Buick LaCrosse II (2009-2013) fuse fuse Wiring diagrams

24 25 GMLAN SERL DATA (+) GMLAN SERL DATA (-) 2500 2501 COMPUTER DATA LINES SYSTEM ABS IND. BLK WIRE BLK/BLU WIRE BLK/DK BLU WIRE BLK/GRY WIRE BLK/VIO WIRE BLK/YEL WIRE BLU/WHT WIRE BLU/YEL WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRAKE BOOSTER PUMP MOTOR BRAKE BOOSTER PUMP MOTOR RELAY (RIGHT SIDE OF ENGINE COMPT) BRN WIRE COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEMS DK BLU WIRE DK GRN/BRN WIRE DRIVER INFORMATION CENTER DISPLAY ELECTRONIC BRAKE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) ESC OFF IND FUSE FUSE FUSE GND VOLTAGE 5-VOLT REF LOW REFERENCE SERIAL DATA + SERIAL DATA - GRN WIRE GRY WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER INSTRUMENT PANEL MULTI-FUNCTION SWITCH 2 INT LMP SW SIG LEFT FRONT WHEEL SPEED SENSOR (LEFT FRONT STEERING KNUCKLE ASSEMBLY) LOW REF RIGHT REAR SENS SIG RIGHT REAR LT GRN/BRN WIRE LT GRN/GRY WIRE MULTI-AXIS ACCELERATION SENSOR (UNDER CENTER CONSOLE BETWEEN FRONT SEATS) NCA WIRE RADIO RED WIRE RED/BLU WIRE RED/DK BLU WIRE RED/GRY WIRE RED/YEL WIRE RIGHT FRONT WHEEL SPEED SENSOR RIGHT REAR WHEEL SPEED SENSOR (RIGHT REAR UPPER CONTROL ARM) SERIAL DATA - SERIAL DATA + BRAKE VACUUM SENS SIG SERIAL DATA ENABLE STEERING COLUMN) STEERING WHEEL ANGLE SENSOR (BASE OF TCS/ ESC IND UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE W/ CONTINUOUSLY VARIABLE REAL TIME DAMPING CHASSIS W/ FRONT FOG LAMP W/O CONTINUOUSLY VARIABLE REAL TIME DAMPING CHASSIS WHL SPD SENS LOW REF LR WHL SPD SENS SIG LR WHT WIRE WHT/DK BLU WIRE YEL WIRE YEL/RED WIRE YEL/VIO WIRE

10 12 HS SERIAL DATA + HS SERIAL DATA - 13 14 5 HS SERIAL DATA + HS SERIAL DATA - DATA COM ENABLE 2 4 1 3 HS SERIAL DATA + HS SERIAL DATA - HS SERIAL DATA + HS SERIAL DATA - 22 25 HS SERIAL DATA + HS SERIAL DATA - 24 23 HS SERIAL DATA - HS SERIAL DATA + 3 1 HS SERIAL DATA - HS SERIAL DATA + 30 29 28 31 HS SERIAL DATA + HS SERIAL DATA - HS SERIAL DATA - HS SERIAL DATA + 4 3 HS SERIAL DATA - HS SERIAL DATA + 42 55 41 39 40 70 HS SERIAL DATA + HS SERIAL DATA - ACCESSORY WAKEUP SERIAL DATA 7 6 17 22 21 HS SERIAL DATA + HS SERIAL DATA - 8 16 1 13 HS SERIAL DATA - HS SERIAL DATA + DATA COM ENABLE NETWORK BUS 6 BLK WIRE BLU/YEL WIRE BREAKOUT INTO TRANSMISSION CONNECTOR) CONTROL SOLENOID VALVE ASSEMBLY (ON FRONT OF TRANSFER CASE) DATA COM ENABLE DATA COM ENABLE HS SERIAL DATA + HS SERIAL DATA - DATA LINK CONNECTOR (LEFT SIDE OF DASH) DK BLU WIRE DK BLU/ WHT WIRE ELECTRONIC BRAKE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) EXCEPT 2.4L 2.4L EXCEPT 3.6L 3.6L EXCEPT AWD EXCEPT AWD W/ CONTINUOUSLY VARIABLE REAL TIME DAMPING FROM BREAKOUT TO FUEL PUMP CONTROL MODULE (RIGHT REAR CORNER OF REAR COMPT) FUSE FUSE GRN WIRE GRN/PPL WIRE HOT AT ALL TIMES HS SERIAL DATA + HS SERIAL DATA + HS SERIAL DATA - HS SERIAL DATA - INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) MULTI-AXIS ACCELERATION SENSOR (UNDER CENTER CONSOLE BETWEEN FRONT SEATS) PACK) POWER STEERING CONTROL MODULE (W/ VARIABLE EFFORT) (LOWER LEFT SIDE OF DASH) REAR DIFFERENTIAL CLUTCH CONTROL MODULE (AWD) (MOUNTED TO REAR DIFFERENTIAL) RED/DK GRN WIRE RED/WHT WIRE STEERING WHEEL ANGLE SENSOR (BASE OF STEERING COLUMN) SUSPENSION CONTROL MODULE (IF EQUIPPED) (LEFT CORNER OF REAR COMPT) TELEMATICS COMMUNICATIONS INTERFACE CONTROL MODULE (CENTER OF REAR WINDOW SHELF) VIO/YEL WIRE W/ CONTINUOUSLY VARIABLE REAL TIME DAMPING AWD W/ NON-VARIABLE RATIO POWER STEERING W/O NON-VARIABLE RATIO POWER STEERING W/O ONSTAR WHT WIRE WHT/DK BLU WIRE YEL (OR WHT) WIRE YEL WIRE YEL/BLK (DK BLU) WIRE YEL/BLK (OR DK BLU) WIRE YEL/BLK WIRE

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

1 2 33 32 RF DRL SPLY VOLT LF DRL SPLY VOLT 2 3 2540 2140 B+ B+ 22 10 5060 278 LOW SPD GMLAN SER DATA AMBIENT LIGHT SENS SIG 22 11 16 13 306 103 HDLP SW PARK LP SIG ADAPTIVE FRONT LIGHTING CIRCUIT AMBIENT LIGHT/ SUNLOAD SENSOR (CENTER OF DASH) BLK WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM CRUISE CONTROL, SOUND SYSTEMS DK BLU WIRE DK BLU/BRN WIRE FRONT FOG LAMP FUSE FUSE FUSE GRN WIRE GRY WIRE GRY/DK BLU WIRE HDLP DIMMER SW HI BEAM SIG HDLP OFF SIG CTRL HDLP SW ON SIG HDLP SW FLASH TO PASS SIG HEADLAMP HIGH BEAM RELAY HEADLAMP LOW BEAM RELAY HIGH LOW FTP HOT AT ALL TIMES HOT AT ALL TIMES BATTERY FUSE BLOCK FUSE (TOP OF BATTERY) HVAC CONTROL MODULE INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) LEFT DAYTIME RUNNING LAMP (BOTTOM OF "A" PILLAR) LEFT HEADLAMP LEFT HIGH BEAM SOLENOID ACTUATOR LEFT LOW BEAM HEADLAMP LIGHTING CTRL SW REF LIGHTING CTRL SW SIG LOW REF LT GRN WIRE NCA WIRE RED WIRE RED/BLK WIRE RELAY RIGHT DAYTIME RUNNING LAMP RIGHT HEADLAMP RIGHT HEADLAMP BALLAST RIGHT HIGH BEAM SOLENOID ACTUATOR RIGHT LOW BEAM HEADLAMP TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE WHT WIRE YEL WIRE

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 DISPLAY SIG (-) DISPLAY SIG (+) DRAIN WIRE 16 1 B+ SERIAL DATA 19 20 DISPLAY TOUCH - LF SPD SENS SIG 2 1 8 LOW REF VOICE SIGNAL DRAIN WIRE 44 28 B+ SERIAL DATA 5149 5152 1792 (UYS) (UYS) (UYS) 6 12 5 VOICE SIGNAL LOW REF DRAIN WIRE 6 16 AUDIO SIGNAL LOW REF 6 20 VOICE SIGNAL LOW REF 8 9 10 14 DRAIN WIRE NAV DISPLAY + RESET DIMMING CTRL ANTI-LOCK BRAKES SYSTEM BAT POS VOLT BLK WIRE BLK/GRY WIRE BLK/YEL WIRE BRN WIRE BRN/DK GRN WIRE CELLULAR PHONE NAVIGATION, DIGITAL RADIO ANTENNA COAX COMPUTER DATA LINES SYSTEM DIMMING CTRL DISPLAY SIG + DK BLU WIRE DRAIN WIRE FUSE FUSE FUSE GRN WIRE GROUND GRY WIRE GRY/YEL WIRE HOT AT ALL TIMES INFO DISPLAY MODULE (W/ NAVIGATION) INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) LOGIC LT GRN/YEL WIRE NAV TOUCH + NAVIGATION ANTENNA NAVIGATION ANTENNA SIGNAL SPLITTER NCA WIRE RADIO RADIO ANTENNA RADIO ANTENNA MODULE (BEHIND "C" PILLAR TRIM) RED WIRE RED/BLK WIRE RED/DK BLU WIRE RED/VIO WIRE REMOTE ENABLE RESET+ SOUND SYSTEMS TELEMATICS COMMUNICATIONS INTERFACE CONTROL MODULE VIO WIRE W/ DIGITAL AUDIO SYSTEM W/ UYS W/O DIGITAL AUDIO SYSTEM W/O UYS YEL WIRE

BLK WIRE BLK/GRN WIRE BLK/LT GRN WIRE BLK/YEL WIRE BLU/BRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CENTER (DIC) COMMUNICATION COMPUTER DATA LINES SYSTEM DATA DISPLAY DK BLU WIRE DK BLU/BLK WIRE DK BLU/WHT WIRE ENABLE ENGINE FLP SENS FPP RLY CTRL FUEL PRESSURE SENSOR (IN FUEL TANK) FUEL PUMP CONTROL MODULE (RIGHT REAR CORNER OF REAR COMPT) FUSE FUSE FUSE GMLAN SERIAL GMLAN SERIAL DATA GRN WIRE GROUND GRY WIRE GRY/DK BLU WIRE HOT AT ALL TIMES HOT W/ ENGINE CONTROL RELAY ENERGIZED HOT W/ IGNITION MAIN RELAY ENERGIZED IGN IGN 1 VOLT INFORMATION INSTRUMENT CLUSTER LOGIC LOW REF LT GRN/DK BLU WIRE LT GRN/GRY WIRE MIL IND NCA WIRE PRESS SENS SIG RED/BRN WIRE RED/LT GRN WIRE RED/VIO WIRE RED/WHT WIRE RUN/CRANK SECONDARY AIR INJECTION PUMP RELAY SECONDARY AIR INJECTION SOLENOLD VALVE RELAY SERIAL DATA SHIELD EXTENSION SPLY VOLT FUEL PUMP UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) USED) VIO/BLK WIRE VIO/DK BLU WIRE VIO/LT GRN WIRE WHT WIRE WHT/DK BLU WIRE YEL WIRE

5-VOLT REF 1 BLK/BRN WIRE BLK/GRY WIRE BLK/LT GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE DK BLU WIRE DK BLU/GRY WIRE DK BLU/WHT WIRE DK GRN WIRE ENGINE CONTROL MODULE (LEFT FRONT ENGINE CONTROL MODULE RELAY EXHAUST CAMSHAFT POSITION ACTUATOR SOLENOID VALVE EXHAUST SOLENOID (1) FUEL INJECTOR 1 FUEL INJECTOR 1 CTRL FUEL INJECTOR 1 CYND FUEL INJECTOR 2 FUEL INJECTOR 2 CTRL FUEL INJECTOR 2 CYND FUEL INJECTOR 3 FUEL INJECTOR 3 CTRL FUEL INJECTOR 3 CYND FUEL INJECTOR 4 FUEL INJECTOR 4 CTRL FUEL INJECTOR 4 CYND FUSE FUSE FUSE GRY/DK BLU WIRE GRY/YEL WIRE HOT AT ALL TIMES BATTERY FUSE BLOCK (TOP OF BATTERY) INTAKE SOLENOID (1) LOW REF LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/GRY WIRE LT GRN/WHT WIRE OF ENGINE COMPT) RED WIRE RED/WHT WIRE SIG GROUND TOP OF ENGINE) UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/BRN WIRE VIO/DK BLU WIRE YEL WIRE

BATTERY FUSE BLOCK (TOP OF BATTERY) BLK/GRY WIRE BLK/LT GRN WIRE BLK/YEL WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU/WHT WIRE ENGINE CONTROLS IGNITION RELAY FUSE FUSE FUSE GRN WIRE GRY/WHT WIRE HEATED OXYGEN SENSOR BANK 1 SENSOR 1 (REAR OF ENGINE IN BANK 1 EXHAUST MANIFOLD) HEATED OXYGEN SENSOR BANK 2 SENSOR 1 (REAR OF ENGINE IN BANK 2 EXHAUST MANIFOLD) HIGH PRESSURE FUEL PUMP (LEFT REAR OF ENGINE) HOT AT ALL TIMES IGN INSTRUMENT CLUSTER KNOCK SENSOR 1 (LEFT OF EXHAUST MANIFOLD) KNOCK SENSOR 2 (RIGHT OF STARTER) LOGIC LO SPD GMLAN SERIAL DATA LT GRN/GRY WIRE LT GRN/YEL WIRE MALFUNCTION IND RED WIRE RED/BLU WIRE RED/BRN WIRE RED/LT GRN WIRE RED/VIO WIRE UNDERHOOD FUSE BLOCK VIO/BLK WIRE VIO/DK BLU WIRE VIO/GRY WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/GRY WIRE YEL WIRE YEL/RED WIRE YEL/WHT WIRE

A/C REFRIGERANT PRESSURE SENSOR (FRONT OF ENGINE COMPT, MOUNTED TO CONDENSER) ACCELERATOR PEDAL POSITION (APP) SENSOR (LEFT SIDE OF DASH) ACCESSORY WAKEUP SERIAL DATA GMLAN SERIAL DATA (+) APP LOW REFERENCE 1 APP SENS 1 SIG BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/LT GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BRN/RED WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM COOLING FANS SYSTEM 5 6 3 CRUISE CONTROL SYSTEM DK BLU WIRE DK BLU/LT GRN WIRE DK BLU/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT) EVAP CANISTER VENT SOL CTRL HEATER LO CTRL BANK 2 SENS 2 FUEL LEVEL SENS LOW REF FUEL PUMP PRIMARY RELAY CTRL LOW REF FUEL LVL SENS SIG FUSE FUSE FUSE GRN WIRE GRY/WHT WIRE HI SPD COOLING FAN RELAY CTRL LO SPD COOLING FAN RLY CTRL APP LOW REF 2 HIGH SIGNAL BANK 1 SENSOR 2 A/C REFRIGERANT PRE SENS SIG HOT W/ IGNITION MAIN RELAY ENERGIZED IAT SENS SIG HI SIG BANK 2 SENSOR 2 CRUISE/ETC/TCC BRAKE SIGNAL INSTRUMENT CLUSTER SYSTEM LT BLU/BLK(OR DK BLU/WHT) WIRE LT GRN WIRE LT GRN/GRY WIRE LT GRN/VIO WIRE LT GRN/WHT WIRE MAF SENS SIG PARK/NEUTRAL SIGNAL RED/BRN WIRE STARTING/ CHARGING SYSTEM TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/BLK WIRE VIO/DK BLU WIRE VIO/GRY WIRE VIO/LT GRN WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/BRN WIRE WHT/DK BLU WIRE WHT/GRY WIRE WHT/RED DK BLU WIRE WHT/RED WIRE WHT/YEL WIRE YEL WIRE YEL/DK BLU WIRE YEL/RED WIRE YEL/WHT WIRE