Buick LaCrosse III (2016-2019) serial data 2 Wiring diagrams

AUXILIARY HVAC CONTROL MODULE LOGIC BLU/GRN WIRE BLU/GRY WIRE COMM ENABLE DATA DATA BUS 2 DATA BUS 5 DK BLU WIRE DK BLU/VIO WIRE DK BLU/YEL WIRE DK GRN/DK BLU WIRE DK GRN/WHT WIRE DK GRN/YEL WIRE FRONT SEAT HEATING CONTROL MODULE GRN/BLU WIRE GRY/GRN WIRE GRY/LT GRN WIRE GRY/VIO WIRE HI SPD GMLAN HI SPD GMLAN SERIAL DATA (-) (2) HUMAN MACHINE INTERFACE CONTROL MODULE (RIGHT SIDE OF DASH) HVAC CONTROL MODULE HVAC CONTROLS LOGIC INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE LIN SERIAL LIN SERIAL DATA BUS 9 LOW SPD GMLAN LOW SPD GMLAN SERIAL DATA LT GRN WIRE MOST CONTROL MOST SERIAL REAR SEAT HEATING CONTROL MODULE SERIAL DATA SERIAL DATA (-) 9 SERIAL DATA 2 SERIAL DATA COMM ENABLE VIO/YEL WIRE W/ AMPLIFIER W/ RADIO INFOTAINMENT SYSTEM W/O RADIO INFOTAINMENT SYSTEM W/O AMPLIFIER WHT WIRE WHT/DK BLU WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/VIO WIRE

BLU/GRN WIRE BLU/GRY WIRE DATA DATA BUS 10 DATA BUS 12 DATA BUS 2 DATA BUS 5 DK BLU WIRE DK BLU/VIO WIRE DK BLU/YEL WIRE DK GRN/BLK WIRE DK GRN/DK BLU WIRE DK GRN/WHT WIRE DK GRN/YEL WIRE GRY/LT GRN WIRE GRY/VIO WIRE HEAD-UP DISPLAY HI SPD GMLAN SERIAL DATA (+) 9 INFO DISPLAY MODULE INFOTAINMENT CONTROL TOUCHPAD INSTRUMENT CLUSTER LOGIC LIN SERIAL LO SPD GMLAN LOGIC LOW SPD GMLAN LOW SPD GMLAN SERIAL DATA 2 LT GRN WIRE MEDIA DISC PLAYER MOST CONTROL MOST SERIAL RADIO RIGHT STEERING WHEEL CONTROLS SWITCH LOGIC SERIAL DATA 2 SERIAL DATA COMM ENABLE STEERING WHEEL AIR BAG COIL TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE VIO/YEL WIRE W/ INFOTAINMENT CONTROL TOUCHPAD W/ INFOTAINMENT CONTROL TOUCHPAD W/ ONSTAR W/O ONSTAR WHT WIRE WHT/DK BLU WIRE WHT/GRN WIRE WHT/GRY WIRE WHT/VIO WIRE

BLK WIRE BLK/YEL WIRE BLU/GRY WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU/RED WIRE DK GRN/BLK WIRE DRIVER DOOR LATCH ASSEMBLY DRIVER DOOR LOCK SWITCH FRONT OVERHEAD CONSOLE ASSEMBLY GREEN LED CTRL GRY WIRE GRY/GRN WIRE GRY/LT GRN WIRE HAZARD WARNING SWITCH HEADLAMP SWITCH HEATED STEERING WHEEL IND INSIDE STEERING WHEEL) LEFT STEERING WHEEL CONTROLS SWITCH LOGIC LOW SPD GMLAN PASSENGER DOOR LATCH ASSEMBLY PASSENGER DOOR LOCK SWITCH PNK SW LED CTRL WIRE RED LED CTRL WIRE RIGHT STEERING WHEEL CONTROLS SWITCH SERIAL DATA 2 SIG STATUS STEERING WHEEL HEATING CONTROL MODULE TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE VIO WIRE WHT WIRE WHT/VIO WIRE YEL WIRE YEL/GRY WIRE

1-VT 2-VT BATT POS VOLT BLK WIRE BLK/YEL WIRE BRN WIRE CELLULAR PHONE NAVIGATION, DIGITAL RADIO ANTENNA COAX COMPUTER DATA LINES SYSTEM DISPLAY DISPLAY SIG + DK GRN/BLK WIRE DK GRN/DK BLU WIRE DK GRN/WHT WIRE FUSE 31 GRY/GRN WIRE HOT AT ALL TIMES INFO DISPLAY MODULE INFOTAINMENT INSTRUMENT PANEL FUSE BLOCK LOGIC LOW SPEED GMLAN LVDS MEDIA DISC PLAYER MENU MUTE NEXT RADIO CONTROLS RED WIRE RED/LT BLU WIRE RED/VIO WIRE RED/WHT WIRE RIGHT STEERING WHEEL CONTROLS SWITCH SEEK DOWN SEEK UP SELECT SERIAL DATA 2 SERIAL DATA BUS 10 SERIAL DATA BUS 5 STEERING WHEEL AIR BAG COIL TALK USB VOL (-) W/ ONSTAR W/O ONSTAR W/ NAVIGATION W/O NAVIGATION WHT WIRE YEL WIRE

BATT POS VOLT BLK WIRE BLU WIRE BLU/BLK WIRE BLU/GRY WIRE BRN/BLU WIRE BRN/DK BLU WIRE COMPUTER DATA LINES SYSTEM DISPLAY DISPLAY SIG + DK BLU WIRE DK GRN/DK BLU WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE FUSE 16 FUSE 38 GRN WIRE GRN/BLK WIRE GRN/YEL WIRE GRY/GRN WIRE HOT AT ALL TIMES INFO DISPLAY MODULE INFOTAINMENT INSTRUMENT PANEL FUSE BLOCK LEFT FRONT DOOR SPEAKER LEFT FRONT TWEETER SPEAKER LEFT REAR WINDOW SHELF SPEAKER LOGIC LOW SPEED GMLAN LVDS MEDIA DISC PLAYER RADIO CONTROLS RED/BRN WIRE RED/LT BLU WIRE RED/VIO WIRE RED/YEL WIRE REPLICATED SERIAL DATA 2 SERIAL DATA BUS 10 SERIAL DATA BUS 5 SIG VIO/DK BLU WIRE WHT WIRE YEL WIRE YEL/BLK WIRE

BATT POS VOLT BLK WIRE BODY CONTROL MODULE (UNDER FLOOR CONSOLE) BRN/GRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROL MODULE FUSE 22 GRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRY WIRE GRY/BLK WIRE GRY/LT GRN WIRE HOOD AJAR SWITCH HOOD STATUS A SIG HOOD STATUS B SIG HOT AT ALL TIMES IMMOBILIZER CONTROL MODULE INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LO SPD GMLAN LOGIC NETWORK BUS 11 PPL RED/WHT WIRE SECURITY IND SERIAL DATA (-) (1) SERIAL DATA 2 VEH IMMOBILIZER CTRL VEH IMMOBILIZER LOW REF VEH SPLY VOLT W/ START/STOP SYSTEM WHT WIRE YEL WIRE

1-VT 2-VT BATT POS VOLT BLK WIRE BLK/YEL WIRE BRN WIRE CELLULAR PHONE NAVIGATION, DIGITAL RADIO ANTENNA COAX COMPUTER DATA LINES SYSTEM DISPLAY DISPLAY SIG + DK GRN/BLK WIRE DK GRN/DK BLU WIRE DK GRN/WHT WIRE FUSE 31 GRY/GRN WIRE HOT AT ALL TIMES INFO DISPLAY MODULE INFOTAINMENT INSTRUMENT PANEL FUSE BLOCK LOGIC LOW SPEED GMLAN LVDS MEDIA DISC PLAYER MENU MUTE NEXT RADIO CONTROLS RED WIRE RED/LT BLU WIRE RED/VIO WIRE RED/WHT WIRE RIGHT STEERING WHEEL CONTROLS SWITCH SEEK DOWN SEEK UP SELECT SERIAL DATA 2 SERIAL DATA BUS 10 SERIAL DATA BUS 5 STEERING WHEEL AIR BAG COIL TALK USB VOL (-) W/ ONSTAR W/O ONSTAR W/ NAVIGATION W/O NAVIGATION WHT WIRE YEL WIRE

BATT POS VOLT BLK WIRE BLU WIRE BLU/BLK WIRE BLU/GRY WIRE BRN/BLU WIRE BRN/DK BLU WIRE COMPUTER DATA LINES SYSTEM DISPLAY DISPLAY SIG + DK BLU WIRE DK GRN/DK BLU WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE FUSE 16 FUSE 38 GRN WIRE GRN/BLK WIRE GRN/YEL WIRE GRY/GRN WIRE HOT AT ALL TIMES INFO DISPLAY MODULE INFOTAINMENT INSTRUMENT PANEL FUSE BLOCK LEFT FRONT DOOR SPEAKER LEFT FRONT TWEETER SPEAKER LEFT REAR WINDOW SHELF SPEAKER LOGIC LOW SPEED GMLAN LVDS MEDIA DISC PLAYER RADIO CONTROLS RED/BRN WIRE RED/LT BLU WIRE RED/VIO WIRE RED/YEL WIRE REPLICATED SERIAL DATA 2 SERIAL DATA BUS 10 SERIAL DATA BUS 5 SIG VIO/DK BLU WIRE WHT WIRE YEL WIRE YEL/BLK WIRE

BATT POS VOLT BLK WIRE BLU/GRY WIRE BRN/DK BLU WIRE CENTER INSTRUMENT PANEL SPEAKER COMPUTER DATA LINES SYSTEM DISPLAY DISPLAY SIG + DK BLU WIRE DK BLU/YEL WIRE DK GRN WIRE DK GRN/BLK WIRE DK GRN/DK BLU WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE FUSE 16 FUSE 38 GRN/BLK WIRE GRY/GRN WIRE HOT AT ALL TIMES INFO DISPLAY MODULE INFOTAINMENT INSTRUMENT PANEL FUSE BLOCK LEFT FRONT DOOR SPEAKER LEFT FRONT TWEETER SPEAKER LEFT REAR DOOR SPEAKER LEFT SUBWOOFER SPEAKER LOGIC LOW SPEED GMLAN LVDS MEDIA DISC PLAYER RADIO CONTROLS RED/BRN WIRE RED/LT BLU WIRE RED/VIO WIRE RED/YEL WIRE REPLICATED SERIAL DATA 2 SERIAL DATA BUS 10 SERIAL DATA BUS 5 SIG VIO/DK BLU WIRE YEL/WHT WIRE

AUDIO/VIDEO INPUT ADAPTER BACKWARD BK LVDS BK USB BLK WIRE BRN/GRY WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DRIVER SEATBACK VIDEO DISPLAY FORWARD/ FUSE 39 FUSE 42 GRY/GRN WIRE GRY/VIO WIRE GY LVDS HEADPHONE HOT AT ALL TIMES HUMAN MACHINE INTERFACE CONTROL MODULE INSTRUMENT PANEL FUSE BLOCK LOGIC LOGIC AUXILIARY AUDIO INPUT LOGIC INFO DISPLAY MODULE LT BLU/VIO WIRE LT GRN/WHT WIRE LT GRN/YEL WIRE LVDS LVDS GY LVDS LVDS LVDS MEDIA DISC PLAYER NCA WIRE PASSENGER SEATBACK VIDEO DISPLAY RED/BLU WIRE RED/DK BLU WIRE RED/LT BLU WIRE RED/VIO WIRE SERIAL DATA 2 SERIAL DATA BUS 10 USB USB SERIAL DATA USB USB VIDEO+ VOLUME- WH LVDS WHT/GRN WIRE WHT/LT GRN WIRE WHT/VIO WIRE