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

2 1 LR DOOR AJAR SW SIG NETWORK BUS 4 6 5 RR DOOR AJAR SW SIG NETWORK BUS 4 AJAR SW SIG BLK WIRE BRN WIRE CENTER CONSOLE CUPHOLDER ACCENT LAMP COMPUTER DATA LINES SYSTEM DRIVER DOOR HANDLE FLOOD LAMP DRIVER DOOR LATCH ASSEMBLY DRIVER DOOR PULL HANDLE FLOOD LAMP GRN/YEL WIRE GROUND DISTRIBUTION GRY WIRE HANDLE FLOOD LAMP LEFT INSTRUMENT PANEL ACCENT LAMP LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR DOOR PULL HANDLE LAMP LEFT REAR WINDOW SWITCH LEFT TAILLAMP ASSEMBLY LT GRN/GRY WIRE LT GRN/YEL WIRE NCA WIRE NETWORK BUS 3 OVERHEAD CONSOLE ACCENT LAMP PASSENGER DOOR LATCH ASSEMBLY PASSENGER DOOR) PASSENGER LEFT REAR DOOR DOOR PULL HANDLE FLOOD LAMP HANDLE FLOOD LAMP RED WIRE RIGHT INSTRUMENT PANEL ACCENT LAMP RIGHT REAR DOOR HANDLE FLOOD LAMP RIGHT REAR DOOR PULL HANDLE LAMP RIGHT REAR DOOR LATCH ASSEMBLY RIGHT REAR WINDOW SWITCH SYSTEM W/ CUSTOM INTERIOR PACKAGE LAMP WHT WIRE WHT/YEL WIRE YEL/ WHT 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

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

1 2 BATTERY POSITIVE VOLTAGE BATTERY POSITIVE VOLTAGE B+ FWD BLK WIRE BLU/VIO WIRE BLU/YEL WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DRIVER SEAT FRONT VERTICAL MOTOR (UNDER RIGHT FRONT CORNER OF DRIVER SEAT) DRIVER SEAT HORIZONTAL MOTOR (UNDER DRIVER'S SEAT) DRIVER SEAT LUMBAR SUPPORT VALVE ASSEMBLY DRIVER SEAT REAR VERTICAL MOTOR (UNDER RIGHT REAR CORNER OF DRIVER SEAT) DRIVER SEAT RECLINE MOTOR (LOWER RIGHT SIDE OF DRIVER SEAT BACK) DRVR/SEAT CIRCUIT BREAKER FRONT VERTICAL MTR DWN CTRL FRONT VERTICAL MTR UP CTRL GRN WIRE GRN/BRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLU WIRE GRY/GRN WIRE HORIZONTAL MTR FORWARD CTRL HORIZONTAL MTR REARWARD CTRL HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) LINEAR INTERCONNECT NETWORK BUS 8 LOGIC LOW SPEED GMLAN SERIAL DATA 1 2 3 4 5 6 MEM ST FUSE REAR VERTICAL MTR DOWN CTRL REAR VERTICAL MTR UP CTRL RECLINE MTR FORWARD CTRL RECLINE MTR REARWARD CTRL RED/GRN WIRE RED/YEL WIRE RWD DN UP SEAT MEMORY CONTROL MODULE (UNDER DRIVER'S SEAT) UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) WHT WIRE WHT/BLK WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/WHT WIRE

1 2 3 4 5 6 7 8 9 10 11 12 BATT 1 2 3 4 5 6 7 8 9 10 11 12 GND AUDIO/VIDEO INPUT ADAPTER BK USB BLK WIRE BLU/VIO WIRE BRN WIRE BRN/GRY WIRE COMPUTER DATA LINES SYSTEM DISPLAY FUSE DRIVER SEAT HEADREST VIDEOS DISPLAY GRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/VIO WIRE HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LOGIC LOGIS/MODE FUSE LT RR AUD SIG RT AUX AUD SIG LT AUX AUD SIG AUX HI SIG BATT+ LVDS MEDIA DISC PLAYER MINI FUSE MOST CTRL SERIAL DATA NCA WIRE ONSTAR/ UHP FUSE PASSENGER SEAT HEADREST VIDEOS DISPLAY RDO FUSE RED/BLU WIRE RED/VIO WIRE RT RR AUD SIG RR AUD COM SIG AUX AUD COM SIG AUX LOW SIG USB USB GN WHT WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE

1 2 3 4 5 6 7 8 9 10 11 12 BATT 1 2 3 4 5 6 7 8 9 10 11 12 GND AUDIO/VIDEO INPUT ADAPTER BK USB BLK WIRE BLU/VIO WIRE BRN WIRE BRN/GRY WIRE COMPUTER DATA LINES SYSTEM DISPLAY FUSE DRIVER SEAT HEADREST VIDEO DISPLAY GRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/VIO WIRE HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LOGIC LOGIS/MODE FUSE LT RR AUD SIG RT AUX AUD SIG LT AUX AUD SIG AUX HI SIG BATT+ LVDS MEDIA DISC PLAYER MINI FUSE MOST CTRL SERIAL DATA NCA WIRE ONSTAR/ UHP FUSE PASSENGER SEAT HEADREST VIDEO DISPLAY RDO FUSE RED/BLU WIRE RED/VIO WIRE RT RR AUD SIG RR AUD COM SIG AUX AUD COM SIG AUX LOW SIG USB GN WHT WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE

11 12 IGNITION MODE SW CTRL LOW REFERENCE 22 15 5 6 IGN KEY SIG OFF/RUN/CRANK VOL ACC VOLY RUN/CRANK IGN VOLT 3 4 ACC VOLT RUN/CRANK 1 VOLT 8 20 ACC LED SIG START LED SIG ACC IND AWD/SADS FUSE BLK WIRE BLK/BRN WIRE BLU WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE DK BLU/BLK WIRE ENGINE START/ STOP EXCEPT HYBRID FROM FROM INSTRUMENT PANEL FUSE BLOCK (DIAGRAM 2 OF 5) FUSE (DIAGRAM 2 OF 5) GARAGE DOOR OPENER (IF EQUIPPED) GRN WIRE GRN/VIO WIRE GRN/YEL WIRE GRY WIRE IGNITION MODE SWITCH (W/ KEYLESS ENGINE START) IGNITION SWITCH (W/O KEYLESS ENGINE START) ILL KEY-IN IGNITION SWITCH KEYLESS ENTRY CONTROL MODULE LOGIC HYBRID/ EV BATTERY PACK COOLING FAN LRR LDW FUSE MIR EWL FR FUSE MODE VOL- OBST DETCT FUSE OFF OUTSIDE REARVIEW MIRROR SWITCH P-P BLOWER FUSE PASSENGER WINDOW SWITCH REAR DIFFERENTIAL CLUTCH DRIVER CONTROL WINDOW MODULE SWITCH REAR PARKING LEFT SIDE ASSIST OBJECT CONTROL SENSOR MODULE MODULE (IF EQUIPPED) RED WIRE RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/YEL WIRE RIGHT SIDE OBJECT SENSOR MODULE (IF EQUIPPED) RR HTD ST FUSE RUN WIRE RUN/CRANK RLY COIL CTRL START IND SUSPENSION CONTROL MODULE TO UNDERHOOD FUSE BLOCK (DIAGRAM 2 OF 5) UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/BLK WIRE VIO/YEL WIRE W/ KEYLESS ENGINE START W/ MEMORY W/ SUSPENSION W/O SUSPENSION WHT WIRE YEL WIRE

18 12 RR STATUS SIG LR STATUS SIG 2 18 LOCK CTRL (2) HEADLAMP HI 4 1 UNLOCK CTRL LOCK CTRL 2 4 19 15 POS VOLT LOCK SIG UNLOCK SIG 4 6 NETWORK BUS 3 AJAR SW SIG AJAR SW SIG 1 AMBIENT LIGHT/ SUNLOAD SENSOR (CENTER OF DASH) BCM 8 SIDE OF DASH) FUSE BLK WIRE BM RLY CTRL 25 27 16 RCDLR POWER RCDLR DATA TRANSMIT RCDLR GROUND BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN/LT GRN WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/VIO WIRE DK BLU/WHT WIRE DRIVER DOOR LATCH ASSEMBLY DRIVER DOOR LOCK SWITCH DRIVER WINDOW MOTOR (DRIVER'S DOOR) DRIVER WINDOW SWITCH GRN WIRE GRN/GRY WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/LT GRN WIRE GRY/WHT WIRE HEADLIGHTS SYSTEM HOOD AJAR SW SIG HOOD AJAR SWITCH (FRONT OF ENGINE COMPT) HORN RLY HORNS SYSTEM HOT AT ALL TIMES HVAC CONTROL MODULE HYBRID POWERTRAIN CONTROL MODULE HYBRID/EV BATTERY PACK (HYBRID) (RIGHT SIDE OF LUGGAGE COMPT) INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT LOCK RELAY CTRL NETWORK BUS 3 NETWORK BUS 4 PASSENGER DOOR LATCH ASSEMBLY PASSENGER DOOR LOCK SWITCH PPL RCDLR DATA RECEIVE RED/VIO WIRE SECURITY IND CTRL STARTER/GENERATOR CONTROL MODULE STATUS CTRL UNLOCK SIG VIO/GRY WIRE VIO/YEL WIRE WHT/VIO WIRE YEL WIRE YEL/LT GRN WIRE

4 2 1 ACTR SPLY VOLT ACTR TRANSMIT SIG ACTR RTN ACTR RECEIVE SIG AJAR SW SIG BLK WIRE BRN/WHT WIRE BRN/YEL WIRE CHILD SECURITY LOCK DISABLE RELAY COMPUTER DATA LINES SYSTEM DK BLU WIRE DRIVER INFORMATION SECURITY CENTER IND DISPLAY FROM BREAKOUT TO WINDOW MOTOR) GMLAN SERIAL DATA LOGIC GRN/GRY WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/LT GRN WIRE INSTRUMENT CLUSTER KEYLESS ENTRY ANTENNA LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR WINDOW SWITCH LT GRN/GRY WIRE NETWORK BUS 3 NETWORK BUS 4 PASSENGER WINDOW MOTOR (FRONT PASSENGER'S DOOR) RECEIVER (ON PASSENGER SIDE C-PILLAR) REMOTE CONTROL DOOR LOCK RIGHT REAR DOOR LATCH ASSEMBLY RIGHT REAR WINDOW SWITCH TO REAR OF VEHICLE) VIO/GRY WIRE VIO/YEL WIRE WHT/BLU WIRE WHT/DK BLU WIRE WHT/GRN WIRE YEL 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