Buick LaCrosse II (2009-2013) vio 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

11 12 IG MODE SW CTRL LOW REF 21 20 W/ KEYLESS ENGINE START 3 4 PPL PPL ACC VOLT RUN/CRANK 1 VOLT 307 3287 HEADLIGHTS SYSTEM HORNS SYSTEM 664 94 EXTERIOR LIGHTS SYSTEM WIPER/WASHER SYSTEM ACC IND ACCESSORY LED SIGNAL LIGHTING CONTROL SW SIG AMBIENT LIGHT SENSOR SIGNAL SW SIG PPL ANTI-THEFT SYSTEM HEADLIGHTS SYSTEM BLK WIRE BLK/BRN WIRE BRAKE APPLY SENSOR SIGNAL LED BACKLIGHT DIMMING CTRL BRN WIRE COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM CRUISE CONTROL SYSTEM INTERIOR LIGHTS SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DOOR LOCKS SYSTEM DOOR LOCKS SYSTEM EXTERIOR LIGHTS SYSTEM DOOR LOCKS SYSTEM DRIVER DR LK SW LOCK SIG FUSE FUSE (LOWER LEFT SIDE OF DASH) FUSE FUSE FUSE FUSE FUSE GRN WIRE GRN/GRY WIRE GRN/PPL WIRE GRY WIRE GRY/LT GRN WIRE GRY/WHT WIRE HDLP SW FLASH TO PASS SIG HORN SWITCH SIGNAL HEADLAMP OFF SIG HEADLAMP SW ON SIG HAZARD LED DIMMING SIGNAL HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM TRANSMISSIONS SYSTEM HOT AT ALL TIMES IGNITION KEY RESISTOR SIG IGNITION MODE SWITCH INSTRUMENT PANEL FUSE BLOCK INTERIOR LAMP DEFEAT SW SIG KEYLESS ENTRY CONTROL MODULE (RIGHT KICK PANEL) LT GRN WIRE LT GRN/WHT WIRE LT GRN/YEL WIRE NAVIGATION SYSTEM OFF/RUN/CRANK VOLT PPL HAZARD SW TURN RIGHT SIG WINDSHIELD WASHER SW SIG PPL PPL PPL PPL 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 PPL PPL W/O KEYLESS ENGINE START RED WIRE RED/BLK WIRE RED/BRN WIRE RED/LT GRN WIRE RED/VIO WIRE RED/WHT WIRE SHIFT INTERLOCK SYSTEM SOUND SYSTEMS START IND UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/BLK WIRE VIO/YEL WIRE WHT WIRE WINDSHIELD WIPER SW HI SIG WIPER/WASHER SYSTEM YEL WIRE YEL/LT GRN WIRE

4 2 7531 5060 NETWORK BUS 9 LO SPD GMLAN SERIAL DATA ACTUATOR TRANSMIT SIG BREAKOUT TO INLINE TO DRIVER SEAT HARNESS) GRN WIRE GRN/BLU WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/GRN WIRE GRY/RED WIRE HEAD-UP DISPLAY (IF EQUIPPED) HVAC CONTROL MODULE INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (BELOW CENTER CONSOLE) INFO DISPLAY MODULE INSTRUMENT CLUSTER KEYLESS ENTRY CONTROL MODULE LEFT SIDE OBJECT SENSOR (IF EQUIPPED) (BEHIND LEFT REAR WHEEL) LO SPD GMLAN SERIAL DATA LT GRN/WHT WIRE MULTIMEDIA PLAYER INTERFACE MODULE (W/ AUDIO INTERFACE) NCA WIRE NETWORK BUS 8 OUTSIDE REAR VIEW MIRROR SWITCH PASSENGER PRESENCE DETECTION MODULE (UNDER FRONT PASSENGER'S SEAT) PASSENGER WINDOW SWITCH PPL RADIO RADIO/HVAC CONTROLS REAR PARKING ASSIST CONTROL MODULE (W/ REAR PARKING ASSIST SENSOR INDICATOR) RIGHT SIDE OBJECT SENSOR (BEHIND RIGHT REAR WHEEL) SEAT HEATING CONTROL MODULE (UNDER FRONT CENTER OF DRIVER SEAT) SEAT MEMORY CONTROL MODULE (UNDER DRIVER'S SEAT) SPLICE PACK TELEMATICS COMMUNICATIONS INTERFACE CONTROL MODULE VIO WIRE W/ MEMORY W/ NAVIGATION W/O MEMORY W/O NAVIGATION YEL WIRE

BATTERY FUSE BLOCK BLK WIRE BRN WIRE BRN/VIO WIRE BRN/YEL WIRE DRIVER OUTSIDE REARVIEW MIRROR FUSE FUSE (TOP OF BATTERY) HOT AT ALL TIMES HVAC CONTROL MODULE LEFT REAR WINDOW DEFOGGER NOISE FILTER PASSENGER OUTSIDE REARVIEW MIRROR REAR DEFOGGER GRID REAR DEFOGGER IND REAR DEFOGGER RELAY REAR DEFOGGER RLY CTRL REAR DEFOGGER SWITCH LOGIC RED WIRE RIGHT REAR WINDOW DEFOGGER NOISE FILTER UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE YEL BRN/ WIRE

BLK WIRE BRAKE PEDAL POSITION SENSOR (NEAR TOP OF ACCELERATOR PEDAL ASSEMBLY) BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/ WHT WIRE DK BLU/VIO WIRE DK BLU/WHT WIRE DRIVER OUTSIDE REARVIEW MIRROR LEFT TURN SIGNAL REPEATER LAMP FUSE GMLAN LO SPD GRN WIRE GRY/BRN WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT CLUSTER LEFT TURN IND LOGIC LT BLU WIRE LT GRN WIRE LT GRN/ VIO WIRE LT GRN/VIO WIRE PASSENGER OUTSIDE REARVIEW MIRROR PPL RED/ LT BLU WIRE RED/WHT WIRE RIGHT FRONT SIDE MARKER LAMP RIGHT PARK/ TURN SIGNAL LAMP RIGHT REAR TURN SIGNAL LAMP RIGHT TAIL LAMP RIGHT TAIL/ STOP LAMP RIGHT REAR SIDE MARKER LAMP RIGHT TURN IND RIGHT TURN SIGNAL REPEATER LAMP RUN/CRANK IGNITION 1 VOLT SER DATA TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/GRY WIRE W/ HID W/ HID RIGHT HEADLAMP W/ POWER FOLDING OUTSIDE MIRROR W/O HID W/O POWER FOLDING OUTSIDE MIRROR WHT WIRE WHT/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

3 OF 5) FUSE 3.0L, 3.6L 2.4L 3.6L 5 OF 5) AIR QUALITY SENSOR (IF EQUIPPED) BLK WIRE BODY CONTROL MODULE BRN WIRE CONTROL SOLENOID VALVE ASSEMBLY COOLING FAN LOW SPEED RELAY DK BLU WIRE ENGINE CONTROLS IGNITION RELAY ENGINE HVAC CONTROL CONTROL MODULE MODULE FROM BATTERY FUSE BLOCK (DIAGRAM 1 OF 5) FROM ENGINE CONTROL MODULE RELAY (DIAGRAM 2 OF 5) FRONT FOG LAMP RELAY FUEL PUMP CONTROL MODULE FUSE FUSE (DIAGRAM FUSE FUSE FUSE FUSE FUSE GRY WIRE HEADLAMP HIGH BEAM RELAY HORN RELAY IGNITION MAIN RELAY INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE INFO MULTIMEDIA DISPLAY PLAYER MODULE INTERFACE MODULE INSIDE REARVIEW MIRROR INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) LT GRN/VIO WIRE MASS AIR FLOW SENSOR/INTAKE AIR TEMPERATURE SENSOR RADIO/ HVAC CONTROLS (IF EQUIPPED) REARVIEW CAMERA RED WIRE RED/BLK WIRE RED/BRN WIRE RED/DK BLU WIRE RED/DK GRN WIRE RED/VIO WIRE RED/WHT WIRE SECONDARY COOLING FAN AIR RIGHT INJECTION HIGH SPEED PUMP RELAY RELAY TO BODY CONTROL MODULE (DIAGRAM 5 OF 5) TO IGNITION DATA LINK SWITCH CONNECTOR (DIAGRAM 5 OF 5) TO WINDSHIELD WASHER PUMP RELAY (DIAGRAM 2 OF 5) UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/BLK WIRE VIO/GRY WIRE VIO/LT GRN WIRE VIO/WHT WIRE W/ AUDIO INTERFACE W/ REAR VIEW CAMERA W/ SIDE OBSTACLE DETECTION, SENSOR INDICATOR (NOT USED) W/O REAR VIEW CAMERA WHT WIRE WINDSHIELD WINDSHIELD WIPER WASHER RELAY PUMP RELAY WINDSHIELD WIPER SPEED CONTROL RELAY YEL WIRE

5 15 CAMERA SIG - CAMERA SIG + BLK WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) DK BLU WIRE DK GRN/WHT WIRE FUSE GRY WIRE GRY/YEL WIRE HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT GROUND CAMERA SIG - LAMP RLY CTRL LT GRN WIRE LT GRN/WHT WIRE NCA WIRE RADIO REARVIEW CAMERA RED WIRE SHIELD EXT CAMERA SIG + UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/BLK WIRE WHT WIRE WHT/DK BLU WIRE