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

AIR RECIRCULATION DOOR ACTUATOR BLK/YEL WIRE BLU/BRN WIRE BLU/YEL WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY ENGINE COOLANT TEMPERATURE GAUGE ENGINE COOLANT TEMPERATURE IND GRN WIRE GRY/GRN WIRE GRY/RED WIRE GRY/VIO WIRE INSTRUMENT CLUSTER LEFT AIR TEMPERATURE DOOR ACTUATOR LOGIC MODE DOOR ACTUATOR MOST SERIAL DATA (+) RED/WHT WIRE VIO/GRN WIRE WHT WIRE WHT/GRN WIRE WHT/GRY WIRE YEL/BLK WIRE YEL/BRN WIRE

AM/FM 1 AUXILIARY AUDIO INPUT BK USB BLK WIRE BLK/YEL WIRE BRN WIRE BU GPS COAX COAX BU GPS COAX GY GPS/CELL COAX PK GPS COAX VT GPS/CELL COMPUTER DATA LINES SYSTEM CU HD/XM DK GRN/DK BLU WIRE FM/RFR GRY/LT GRN WIRE GRY/VIO WIRE GY GPS LEFT STEERING WHEEL CONTROLS SWITCH LOCAL SERIAL DATA BUS 10 LOGIC LOW REF LOW SPEED GMLAN SERIAL DATA 2 MEDIA DISC PLAYER MOST CONTROL MOST SERIAL DATA (+) MUTE VOICE NAVIGATION ANTENNA SIGNAL SPLITTER (W/ CELL) (CENTER OF REAR WINDOW SHELF) NAVIGATION ANTENNA SIGNAL SPLITTER (W/O CELL) (CENTER OF REAR WINDOW SHELF) RADIO RADIO ANTENNA REAR ROOF ANTENNA RED/VIO WIRE RED/WHT WIRE REMOTE CONTROL DOOR LOCK RECEIVER RFR TELEPHONE VOICE SIG USB W/ ONSTAR W/O ONSTAR W/ NAVIGATION W/O NAVIGATION WHT WIRE WHT/LT GRN WIRE WHT/VIO WIRE YEL WIRE

AUDIO LOW REF AUDIO SIG + BATT POS VOLT BLK WIRE BLK/BRN WIRE BLK/GRY WIRE BLK/YEL WIRE BLU WIRE BLU/GRN WIRE BLUNT CUT) CAMERA SIG 2 CELL/CELL 1 CELLULAR PHONE MICROPHONE COAX COMMUNICATION ENABLE COMPUTER DATA LINES SYSTEM DK GRN/WHT WIRE FUSE 38 GMLAN SERIAL DATA (+) 9 GPS GPS/CELL 2 GRY/VIO WIRE GRY/YEL WIRE HOT AT ALL TIMES HUMAN MACHINE INTERFACE CONTROL MODULE (RIGHT SIDE OF DASH) INFOTAINMENT DISPLAY SIG INSTRUMENT PANEL FUSE BLOCK LOW REF LT BLU WIRE LVDS MICROPHONE SIG MOST CONTROL MOST SERIAL DATA (+) NAVIGATION SYSTEM NCA WIRE REAR VIEW CAMERA CIRCUIT RECOGNITION AUDIO SIG RED WIRE RED/LT BLU WIRE RED/VIO WIRE RED/YEL WIRE SERIAL DATA (-) 9 SERIAL DATA BUS 5 SHIELD USB USB SERIAL DATA VOICE LOW REF VOICE SIG W/ ONSTAR W/O ONSTAR W/ NAVIGATION W/O NAVIGATION WHT/BLU WIRE WHT/DK BLU WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE

BATT POS VOLT BATT POST VOLT BLK WIRE BRN/DK BLU WIRE COMPUTER DATA LINES SYSTEM DIMMING CONTROL DK BLU WIRE DK BLU/BLK WIRE DK GRN WIRE DK GRN/BLK WIRE FUSE 39 FUSE 42 GROUND GRY/GRN WIRE GRY/VIO WIRE HOT AT ALL TIMES INFOTAINMENT CONTROL TOUCHPAD INSTRUMENT PANEL FUSE BLOCK LEFT FRONT DOOR SPEAKER LEFT FRONT TWEETER SPEAKER LEFT REAR DOOR SPEAKER LF SPEAKER (+) (1) LF SPEAKER SIG (-) 1 LR SPEAKER (+) CTRL LR SPEAKER SIG (-) MOST CONTROL MOST SERIAL DATA (+) MOST SERIAL DATA (-) GMLAN SERIAL DATA 2 RADIO RED/BLU WIRE RED/LT BLU WIRE RED/VIO WIRE RF SPEAKER (+) (1) RF SPEAKER SIG (-) 1 RIGHT FRONT DOOR SPEAKER RIGHT FRONT TWEETER SPEAKER RIGHT REAR DOOR SPEAKER RR SPEAKER (+) CTRL RR SPEAKER SIG (-) SIG GND WHT WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE

AM/FM 1 AUXILIARY AUDIO INPUT BATT POS VOLT BLK WIRE BLU WIRE BLU/BLK WIRE BRN WIRE BRN/BLU WIRE COAX COAX BU GPS COAX GY GPS/CELL COAX PK GPS COAX VT GPS/CELL COMPUTER DATA LINES SYSTEM DK GRN/DK BLU WIRE FM/RFR GMLAN SERIAL DATA 2 GRN WIRE GRN/BLK WIRE GRN/YEL WIRE GRY/LT GRN WIRE GRY/VIO WIRE GY COAX GPS COAX HD/XM CU LEFT STEERING WHEEL CONTROLS SWITCH LF AUDIO LOW REF LF SPEAKER (-) CTRL 1 LF SPEAKER SIG (-) 1 LOGIC LR SPEAKER (+) CTRL LR SPEAKER SIG (-) 1 MEDIA DISC PLAYER MOST CONTROL MOST SERIAL DATA (+) NAVIGATION ANTENNA SIGNAL SPLITTER (W/ CELL) (CENTER OF REAR WINDOW SHELF) NAVIGATION ANTENNA SIGNAL SPLITTER (W/O CELL) (CENTER OF REAR WINDOW SHELF) NCA WIRE RADIO RADIO ANTENNA REAR ROOF ANTENNA RED/VIO WIRE RED/WHT WIRE REMOTE CONTROL DOOR LOCK RECEIVER REMOTE ENABLE SIG I RF SPEAKER (-) CTRL 1 RF SPEAKER SIG (-) 1 RFR RR SPEAKER (+) CTRL RR SPEAKER SIG (-) 1 SERIAL DATA BUS 10 USB USB BK USB USB W/ ONSTAR W/O ONSTAR W/ NAVIGATION W/O NAVIGATION WHT WIRE WHT/LT GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE

BATT POS VOLT BLK WIRE COMPUTER DATA LINES SYSTEM DIMMING CONTROL DK BLU/BLK WIRE FUSE 39 FUSE 42 GRN/VIO WIRE GROUND GRY/BLK WIRE GRY/GRN WIRE GRY/VIO WIRE HOT AT ALL TIMES ILL INFOTAINMENT CONTROL TOUCHPAD INSTRUMENT PANEL FUSE BLOCK MOST CONTROL MOST SERIAL DATA (+) MOST SERIAL DATA (-) GMLAN SERIAL DATA 2 RED/BLU WIRE RED/LT BLU WIRE RED/VIO WIRE RIGHT FRONT DOOR SPEAKER RIGHT FRONT TWEETER SPEAKER RIGHT REAR DOOR SPEAKER RIGHT REAR WINDOW SHELF SPEAKER WHT WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE

AM/FM 1 AUXILIARY AUDIO INPUT BK USB BLK WIRE BLK/YEL WIRE BRN WIRE COAX COAX BU GPS COAX GY GPS COAX COAX GY GPS/CELL COAX PK GPS COAX VT GPS/CELL COMPUTER DATA LINES SYSTEM CU HD/XM DK GRN/DK BLU WIRE FM/RFR GRY/LT GRN WIRE GRY/VIO WIRE LEFT STEERING WHEEL CONTROLS SWITCH LOCAL SERIAL DATA BUS 10 LOGIC LOW REF LOW SPEED GMLAN SERIAL DATA 2 MEDIA DISC PLAYER MOST CONTROL MOST SERIAL DATA (+) NAVIGATION ANTENNA SIGNAL SPLITTER (W/ CELL) (CENTER OF REAR WINDOW SHELF) NAVIGATION ANTENNA SIGNAL SPLITTER (W/O CELL) (CENTER OF REAR WINDOW SHELF) RADIO RADIO ANTENNA REAR ROOF ANTENNA RED/VIO WIRE RED/WHT WIRE REMOTE CONTROL DOOR LOCK RECEIVER RFR TELEPHONE VOICE SIG USB USB USB W/ ONSTAR W/O ONSTAR W/ NAVIGATION W/O NAVIGATION WHT WIRE WHT/LT GRN WIRE WHT/VIO WIRE YEL WIRE

AUDIO LOW REF AUDIO SIG + BATT POS VOLT BLK WIRE BLK/BRN WIRE BLK/GRY WIRE BLK/YEL WIRE BLU WIRE BLU/GRN WIRE BLUNT CUT) CAMERA SIG 2 CELL/CELL 1 CELLULAR PHONE MICROPHONE COAX COMMUNICATION ENABLE COMPUTER DATA LINES SYSTEM DK GRN/WHT WIRE GMLAN SERIAL DATA (+) 9 GPS GPS/CELL 2 GRY/VIO WIRE GRY/YEL WIRE HUMAN MACHINE INTERFACE CONTROL MODULE (RIGHT SIDE OF DASH) INFOTAINMENT DISPLAY SIG LOW REF LT BLU WIRE LVDS MICROPHONE SIG MOST CONTROL MOST SERIAL DATA (+) NAVIGATION SYSTEM NCA WIRE REAR VIEW CAMERA CIRCUIT RECOGNITION AUDIO SIG RED WIRE RED/VIO WIRE RED/YEL WIRE SERIAL DATA (-) 9 SERIAL DATA BUS 5 SHIELD USB USB SERIAL DATA VOICE LOW REF VOICE SIG W/ ONSTAR W/O ONSTAR W/ NAVIGATION W/O NAVIGATION WHT/BLU WIRE WHT/DK BLU WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE

AUDIO AMPLIFIER BATT POS VOLT BLK WIRE BLU/BLK WIRE BLU/GRY WIRE BLU/YEL WIRE BRN/DK BLU WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/BLK WIRE DK BLU/YEL WIRE DK GRN WIRE DK GRN/BLK WIRE FC SPEAKER CTRL (+) GMLAN SERIAL DATA 2 GRN/BLK WIRE GRN/BRN WIRE GRN/VIO WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/VIO WIRE LEFT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE LF SPEAKER (-) CTRL 1 LF SPEAKER SIG (-) 1 LR SPEAKER (+) CTRL LR SPEAKER SIG (-) MICROPHONE 1 LOW REF MICROPHONE 1 SIG MICROPHONE 2 LOW REF MICROPHONE 2 SIG MICROPHONE 3 LOW REF MICROPHONE 3 SIG MOST CONTROL MOST SERIAL DATA (+) REAR RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RED/BRN WIRE RED/LT BLU WIRE RED/VIO WIRE REPLICATED SIG RF SPEAKER (-) CTRL 1 RF SPEAKER SIG (-) 1 RIGHT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RR SPEAKER (+) CTRL RR SPEAKER SIG (-) SPEAKER (-) LOW REF SPEAKER CTRL (+) VIO/DK BLU WIRE WHT WIRE WHT/BLK WIRE WHT/LT GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE YEL/WHT WIRE

BATT POS VOLT BLK WIRE COMPUTER DATA LINES SYSTEM DIMMING CONTROL DK BLU/BLK WIRE FUSE 39 FUSE 42 GRN/VIO WIRE GROUND GRY/BLK WIRE GRY/GRN WIRE GRY/VIO WIRE HOT AT ALL TIMES INFOTAINMENT CONTROL TOUCHPAD INSTRUMENT PANEL FUSE BLOCK LEFT REAR TRIM PANEL SPEAKER MOST CONTROL MOST SERIAL DATA (+) MOST SERIAL DATA (-) GMLAN SERIAL DATA 2 RED/BLU WIRE RED/LT BLU WIRE RED/VIO WIRE RIGHT FRONT DOOR SPEAKER RIGHT FRONT TWEETER SPEAKER RIGHT REAR DOOR SPEAKER RIGHT REAR TRIM PANEL SPEAKER RIGHT SUBWOOFER SPEAKER WHT WIRE WHT/BLK WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE