Buick LaCrosse II facelift (2013-2016) blu Wiring diagrams

"A" PILLAR) BLK WIRE BLU WIRE BRN WIRE DOWN 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 LUMBAR SUPPORT PUMP DRIVER SEAT LUMBAR SUPPORT VALVE ASSEMBLY DRIVER SEAT REAR VERTICAL MOTOR (UNDER RIGHT REAR CORNER OF DRIVER SEAT) DRIVER SEAT RECLINE MOTOR (LOWER RIGHT SIDE OF DRIVER SEAT BACK) DRVR/SEAT CIRCUIT BREAKER GND UP MTR GRN WIRE GRY WIRE HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) LOGIC RECLINE FWD RECLINE RWD RED WIRE RWD VIO WIRE WHT WIRE YEL WIRE YEL/WHT WIRE

1 2 SERIAL DATA (-) SERIAL DATA (+) AM/FM AUX AUDIO COM SIG AUX DET SIG BATT + BLK WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/WHT WIRE BUS 12 COAX COMPUTER DATA LINES SYSTEM CTRL GMLAN SERIAL DATA GRN WIRE GRN/BLU WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/VIO WIRE HANG UP IND DIMMING INSTRUMENT CLUSTER LED CTRL LEFT STEERING WHEEL CONTROLS SWITCH LOGIC LOW REF MOST CTRL NCA WIRE NETWORK NETWORK BUS 10 ORG/ WIRE ORG/VIO WIRE PNK 10 4 5 6 WIRE PNK WIRE RADIO RED/BLU WIRE RED/VIO WIRE RIGHT RIGHT STEERING WHEEL CONTROLS SWITCH SEEK + MUTE SEEK+ VOL+ SERIAL DATA SIG SOURCE SPEAK SIG STEERING STEERING WHEEL AIR BAG COIL VIO WIRE VOICE LEFT VOICE SIG VOL (-) WHEEL SW WHT/GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE

1 2 8 VOICE SIGNAL LOW REF DRAIN WIRE 15 10 12 B+ SERIAL DATA 1+ SERIAL DATA 1- 24 25 SERIAL DATA (-) 1 SERIAL DATA (+) 1 6 12 5 VOICE SIGNAL LOW REF DRAIN WIRE BACKUP LAMP SPLY VOLT BLK WIRE BLK/GRY WIRE BLK/YEL WIRE BLU WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE CELLULAR PHONE NAVIGATION, DIGITAL RADIO ANTENNA COAX COAX BU GPS COAX GY GPS/CELL COAX VT GPS/CELL COMPUTER DATA LINES SYSTEM GRN/WHT WIRE GROUND GRY/YEL WIRE NAVIGATION ANTENNA SIGNAL SPLITTER NCA WIRE PU COAX GPS RED/BLU WIRE RED/VIO WIRE TELEMATICS COMMUNICATIONS INTERFACE CONTROL MODULE W/ NAVIGATION W/ ONSTAR W/O NAVIGATION WHT WIRE YEL WIRE

AUXILIARY AUDIO INPUT BATT + BDY RC IGN FUSE BLK WIRE BLK/GRY WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BUS 10 NETWORK BUS 5 NETWORK CAMERA SHIELD CAMERA SIG (-) CAMERA SIG 2 COAX COMPUTER DATA LINES SYSTEM DISPLAY DISPLAY SIG + EXTENSION GMLAN LOW SPD GRN WIRE GRN/BLU WIRE GRN/WHT WIRE GROUND GRY WIRE GRY/VIO WIRE GRY/YEL WIRE HOT W/ IGNITION RELAY ENERGIZED HUMAN MACHINE INTERFACE CONTROL MODULE IGN 1 VOLT INFO DISPLAY MODULE LOGIC LOW REF MOST CTRL NAVIGATION NAVIGATION DISPLAY SIG NCA WIRE NETWORK BUS 5 RADIO CONTROLS REARVIEW CAMERA RED WIRE RED/BLU WIRE RED/VIO WIRE SERIAL DATA SERIAL DATA (-) (1) SPLY VOLT UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) USB VIO WIRE VIO/BLK WIRE VOICE AUD SIG WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE

1 2 SERIAL DATA (-) SERIAL DATA (+) AM/FM AUX AUDIO COM SIG AUX DET SIG BATT + BLK WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/DK BLU WIRE BRN/WHT WIRE BUS 12 COAX COAX 1 2 3 4 5 6 7 8 9 COMPUTER DATA LINES SYSTEM CTRL DK BLU WIRE DK BLU/BLK WIRE GMLAN SERIAL DATA GRN WIRE GRN/BLU WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/VIO WIRE HANG UP IND DIMMIMG INSTRUMENT CLUSTER LED CTRL LEFT STEERING WHEEL CONTROLS SWITCH LOGIC LOW REF LT FT SPKR 1+ LT FT SPKR SIG 1- LT GRN WIRE LT GRN/BLK WIRE LT RR SPKR LT RR SPKR SIG - MOST CTRL NCA WIRE NETWORK NETWORK BUS 10 ORG/ WIRE ORG/VIO WIRE PNK 10 4 5 6 WIRE PNK WIRE RADIO RED/BLU WIRE RED/VIO WIRE RIGHT RIGHT STEERING WHEEL CONTROLS SWITCH RT FT SPKR 1+ RT FT SPKR SIG 1- RT RR SPKR RT RR SPKR SIG - SEEK SEEK+ VOL+ SERIAL DATA SIG SOURCE MUTE SPEAK SIG STEERING STEERING WHEEL AIR BAG COIL VIO WIRE VOICE LEFT VOICE SIG VOL (-) WHEEL SW WHT WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE

BLK WIRE BLU WIRE BRN WIRE DN FWD DOWN FWD DOWN GRN WIRE HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) PASS/SEAT CIRCUIT BREAKER PASSENGER SEAT ADJUSTER SWITCH PASSENGER SEAT FRONT VERTICAL MOTOR (UNDER LEFT FRONT CORNER OF PASSENGER SEAT) PASSENGER SEAT RECLINE MOTOR (LOWER LEFT SIDE OF FRONT PASSENGER SEAT BACK) RECLINE FWD RECLINE RWD RED WIRE RWD VIO WIRE WHT WIRE YEL WIRE

11 12 IGNITION MODE SW CTRL LOW REFERENCE 22 15 5 6 IGN KEY SIG OFF/RUN/CRANK VOL ACC VOLY RUN/CRANK IGN VOLT 3 4 ACC VOLT RUN/CRANK 1 VOLT 8 20 ACC LED SIG START LED SIG ACC IND AWD/SADS FUSE BLK WIRE BLK/BRN WIRE BLU WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE DK BLU/BLK WIRE ENGINE START/ STOP EXCEPT HYBRID FROM FROM INSTRUMENT PANEL FUSE BLOCK (DIAGRAM 2 OF 5) FUSE (DIAGRAM 2 OF 5) GARAGE DOOR OPENER (IF EQUIPPED) GRN WIRE GRN/VIO WIRE GRN/YEL WIRE GRY WIRE IGNITION MODE SWITCH (W/ KEYLESS ENGINE START) IGNITION SWITCH (W/O KEYLESS ENGINE START) ILL KEY-IN IGNITION SWITCH KEYLESS ENTRY CONTROL MODULE LOGIC HYBRID/ EV BATTERY PACK COOLING FAN LRR LDW FUSE MIR EWL FR FUSE MODE VOL- OBST DETCT FUSE OFF OUTSIDE REARVIEW MIRROR SWITCH P-P BLOWER FUSE PASSENGER WINDOW SWITCH REAR DIFFERENTIAL CLUTCH DRIVER CONTROL WINDOW MODULE SWITCH REAR PARKING LEFT SIDE ASSIST OBJECT CONTROL SENSOR MODULE MODULE (IF EQUIPPED) RED WIRE RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/YEL WIRE RIGHT SIDE OBJECT SENSOR MODULE (IF EQUIPPED) RR HTD ST FUSE RUN WIRE RUN/CRANK RLY COIL CTRL START IND SUSPENSION CONTROL MODULE TO UNDERHOOD FUSE BLOCK (DIAGRAM 2 OF 5) UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/BLK WIRE VIO/YEL WIRE W/ KEYLESS ENGINE START W/ MEMORY W/ SUSPENSION W/O SUSPENSION WHT WIRE YEL WIRE

4 6 NETWORK BUS 3 AJAR SW SIG ACTR RECEIVE SIG ACTR RTN ACTR SPLY VOLT ACTR TRANSMIT SIG AJAR SW SIG ANT LO REF (2) ANT LO REF (5) ANT SIG (1) ANT LO REF (1) ANT SIG (2) ANT SIG (5) BLK WIRE BLK/BRN WIRE BLK/LT GRN WIRE BLK/YEL WIRE BLU WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM LOGIC DK BLU WIRE DK BLU/VIO WIRE DRIVER DOOR LATCH ASSEMBLY DRIVER EXTERIOR DOOR HANDLE SWITCH DRIVER INFORMATION CENTER DISPLAY SECURITY IND DRIVER WINDOW MOTOR (DRIVER'S DOOR) DRIVER WINDOW SWITCH GMLAN SERIAL DATA GRN WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE GRY/DK BLU WIRE GRY/YEL WIRE INSTRUMENT CLUSTER KEYLESS ENTRY ANTENNA KEYLESS ENTRY CONTROL MODULE (RIGHT KICK PANEL) LEFT REAR EXTERIOR DOOR HANDLE ASSEMBLY LEFT REAR EXTERIOR DOOR HANDLE SWITCH LT GRN WIRE LT GRN/WHT WIRE LT GRN/YEL WIRE NETWORK BUS 3 ORG/ WIRE PACK) PASS DR UNLATCH SW SIG DRV DR UNLATCH SW SIG PASSENGER DOOR HANDLE KEYLESS ENTRY ANTENNA PASSENGER EXTERIOR DOOR HANDLE SWITCH PASSENGER WINDOW MOTOR (FRONT PASSENGER'S DOOR) REAR FASCIA KEYLESS ENTRY ANTENNA (IF EQUIPPED) (BEHIND REAR BUMPER) RED WIRE REMOTE CONTROL DOOR LOCK RECEIVER (ON PASSENGER SIDE C-PILLAR) RIGHT REAR EXTERIOR DOOR HANDLE ASSEMBLY RIGHT REAR EXTERIOR DOOR HANDLE SWITCH STATUS CTRL UNLOCK SIGNAL VIO WIRE VIO/GRY WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE YEL/DK BLU WIRE

BLK WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN/WHT WIRE BRN/YEL WIRE DEFOGGER SYSTEM DK BLU WIRE DK BLU/VIO WIRE DRIVER OUTSIDE REARVIEW MIRROR DRIVER OUTSIDE REARVIEW MIRROR COURTESY LAMP DRIVER OUTSIDE REARVIEW MIRROR GLASS DRIVER OUTSIDE REARVIEW MIRROR LAMP ASSEMBLY DRIVER OUTSIDE REARVIEW MIRROR MOTOR DRIVER SIDE OBJECT DETECTION INDICATOR ELECTROCHROMIC MIRROR CIRCUIT FOLDING MOTOR GRN WIRE GRN/VIO WIRE GRY WIRE GRY/GRN WIRE GRY/VIO WIRE GRY/YEL WIRE LEFT TURN SIGNAL REPEATER LAMP LT BLU/WHT WIRE LT GRN WIRE MIRROR DIMMING NAVIGATION SYSTEM ORG/BLK WIRE PASSENGER OUTSIDE REARVIEW MIRROR PASSENGER OUTSIDE REARVIEW MIRROR COURTESY LAMP PASSENGER OUTSIDE REARVIEW MIRROR GLASS PASSENGER OUTSIDE REARVIEW MIRROR LAMP ASSEMBLY PASSENGER OUTSIDE REARVIEW MIRROR MOTOR PASSENGER SIDE OBJECT DETECTION INDICATOR RIGHT TURN SIGNAL REPEATER LAMP SPLICE PACK VIO WIRE YEL WIRE YEL/GRN WIRE YEL/GRY WIRE YEL/LT GRN WIRE YEL/WHT WIRE

1 2 3 4 5 6 7 8 9 10 11 12 B+ GND SW LOW REF BLK WIRE BLU WIRE BRN WIRE CLOSE COMPUTER DATA LINES SYSTEM DK BLU WIRE EXPRESS CLOSE EXPRESS OPEN GRN WIRE GRY WIRE HOT AT ALL TIMES INTERCONNECT BUS 1 SW DAT 1 LOGIC LT BLU WIRE RED/GRY WIRE RED/WHT WIRE SUNROOF CONTROL MODULE (BEHIND ROOF CONSOLE) SUNROOF FUSE SUNROOF SUNSHADE MOTOR MODULE (REAR OF SUNROOF) SUNROOF SUNSHADE SWITCH SUNROOF SWITCH SW SIG UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) YEL WIRE