Buick LaCrosse II facelift (2013-2016) blk/yel Wiring diagrams

12 VOLTAGE BRAKE FLUD LVL SENS SIG BRK VACUUM SW SIG SERIAL DATA- SERIAL DATA + 5 VOLT REF BLK WIRE BLK/BLU WIRE BLK/GRY WIRE BLK/VIO WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BLU/YEL WIRE BRAKE BOOSTER PUMP MOTOR RELAY (RIGHT SIDE OF ENGINE COMPT) BRAKE FLUID LEVEL SWITCH (LEFT KICK (ON BRAKE FLUID PANEL) RESERVOIR) BRAKE PRESSURE MODULATOR BRAKE VACUUM SENS SIG WHL SPD SENS SIG LF LF WHL SPD SENS LOW REF BRN WIRE COMPUTER DATA LINES SYSTEM ELECTRONIC BRAKE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) FUSE FUSE 26 FUSE 41 GRN/BRN WIRE GRN/GRY WIRE GRY WIRE HOT AT ALL TIMES LEFT FRONT WHEEL SPEED SENSOR (LEFT FRONT STEERING KNUCKLE ASSEMBLY) LEFT REAR WHEEL SPEED SENSOR (LEFT REAR UPPER CONTROL ARM) LOW REFERENCE BATTERY + RED WIRE RED/BLU WIRE RED/GRY WIRE RED/YEL WIRE RIGHT FRONT WHEEL SPEED SENSOR SENS SIG RIGHT REAR LOW REF RIGHT REAR SERIAL DATA + SERIAL DATA - SERIAL DATA - SERIAL DATA + WHL SPD SENS SIG RF WHL SPD SENS LOW RF SERIAL DATA ENABLE WHL SPD SENS SIG LR WHL SPD SENS LOW REF LR UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE W/ CONTINUOUSLY VARIABLE REAL TIME DAMPING CHASSIS W/O CONTINUOUSLY VARIABLE REAL TIME DAMPING CHASSIS WHT WIRE WHT/BLU WIRE YEL WIRE YEL/RED WIRE YEL/VIO WIRE

2.4L 24 25 GMLAN SERL DATA (+) GMLAN SERL DATA (-) 3.6L 5 VOLT REF 7 13 SENS SIG SPLY VOLT ABS IND. BLK WIRE BLK/BRN WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/VIO WIRE BLU/YEL WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRAKE IND BRAKE PEDAL POSITION SENSOR (NEAR TOP OF ACCELERATOR BRN WIRE CENTER CONSOLE MULTI-FUNCTION SWITCH COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEMS DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT) ESC OFF IND GRN WIRE GRN/BRN WIRE GRY WIRE GRY/RED WIRE HI SPD GMLAN HI SPD GMLAN SERIAL DATA HI SPD GMLAN SERIAL DATA (-) (2) HYBRID/EV BATTERY PACK (RIGHT SIDE OF LUGGAGE COMPT) HYBRID/EV POWERTRAIN CONTROL MODULE INSTRUMENT CLUSTER LOGIC LOW REF LT GRN/BLK WIRE PARK BRAKE CONTROL SWITCH (ON PARK BRAKE ASSEMBLY) PARKING BRAKE CONTROL MODULE (BEHIND LEFT REAR WHEEL LINER) PEDAL ASSEMBLY) SENS SIG SRL DATA BUS+ STEERING ANGLE SENSOR (BASE OF STEERING COLUMN) SUPPLY VOLT SUPPLY VOLTAGE SW SIG TCS/ ESC IND TRACTION CONTROL OFF IND TRACTION CONTROL SWITCH VIO WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/RED WIRE

2.4L HYBRID 3.6L 5382 5380 5381 68 48 47 LOW REF BRAKE POS SENS SIG 7 13 BRAKE APPLY SENS SIG SUPPLY VOLTAGE ACTUATOR CTRL CLOSE ACTUATOR CTRL OPEN ADAPTIVE CRUISE SWITCH BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/WHT WIRE BLU/YEL WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRAKE PEDAL POSITION SENSOR (NEAR TOP OF ACCELERATOR PEDAL ASSEMBLY) BRN/LT GRN WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CRUISE CONTROL SW SIG CRUISE SWITCH CRUISE/ETC/TCC BRK SIG ECM IGN FUSE ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) GMLAN SERIAL DATA GMLAN SERIAL DATA - 34 70 54 2701 3630 2752 GRN WIRE GRN/WHT WIRE GROUND GRY WIRE HEADLIGHTS SYSTEM HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IPC FUSE LEFT STEERING WHEEL CONTROLS SWITCH LIGHTING CTRL SW REF LOGIC LOW REF LOW REF 2 POSITIVE VOLTAGE RED/BLK WIRE RED/WHT WIRE RES+ SENS SIG LOW REF SET- SIG 1 LOW REF 1 SIG 2 STEERING WHEEL AIR BAG COIL UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/LT GRN WIRE W/ ADAPTIVE CRUISE CONTROL W/O ADAPTIVE CRUISE CONTROL WHT WIRE WHT/DK BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/WHT WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 BATT POS VOLT 3 7 HI SPD GMLAN (+) HI SPD GMLAN (-) 3.6L 2.4L HYBRID ACCELERATOR PEDAL POSITION SENSOR (LEFT SIDE OF DASH) BLK WIRE BLK/BLU WIRE BLK/VIO WIRE BLK/YEL WIRE BRK POS SENS SIG LOW REF BRN/RED WIRE COMM ENABLE COMPUTER DATA LINES COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY AUTOMATIC TRANSMISSION ASSEMBLY CRUISE IND DISTANCE SENSING CRUISE CONTROL MODULE (BEHIND UPPER GRILLE OPENING) DK BLU WIRE DK BLU/YEL WIRE DRIVER INFORMATION CENTER DISPLAY GRN/WHT WIRE GROUND HOT AT ALL TIMES HYBRID/EV BATTERY PACK (RIGHT SIDE OF LUGGAGE COMPT) HYBRID/EV POWERTRAIN CONTROL MODULE INSTRUMENT CLUSTER LOGIC LRR LDW FUSE MOST SERIAL DATA (+) POSITIVE VOLTAGE RED/BLK WIRE RED/GRY WIRE SER DATA (-) SER DATA (+) SER DATA (-) SER DATA (+) STARTER/GENERATOR CONTROL MODULE SYSTEM TRANSMISSION CONTROL MODULE TRANSMISSION INPUT SHAFT SPEED SENSOR TRANSMISSION OUTPUT SHAFT SPEED SENSOR UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) WHT WIRE WHT/DK BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/WHT WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 BATTERY SOL CTRL 1 2 3 4 5 6 DATA (-) DATA (-) DATA (+) DATA (+) VOLT GND 2.4L 3.6L 9 8 17 DATA + DATA - SPLY VOLT ANTI-LOCK BRAKES SYSTEM AUTOMATIC TRANSMISSION ASSEMBLY BLK WIRE BLK/YEL WIRE BLU WIRE BLU/YEL WIRE BRN/GRN WIRE BRN/LT GRN WIRE COMPUTER DATA LINES COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY DK BLU WIRE DRIVER INFORMATION CENTER DISPLAY ELECTRONIC BRAKE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) FUSE GRN WIRE GRN/BRN WIRE HOT AT ALL TIMES IGN INSTRUMENT CLUSTER LOGIC POWER STEERING CONTROL MODULE (LOWER LEFT SIDE OF DASH) RED WIRE RED/DK BLU WIRE SERIAL DATA (-) SERIAL DATA (+) SHAFT SPEED SENSOR SOL LO REF STEERING ANGLE SENSOR (BASE OF STEERING COLUMN) SYSTEM TRANS- MISSION OUTPUT TRANSMISSION CONTROL MODULE (TCM) UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) W/ ADAPTIVE CRUISE CONTROL WHT WIRE WHT/DK BLU WIRE

4 6 NETWORK BUS 3 AJAR SW SIG ACTR RECEIVE SIG ACTR RTN ACTR SPLY VOLT ACTR TRANSMIT SIG AJAR SW SIG ANT LO REF (2) ANT LO REF (5) ANT SIG (1) ANT LO REF (1) ANT SIG (2) ANT SIG (5) BLK WIRE BLK/BRN WIRE BLK/LT GRN WIRE BLK/YEL WIRE BLU WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM LOGIC DK BLU WIRE DK BLU/VIO WIRE DRIVER DOOR LATCH ASSEMBLY DRIVER EXTERIOR DOOR HANDLE SWITCH DRIVER INFORMATION CENTER DISPLAY SECURITY IND DRIVER WINDOW MOTOR (DRIVER'S DOOR) DRIVER WINDOW SWITCH GMLAN SERIAL DATA GRN WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE GRY/DK BLU WIRE GRY/YEL WIRE INSTRUMENT CLUSTER KEYLESS ENTRY ANTENNA KEYLESS ENTRY CONTROL MODULE (RIGHT KICK PANEL) LEFT REAR EXTERIOR DOOR HANDLE ASSEMBLY LEFT REAR EXTERIOR DOOR HANDLE SWITCH LT GRN WIRE LT GRN/WHT WIRE LT GRN/YEL WIRE NETWORK BUS 3 ORG/ WIRE PACK) PASS DR UNLATCH SW SIG DRV DR UNLATCH SW SIG PASSENGER DOOR HANDLE KEYLESS ENTRY ANTENNA PASSENGER EXTERIOR DOOR HANDLE SWITCH PASSENGER WINDOW MOTOR (FRONT PASSENGER'S DOOR) REAR FASCIA KEYLESS ENTRY ANTENNA (IF EQUIPPED) (BEHIND REAR BUMPER) RED WIRE REMOTE CONTROL DOOR LOCK RECEIVER (ON PASSENGER SIDE C-PILLAR) RIGHT REAR EXTERIOR DOOR HANDLE ASSEMBLY RIGHT REAR EXTERIOR DOOR HANDLE SWITCH STATUS CTRL UNLOCK SIGNAL VIO WIRE VIO/GRY WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE YEL/DK BLU WIRE

A/C COMPRESSOR CLUTCH RELAY ACTIVE GRILLE AIR SHUTTER ACTUATOR (LEFT SIDE OF FRONT BUMPER LOWER GRILLE) AUXILIARY HEATER COOLANT PUMP RELAY AUXILIARY/ ELECTRIC TRANSMISSION FLUID PUMP RELAY BLK WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/YEL WIRE BLU WIRE BLU/BRN WIRE BLU/WHT WIRE BLU/YEL WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CANN VENT FUSE CHASSIS CONTROL MODULE (REAR COMPT, RIGHT REAR CORNER, BEHIND TRIM PANEL) COMMUNICATION ENABLE COMPUTER DATA LINES SYSTEM COOLING FAN HIGH SPEED RELAY DK BLU WIRE DK BLU/BRN WIRE ECM BATT FUSE ECM IGN FUSE FLP SENS FPP RLY CTRL FROM ENGINE CONTROL IGNITION RELAY (DIAGRAM 4 OF 5) FSCM FUSE FUEL PRESSURE SENSOR (IN FUEL TANK) GMLAN SERIAL DATA DRIVER INFORMATION CENTER (DIC) DISPLAY GRN WIRE GRN/GRY WIRE GROUND GRY WIRE GRY/BLK WIRE GRY/DK BLU WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGN IGN 1 VOLT IGN OIL PRESSURE IND MIL IND INSTRUMENT CLUSTER LOGIC LOGIC LOW REF LT GRN/DK BLU WIRE NCA WIRE PRESS SENS SIG RED/BRN WIRE RED/LT GRN WIRE RED/VIO WIRE RUN/CRANK SAIR PUMP FUSE SAIR SOL FUSE SECONDARY AIR INJECTION PUMP RELAY SECONDARY AIR INJECTION SOLENOID VALVE RELAY SERIAL DATA SHIELD EXTENSION SHUTTER VALVE SOL CTRL SPLY VOLT FUEL PUMP TRN BDY FSC RC IGN IGN FUSE FUSE VIO/BLK WIRE VIO/DK BLU WIRE VIO/GRY WIRE VIO/LT GRN WIRE WHT WIRE WHT/BLU WIRE YEL 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

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