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

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

13 14 6 15 14 5 ACCESSORY WAKEUP SERIAL DATA SER DATA (-) 1 SER DATA (+) 1 2.4L 3.6L 5 17 SER DATA (+) 1 SER DATA (-) 1 6 18 SER DATA (+) 1 SER DATA (-) 1 8 7 12 2 HS SERIAL DATA - HS SERIAL DATA + BATTERY ENERGY CONTROL MODULE BLU WIRE BLU/BLK WIRE BLU/YEL WIRE COMM ENABLE CONTROL SOLENOID VALVE ASSEMBLY AUTOMATIC TRANSMISSION ASSEMBLY DATA COM ENABLE DK BLU WIRE DK BLU/GRY WIRE DK BLU/YEL WIRE DOOR HARNESS) ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) GRY WIRE HIGH SERIAL DATA HS SERIAL DATA - HYDRID/EV BATTERY PACK LOW SERIAL DATA LT GRN/BLK WIRE PNK/BLK WIRE POWER STEERING CONTROL MODULE (LOWER LEFT SIDE OF DASH) SER DATA (-) (1) SER DATA - (3) SERIAL DATA SERIAL DATA ACC WAKEUP STARTER/GENERATOR CONTROL MODULE TAN/WHT WIRE VIO/YEL WIRE W/ BELT DRIVE W/ VARIABLE EFFORT W/O BELT DRIVE W/O VARIABLE EFFORT OR BELT DRIVE WHT WIRE WHT/BLU WIRE WHT/DK BLU WIRE WHT/YEL WIRE YEL WIRE YEL/BLK WIRE

135 MM FROM BREAKOUT TO 6105 6105 6106 6106 COMPUTER DATA LINES SYSTEM AWD/SADS FUSE BLK WIRE BLK/BRN WIRE BLU WIRE BLU/BLK WIRE BLU/YEL WIRE BRN WIRE BRN/DK BLU WIRE BRN/LT GRN WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/GRY WIRE DK GRN/GRY WIRE DRIVER INFORMATION CENTER DISPLAY GMLAN SER DATA (+) GMLAN SER DATA (+) GMLAN SER DATA (-) GMLAN SER DATA (-) GRN WIRE GRN/RED WIRE GRY/BLU WIRE GRY/DK BLU WIRE GRY/RED WIRE GRY/WHT WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT FRONT SHOCK ABSORBER ACTUATOR LEFT FRONT VERTICAL BODY ACCELERATION SENSOR (LEFT FRONT STRUT TOWER) LEFT REAR SHOCK ABSORBER ACTUATOR LF WHL ACC LOW REF LOGIC LT GRN WIRE LT GRN/GRY WIRE LT GRN/VIO WIRE NCA WIRE ORG/ WIRE PACK) PNK/BLK WIRE REAR VERTICAL BODY ACCELERATION SENSOR (FRONT OF REAR COMPT) RED/GRY WIRE RIGHT FRONT SHOCK ABSORBER ACTUATOR RIGHT FRONT VERTICAL BODY ACCELERATION SENSOR (RIGHT FRONT STRUT TOWER) RIGHT REAR SHOCK ABSORBER ACTUATOR SUSPENSION CONTROL MODULE (LEFT CORNER OF REAR COMPT) UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE WHT WIRE WHT/BRN WIRE WHT/DK BLU WIRE WHT/VIO WIRE WHT/YEL WIRE YEL WIRE YEL/RED BLK/BRN WIRE YEL/RED 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

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

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

APPLY SW SIG RELEASE SW SIG BLK WIRE BLU WIRE BLU/BLK WIRE BLU/VIO WIRE BRN WIRE COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM 6107 6108 DRIVER INFORMATION CENTER DISPLAY EPB FUSE GRN WIRE GRY WIRE GRY/RED WIRE HI SPD GMLAN - HI SPD GMLAN - HI SPD GMLAN - SUPPLY VOLTAGE SERIAL DATA HOT AT ALL TIMES INSTRUMENT CLUSTER LOGIC LOW SPD GMLAN PARK BRAKE CONTROL SWITCH (ON PARK BRAKE ASSEMBLY) PARK IND PARKING BRAKE CONTROL MODULE (BEHIND LEFT REAR WHEEL LINER) RED WIRE RED/VIO WIRE SERIAL DATA UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE YEL WIRE YEL/RED WIRE

AJAR AJAR SW SIG BCM 7 FUSE BLOCK FUSE (LOWER LEFT SIDE OF DASH) BLK WIRE BLK/ORG WIRE BLU WIRE BLU/ WHT WIRE BLU/BLK WIRE BLU/VIO WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRAKE IND BRN WIRE BRN/GRN WIRE BUS 4 COMPUTER DATA LINES SYSTEM DK BLU RED/ WIRE DLIS FUSE DRIVER DOOR LATCH ASSEMBLY DRIVER INFORMATION CENTER DISPLAY DRIVER SEAT BELT BUCKLE DRIVER SEAT BELT SWITCH DRIVER WINDOW MOTOR DRIVER WINDOW SWITCH DRIVER'S DOOR GMLAN SER DATA RADIO GMLAN SERIAL DATA GRN WIRE GRN/GRY WIRE GROUND GRY WIRE GRY/ GRN WIRE GRY/RED WIRE HEAD PARK 5 6 AUTO OFF HEADLAMP SW 22 11 1 PRK LAMP SIG OFF SIG HEADLAMP SWITCH HOT AT ALL TIMES INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) (BELOW CENTER CONSOLE) INSTRUMENT CLUSTER INSTRUMENT PANEL LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR WINDOW SWITCH LO SPD GMLAN SER DATA LOGIC LOW ENGINE OIL PRESSURE IND LOW SPD GMLAN SER DATA SER DATA COMMUNICATION ENABLE LOW TIRE PRESSURE IND LT GRN/GRY WIRE LT GRN/YEL WIRE NCA WIRE NETWORK NETWORK BUS 3 NETWORK BUS 4 OFF KEY IGNITION SWITCH IGNITION SWITCH (W/O KEYLESS ENGINE START SWITCH) OFF/RUN/ CRANK VOLT ORG/BRN WIRE PARK BRAKE CONTROL SWITCH (ON PARK BRAKE ASSEMBLY) PARKING BRAKE CONTROL MODULE (BEHIND LEFT REAR WHEEL LINER) PASSENGER DOOR LATCH ASSEMBLY PASSENGER WINDOW MOTOR (FRONT PASSENGER'S DOOR) PRK BRK APPLY SW VOLT REF PRK BRK SW SUP VOLT PRK BRK SW SIG PRK BRK SW SUPP VOLT PRK BRK SW RELEASE SIG PRK BRK SW APPLY SIG RED WIRE RED/DK BLU WIRE RED/LT GRN (OR RED/GRN) WIRE RED/LT GRN WIRE RIGHT REAR DOOR LATCH ASSEMBLY RIGHT REAR WINDOW SWITCH RUN WIRE SEAT BELT IND SEAT BELT SW LOW REF SEAT BELT SW SIG SER DATA LVL COMM SENS ENABLE SIG SERIAL DATA COMM ENABLE SPLICE PACK) (LEFT KICK PANEL) SW SIG VIO WIRE WHT WIRE WHT/BLU WIRE WHT/DK BLU WIRE WHT/YEL WIRE YEL WIRE YEL/RED 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