHT WIRE WHT/GRY WIRE WHT/PNK WIRE WHT/RED WIRE WHT/VIO WIRE YEL WIRE YEL/GRN WIRE YEL/GRY WIRE YEL/RED 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

30 MM FROM BREAKOUT TO ACCESSORY DC/AC POWER INVERTER MODULE BLK WIRE CENTER CONSOLE 1 ACCESSORY POWER RECEPTACLE CENTER CONSOLE 2 ACCESSORY POWER RECEPTACLE CENTER CONSOLE COMPARTMENT ACCESSORY POWER RECEPTACLE CENTER CONSOLE COMPARTMENT LAMP SWITCH CENTER CONSOLE CUPHOLDER ACCENT LAMP CENTER CONSOLE MULTI-FUNCTION SWITCH DATA LINK CONNECTOR INSTRUMENT PANEL COMPARTMENT LAMP INSTRUMENT PANEL MULTI-FUNCTION SWITCH 2 LEFT INSTRUMENT PANEL COURTESY LAMP LEFT STEERING WHEEL CONTROLS SWITCH NCA WIRE PARK BRAKE CONTROL SWITCH PARK POSITION SWITCH PASSENGER INSTRUMENT PANEL AIR BAG PNK WIRE RIGHT INSTRUMENT PANEL ACCENT LAMP RIGHT INSTRUMENT PANEL COURTESY LAMP RIGHT STEERING WHEEL CONTROLS HORN ACCENT SWITCH SWITCH LAMP STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATER STEERING WHEEL HEATING CONTROL MODULE TO GROUND TRANSMISSION MANUAL SHIFT SWITCH TRANSMISSION SHIFT LEVER TRANSMISSION SHIFT LOCK CONTROL SOLENOID ACTUATOR W/ CUSTOM INTERIOR PACKAGE LAMP W/ ELECTRICAL FRONT CONSOLE

BATTERY FUSE BLOCK (TOP OF BATTERY) BLK WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN/GRY WIRE BRN/WHT WIRE FUSE 5 GRN/WHT WIRE GROUND DISTRIBUTION SYSTEM PNK WIRE HORN ASSEMBLY (RIGHT FRONT OF VEHICLE) HORN FUSE HORN RELAY HORN RLY CTRL HORN SW SIG HORN SWITCH HOT AT ALL TIMES NCA WIRE PNK PNK WIRE PNK WIRE RED WIRE RIGHT STEERING WHEEL CONTROLS SWITCH STEERING WHEEL AIR BAG COIL UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY)

22 1 SERIAL DATA BATT POS VOLT AIR BAG COIL AUTO BCM 3 FUSE BLK WIRE BLK/DK BLU WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) CENTER CONSOLE MULTI-FUNCTION SWITCH COMPUTER DATA LINES SYSTEM CRUISE CONTROL, SOUND SYSTEMS DIMMER SWITCH DK BLU WIRE DOME LAMP SWITCH DRIVER DOOR LOCK SWITCH DRIVER SEAT MEMORY SWITCH (W/ MEMORY) FOG LAMP SWITCH GARAGE DOOR OPENER SUNROOF SUNSHADE GRN WIRE HDLP SW PARK LP SIG HEAD HEAD-UP DISPLAY SWITCH (IF EQUIPPED) HEADLAMP SWITCH HORN SWITCH HOT AT ALL TIMES IGNITION MODE SWITCH (W/ KEYLESS ENGINE INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) LED BACK LEFT FRONT DOME/ READING LAMPS LEFT STEERING WHEEL CONTROLS SWITCH LEFT TAILLAMP ASSEMBLY LIGHT CTRL SW REF LIGHT CTRL SW SIG LIGHT DIMMING CONTROL LOW REF LT GRN WIRE OFF ORG/VIO WIRE OUTSIDE REARVIEW MIRROR SWITCH (W/O MEMORY) PARK PARKING ASSIST ON/ OFF SWITCH (W/ REAR PARKING ASSIST) PARKING BRAKE CONTROL SWITCH (BEHIND LEFT REAR WHEEL LINER) PASSENGER DOOR LOCK SWITCH PASSENGER WINDOW SWITCH PNK WIRE REAR DOME READING LAMPS REAR WINDOW SUNSHADE SWITCH (IF EQUIPPED) RED/WHT WIRE RIGHT FRONT DOME/ READING LAMPS RIGHT STEERING WHEEL CONTROLS SWITCH SEAT MEMORY CONTROL MODULE (W/ MEMORY) (UNDER DRIVER'S SEAT) SERIAL DATA LOGIC STEERING WHEEL) SUNROOF SWITCH (IF EQUIPPED) SWITCH VIO WIRE W/ MEMORY W/O MEMORY YEL WIRE YEL/BLK WIRE

1 2 SERIAL DATA (-) SERIAL DATA (+) AM/FM AUX AUDIO COM SIG AUX DET SIG BATT + BLK WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/WHT WIRE BUS 12 COAX COMPUTER DATA LINES SYSTEM CTRL GMLAN SERIAL DATA GRN WIRE GRN/BLU WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/VIO WIRE HANG UP IND DIMMING INSTRUMENT CLUSTER LED CTRL LEFT STEERING WHEEL CONTROLS SWITCH LOGIC LOW REF MOST CTRL NCA WIRE NETWORK NETWORK BUS 10 ORG/ WIRE ORG/VIO WIRE PNK 10 4 5 6 WIRE PNK WIRE RADIO RED/BLU WIRE RED/VIO WIRE RIGHT RIGHT STEERING WHEEL CONTROLS SWITCH SEEK + MUTE SEEK+ VOL+ SERIAL DATA SIG SOURCE SPEAK SIG STEERING STEERING WHEEL AIR BAG COIL VIO WIRE VOICE LEFT VOICE SIG VOL (-) WHEEL SW WHT/GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE

1 2 SERIAL DATA (-) SERIAL DATA (+) AM/FM AUX AUDIO COM SIG AUX DET SIG BATT + BLK WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/DK BLU WIRE BRN/WHT WIRE BUS 12 COAX COAX 1 2 3 4 5 6 7 8 9 COMPUTER DATA LINES SYSTEM CTRL DK BLU WIRE DK BLU/BLK WIRE GMLAN SERIAL DATA GRN WIRE GRN/BLU WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/VIO WIRE HANG UP IND DIMMIMG INSTRUMENT CLUSTER LED CTRL LEFT STEERING WHEEL CONTROLS SWITCH LOGIC LOW REF LT FT SPKR 1+ LT FT SPKR SIG 1- LT GRN WIRE LT GRN/BLK WIRE LT RR SPKR LT RR SPKR SIG - MOST CTRL NCA WIRE NETWORK NETWORK BUS 10 ORG/ WIRE ORG/VIO WIRE PNK 10 4 5 6 WIRE PNK WIRE RADIO RED/BLU WIRE RED/VIO WIRE RIGHT RIGHT STEERING WHEEL CONTROLS SWITCH RT FT SPKR 1+ RT FT SPKR SIG 1- RT RR SPKR RT RR SPKR SIG - SEEK SEEK+ VOL+ SERIAL DATA SIG SOURCE MUTE SPEAK SIG STEERING STEERING WHEEL AIR BAG COIL VIO WIRE VOICE LEFT VOICE SIG VOL (-) WHEEL SW WHT WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE

1 2 SERIAL DATA (-) SERIAL DATA (+) AM/FM AUX AUDIO COM SIG AUX DET SIG BATT + BLK WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/WHT WIRE BUS 12 COAX COMPUTER DATA LINES SYSTEM CTRL GMLAN SERIAL DATA GRN WIRE GRN/BLU WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/VIO WIRE HANG UP IND DIMMING INSTRUMENT CLUSTER LED CTRL LEFT STEERING WHEEL CONTROLS SWITCH LOGIC LOW REF MOST CTRL NCA WIRE NETWORK NETWORK BUS 10 ORG/ WIRE ORG/VIO WIRE PNK 10 4 5 6 WIRE PNK WIRE RADIO RED/BLU WIRE RED/VIO WIRE RIGHT RIGHT STEERING WHEEL CONTROLS SWITCH SEEK + MUTE SEEK+ VOL+ SERIAL DATA SIG SOURCE SPEAK SIG STEERING STEERING WHEEL AIR BAG COIL VIO WIRE VOICE LEFT VOICE SIG VOL (-) WHEEL SW WHT/GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/BLU 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