Buick LaCrosse II (2009-2013) blk Wiring diagrams

BATT POS VOLT BATT POS VOLT SERIAL DATA SERIAL DATA GROUND BLK WIRE COMPUTER DATA LINES SYSTEM DRIVER OUTSIDE REARVIEW MIRROR FUSE GRN WIRE GRY WIRE GRY/YEL WIRE HOT AT ALL TIMES LED SIGNAL LEFT SIDE OBJECT SENSOR (BEHIND LEFT REAR WHEEL) PASSENGER OUTSIDE REARVIEW MIRROR RED/LT GRN WIRE RIGHT SIDE OBJECT SENSOR (BEHIND RIGHT REAR WHEEL) SERIAL DATA GROUND GROUND LED SIGNAL UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY)

7 2 TRUNK LP CTRL INADVERTENT PWR CTRL BATT POS VOLT BLK WIRE BLOCK, LEFT TAIL LAMP) BODY CONTROL MODULE (LEFT SIDE OF DASH) CENTER CONSOLE COMPARTMENT CENTER CONSOLE COMPARTMENT LAMP COMPUTER DATA LINES SYSTEM COURTESY LAMP COURTESY LP SW SIG CRUISE CONTROL, SOUND SYSTEMS DIMMER SWITCH DRIVER DOOR COURTESY PASSENGER DOOR COURTESY FOG LAMP SWITCH FRONT DOME/ READING LAMPS FUSE FUSE GRN/GRY WIRE GRN/YEL WIRE GRY WIRE GRY/LT GRN WIRE HEADLAMP SWITCH HOT AT ALL TIMES INSTRUMENT ILLUMINATION CIRCUIT INSTRUMENT PANEL COMPARTMENT LAMP INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT FUSE SIDE OF DASH) INTR LP CTRL INTR LP DEFEAT SW SIG LAMP LAMP LAMP LAMP SWITCH LED AMBIENT LIGHTING CTRL LEFT REAR DOOR COURTESY LEFT SUNSHADE MIRROR LIFT GATE AJAR SW SIG LIGHTING CTRL SW SIG LIGHTING CTRL SW REF LT GRN/GRY WIRE NETWORK BUS 3 NETWORK BUS 4 ORG/ WIRE READING LAMPS REAR COMPARTMENT COURTESY LAMP REAR COMPARTMENT LID LATCH (IN TRUNK LID) RED WIRE RED/BRN WIRE RED/DK GRN WIRE RED/LT GRN WIRE RIGHT INSTRUMENT PANEL RIGHT REAR DOOR COURTESY RIGHT SUNSHADE MIRROR LAMP VIO/BRN WIRE VIO/GRY WIRE WHT WIRE WHT/BRN WIRE WHT/YEL WIRE YEL WIRE

2 1 LR DOOR AJAR SW SIG NETWORK BUS 4 2 1 RR DOOR AJAR SW SIG NETWORK BUS 4 AJAR SW SIG BLK WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DRIVER DOOR ACCENT LAMP DRIVER DOOR HANDLE ACCENT LAMP DRIVER DOOR LATCH ASSEMBLY GRN/GRY WIRE GRN/YEL WIRE GRY WIRE LEFT CENTER CONSOLE CUPHOLDER ACCENT LAMP LEFT INSTRUMENT PANEL ACCENT LAMP LEFT REAR DOOR ACCENT LAMP LEFT REAR DOOR HANDLE ACCENT LAMP LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR WINDOW SWITCH NCA WIRE NETWORK BUS 3 PASSENGER DOOR HANDLE ACCENT LAMP PASSENGER DOOR ACCENT LAMP PASSENGER DOOR LATCH ASSEMBLY RED WIRE RIGHT CENTER CONSOLE CUPHOLDER ACCENT LAMP RIGHT INSTRUMENT PANEL ACCENT LAMP RIGHT LEFT CENTER CENTER CONSOLE ARMREST ACCENT LAMP CONSOLE ARMREST ACCENT LAMP RIGHT LOWER INSTRUMENT PANEL ACCENT LAMP RIGHT REAR DOOR ACCENT LAMP RIGHT REAR DOOR HANDLE ACCENT LAMP RIGHT REAR DOOR LATCH ASSEMBLY RIGHT REAR WINDOW SWITCH WHT WIRE WHT/YEL WIRE YEL/ WHT WIRE

1 2 3 4 5 6 7 8 DIMMING SIG LOW REF SW SIG B+ BLK WIRE COMPUTER DATA LINES SYSTEM FUSE GRN WIRE GROUND SER DATA GRY WIRE HEAD-UP DISPLAY HEAD-UP DISPLAY SWITCH HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) PAGE RED/DK BLU WIRE YEL WIRE

BATTERY FUSE BLOCK (TOP OF BATTERY) BLK WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN/GRY WIRE BRN/WHT WIRE FUSE GROUND DISTRIBUTION SYSTEM GROUND DISTRIBUTION SYSTEM PNK WIRE HORN ASSEMBLY (RIGHT FRONT OF VEHICLE) HORN RELAY HORN RLY CTRL HORN SW SIG HORN SWITCH HOT AT ALL TIMES LT GRN WIRE 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)

2.4L 25 26 25 26 27 70 36 9 26 41 FUEL LVL LOW REF FUEL LVL SERIAL DATA 3.0L, 3.6L 419 893 185 ENGINE CONTROLS SYSTEM 6 12 DN ABS IND. AIR BAG IND AMBIENT AIR TEMPERATURE SENSOR (LEFT FRONT OF VEHICLE ON BUMPER FASCIA) AWD DK BATT POS VOLT IGNITION 1 VOLTAGE BLK WIRE BLK/DK BLU WIRE BLK/LT GRN WIRE BLK/YEL WIRE BLU WIRE BRAKE IND BRAKE WEAR IND BRN/WHT WIRE CHARGING IND CHECK ENGINE INDI CTRL DIC SELECT MENU SW SIG LOW WASHER FLUID IND 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) 3.0L 3.6L 2.4L ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE GAUGE ENGINE COOLANT TEMPERATURE IND ENGINE OIL PRESSURE SWITCH (FRONT OF ENGINE) ENGINE OIL PRESSURE SWITCH (LOWER FRONT ESC OFF IND FOG LAMPS IND FUEL GAUGE FUEL PUMP, LEVEL SENDER ASSEMBLY (IN FUEL TANK) FUSE FUSE FUSE GRN WIRE GROUND GRY WIRE HIGH BEAM IND HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) HOT W/ IGNITION MAIN RELAY ENERGIZED ILLUMINATION INSTRUMENT CLUSTER LEFT TURN IND LOGIC LOW FUEL WARNING LAMP IND LOW REF (OR 2755) LOW SPD GMLAN SER DATA LOW TIRE PRESSURE IND LOW WASHER FLUID IND LT GRN WIRE MALFUNCTION IND MENU OF ENGINE) OIL LEVEL IND OIL PRESS SW OUTSIDE AMBIENT AIR TEMP SENS SIG LOW REF DIC SWITCH LOW REF DIC SWITCH SIGNAL PARK IND PARK LAMPS IND RED WIRE RED/BLK WIRE RED/WHT WIRE RIGHT TURN IND SEAT BELT IND SECONDARY FUEL LEVEL SENSOR (TOP OF FUEL TANK) SECURITY IND SET/CLR SPEEDOMETER TACHOMETER TCS OFF IND TCS/ECS IND TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/GRY WIRE VIO/YEL WIRE WHT WIRE WIPER/WASHER SYSTEM YEL/DK BLU WIRE

1 2 3 4 IGN GND NETWORK BUS 2 1 2 NETWORK BUS 4 RR DOOR AJAR SW SIG 2 1 LR DOOR AJAR SW SIG NETWORK BUS 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 BODY CONTROL MODULE (LEFT SIDE OF DASH) BRAKE FLUID LEVEL SWITCH (ON BRAKE FLUID RESERVOIR) BRN WIRE COMPASS MODULE (W/O ON STAR) COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM 5986 333 DK BLU WIRE DK BLU/BLK WIRE DK BLU/VIO WIRE DRIVER DOOR LATCH ASSEMBLY DRIVER WINDOW MOTOR (DRIVER'S DOOR) ELECTRONIC BRAKE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) 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 GMLAN DATA BUS LOGIC LT BLU WIRE LT GRN/GRY WIRE 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 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 RUN RLY COIL SERIAL DATA BRK FLUID LVL SERIAL DATA RLY COIL CTRL TRANSMISSION SHIFT LEVER POSITION INDICATOR VIO/GRY WIRE VIO/YEL WIRE VOL REF PARK BRK SPLY VOLT WHT WIRE WHT/DK BLU WIRE YEL WIRE YEL/RED WIRE

22 1 SERIAL DATA BATT POS VOLT AIR BAG COIL AUTO BLK WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE COMPUTER DATA LINES SYSTEM CRUISE CONTROL, SOUND SYSTEMS DIMMER SWITCH DOME/ READING LAMPS FOG LAMP SWITCH FRONT DOME/ READING LAMPS FUSE GARAGE DOOR OPENER GRN WIRE HDLP SW PARK LP SIG HEAD HEADLAMP SWITCH HEADUP DISPLAY SWITCH (IF EQUIPPED) HORN SWITCH HOT AT ALL TIMES IGNITION MODE SWITCH INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) INSTRUMENT PANEL MULTI-FUNCTION SWITCH 1 INSTRUMENT PANEL MULTI-FUNCTION SWITCH 2 LED BACK LEFT STEERING WHEEL CONTROLS SWITCH LIGHT CTRL SW REF LIGHT CTRL SW SIG LIGHT DIMMING CONTROL LT GRN WIRE OFF OUTSIDE REARVIEW MIRROR SWITCH PARK PARK BRAKE CONTROL SWITCH (ON PARK BRAKE ASSEMBLY) PASSENGER WINDOW SWITCH PNK WIRE RED/WHT WIRE RIGHT STEERING WHEEL CONTROLS SWITCH SERIAL DATA LOGIC STEERING WHEEL) SUNROOF SUNSHADE SWITCH SUNROOF SWITCH WHT WIRE YEL WIRE

14 18 SEAT SW SIG (1) GMLAN SERIAL DATA BLK WIRE BLK/BRN WIRE BLK/GRN WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/RED WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE DOWN DRIVER OUTSIDE REARVIEW MIRROR DRIVER SEAT MEMORY SWITCH FUSE GRN/BLK WIRE GRN/BLU WIRE GRN/WHT WIRE GRN/YEL WIRE GROUND GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/LT GRN WIRE GRY/RED WIRE GRY/YEL WIRE HOT AT ALL TIMES LAMP SUPPLY VOLT LEFT LOGIC LOGIC PASSENGER WINDOW SWITCH LOW REF LT GRN WIRE LT GRN/BLK WIRE LT GRN/VIO WIRE LT GRN/WHT WIRE MEM MOTOR COMM NAVIGATION SYSTEM NETWORK BUS 8 OUTSIDE REARVIEW MIRROR SWITCH PASSENGER PASSENGER OUTSIDE REARVIEW MIRROR POSITION CTRL POSITIVE VOLT PPL PPL SENS SIG RED/VIO WIRE RIGHT SEAT MEMORY CONTROL MODULE (UNDER DRIVER'S SEAT) SENS SIG SET SIG UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/GRY WIRE VIO/WHT WIRE YEL/BRN WIRE YEL/VIO WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 FORWARD SW SIG 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 NTC LOW REF 1 2 3 4 5 6 7 8 POSITIVE VOLT 2424 5978 SEATS SYSTEM BLK WIRE BLK/BLU WIRE BLK/RED WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN/BLK WIRE COMPUTER DATA LINES SYSTEM DRIVER SEAT ADJUSTER SWITCH DRIVER SEAT FRONT VERTICAL MOTOR (UNDER RIGHT FRONT CORNER OF DRIVER SEAT) DRIVER SEAT HORIZONTAL MOTOR (UNDER DRIVER'S SEAT) DRIVER SEAT MEMORY SWITCH DRIVER SEAT REAR VERTICAL MOTOR (UNDER RIGHT REAR CORNER OF DRIVER SEAT) DRIVER SEAT RECLINE MOTOR (LOWER RIGHT SIDE OF DRIVER SEAT BACK) ELEMENT SPLY VOLT ELEMENT SPLY VOLT NTC LOW REF FORWARD SW SIG REARWARD SW SIG FRONT VERTICAL DOWN REAR VERTICAL UP FRONT VERTICAL UP GRN WIRE GRN/BLK WIRE GRN/GRY WIRE GRN/PPL WIRE GRN/YEL WIRE GROUND GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/RED WIRE HORIZONTAL FORWARD HORIZONTAL REARWARD HOT AT ALL TIMES UNDERHOOD FUSE BLOCK (LEFT SIDE FUSE OF BATTERY) LO GMLAN SER DATA LOW REF LOW REF LOW REF LT GRN WIRE MEM MOTOR CTRL NETWORK BUS 8 DOWN SW SIG HIGH REF (2) NTC SIG ORG/ WIRE ORG/GRY WIRE PNK NTC SIG WIRE POSITION SENS SIG POSITION SENS SIG POSITION SENS SIG POSITION SENS SIG POSITIVE VOLT GROUND UP CTRL DOWN CTRL REAR VERTICAL DOWN RECLINE FORWARD REARWARD SW SIG RECLINE REARWARD RED WIRE RED/GRN WIRE RED/LT GRN WIRE RED/WHT WIRE RED/YEL WIRE SEAT MEMORY CONTROL MODULE (UNDER DRIVER'S SEAT) SEATS SYSTEM SEATS SYSTEM COMPUTER DATA LINES SYSTEM SW SET SIG SW SIG 1 WHT/ORG WIRE WHT/PPL WIRE WHT/RED WIRE YEL WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/RED WIRE YEL/WHT WIRE