Buick LaCrosse II (2009-2013) (bottom of "a" pillar) Wiring diagrams

11 12 IGNITION MODE SW CTRL LOW REFERENCE 2.4L 3.0L, 3.6L ACC IND BLK WIRE BLK/BRN WIRE BODY CONTROL MODULE BRN WIRE CONTROL SOLENOID VALVE ASSEMBLY DK BLU WIRE ENGINE CONTROL MODULE FROM INSTRUMENT PANEL FUSE BLOCK (DIAGRAM 2 OF 5) FUSE FUSE IGNITION MODE SWITCH IGNITION SWITCH KEY-IN IGNITION SWITCH KEYLESS ENTRY CONTROL MODULE LEFT SIDE RIGHT SIDE OBJECT OBJECT SENSOR SENSOR (IF (IF EQUIPPED) EQUIPPED) LT GRN WIRE LT GRN/VIO WIRE LT GRN/YEL WIRE OFF OFF IND OUTSIDE PASSENGER REARVIEW WINDOW MIRROR SWITCH SWITCH PPL PPL (OR VIO/BLK) WIRE PPL (OR VIO/YEL) WIRE PPL PPL PPL PPL 3 4 ACC VOLT RUN/CRANK 1 VOLT RED WIRE RED/DK BLU WIRE RED/LT GRN WIRE RED/VIO WIRE RUN WIRE START IND UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/BLK WIRE VIO/YEL WIRE W/ KEYLESS ENGINE START W/ MEMORY W/ SUNSHADE W/O SUNSHADE WHT WIRE YEL WIRE

4 6 NETWORK BUS 3 AJAR SW SIG AJAR SW SIG ANT LO REF (2) ANT LO REF (5) ANT SIG (2) BLK WIRE BLK/BRN WIRE BLK/LT GRN WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM LOGIC DK BLU WIRE DK BLU/VIO WIRE DOOR HANDLE TOUCH SENSOR DR LK CTRL SW LK SIG ANT SIG (5) DRIVER DOOR HANDLE KEYLESS ENTRY ANTENNA DRIVER DOOR LATCH ASSEMBLY DRIVER EXTERIOR DOOR HANDLE ASSEMBLY DRIVER EXTERIOR DOOR HANDLE SWITCH DRIVER EXTERIOR DOOR HANDLE TOUCH SENSOR 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/DK BLU WIRE GRY/YEL WIRE INSTRUMENT CLUSTER KEYLESS ENTRY CONTROL MODULE (RIGHT KICK PANEL) LEFT REAR EXTERIOR DOOR HANDLE SWITCH LT GRN WIRE LT GRN/WHT WIRE NETWORK BUS 3 ORG/ WIRE PACK) PASS DR SW LK CTRL ANT SIG (1) ANT LO REF (1) PASSENGER DOOR HANDLE KEYLESS ENTRY ANTENNA PASSENGER EXTERIOR PASSENGER EXTERIOR DOOR HANDLE ASSEMBLY PASSENGER EXTERIOR DOOR HANDLE SWITCH PASSENGER WINDOW MOTOR (FRONT PASSENGER'S DOOR) PPL PPL PASS DR UNLATCH SW SIG DRV DR UNLATCH SW SIG REAR FASCIA KEYLESS ENTRY ANTENNA (BEHIND REAR BUMPER) RED WIRE RIGHT REAR EXTERIOR DOOR HANDLE SWITCH STATUS CTRL UNLOCK SIGNAL VIO/DK BLU WIRE VIO/GRY WIRE WHT WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/DK BLU WIRE YEL/VIO WIRE

1 2 8 VOICE SIGNAL LOW REF DRAIN WIRE 16 1 B+ SERIAL DATA 5149 5152 1792 (UYS) (UYS) (UYS) 5340 5060 COMPUTER DATA LINES SYSTEM 6 12 5 VOICE SIGNAL LOW REF DRAIN WIRE BLK WIRE BLK/GRY WIRE BLK/YEL WIRE CELLULAR PHONE NAVIGATION, DIGITAL RADIO ANTENNA CENTER SIG CGI - COAX COMPUTER DATA LINES SYSTEM DRAIN WIRE GRN WIRE GRN/BLU WIRE GROUND GRY WIRE GRY/YEL WIRE LOGIC LT GRN/YEL WIRE NAVIGATION ANTENNA SIGNAL SPLITTER NCA WIRE NETWORK 10 PPL RED/DK BLU WIRE RED/VIO WIRE RESET SIG TELEMATICS COMMUNICATIONS INTERFACE CONTROL MODULE VIO WIRE W/ UYS W/O UYS YEL WIRE

16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LOW LVL AUDIO (-) CENTER AUDIO SIG (-) 8 7 6 5 4 3 2 1 GROUND RIGHT SPEAKER - LEFT REAR SPEAKER - AUDIO AMPLIFIER (RIGHT SIDE OF TRUNK) BATT POS VOLT RIGHT SPEAKER + LEFT REAR SPEAKER + BLK WIRE BRN/DK BLU WIRE BRN/VIO WIRE BRN/WHT WIRE DK BLU WIRE DK BLU/BLK WIRE DK BLU/BRN WIRE DK BLU/GRY WIRE DK BLU/VIO WIRE DK BLU/YEL WIRE FUSE GRY/BLK WIRE HOT AT ALL TIMES HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) INSTRUMENT PANEL CENTER SPEAKER LEFT FRONT DOOR SPEAKER LEFT REAR LEFT FRONT DOOR TWEETER SPEAKER SPEAKER LEFT SUBWOOFER SPEAKER LT GRN WIRE LT GRN/BLK WIRE LT GRN/DK BLU WIRE LT GRN/VIO WIRE LT GRN/YEL WIRE NCA WIRE RED WIRE RED/YEL WIRE RIGHT FRONT DOOR SPEAKER RIGHT FRONT TWEETER SPEAKER RIGHT REAR LEFT REAR DOOR WINDOW SHELF SPEAKER SPEAKER RIGHT REAR WINDOW SHELF SPEAKER RIGHT SUBWOOFER SPEAKER RR LO LVL SIG (-) LR LO LVL SIG (-) FRT LO LVL SIG (-) LF LO LVL SIG (-) UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/BLK WIRE VIO/DK BLU WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE YEL/WHT WIRE

AJAR AJAR SW SIG BLK WIRE BLK/ORG WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRAKE IND BRN WIRE BRN/GRN WIRE BUS 4 COMPUTER DATA LINES SYSTEM DK BLU RED/ WIRE DK BLU WIRE DK BLU/ WHT WIRE DK BLU/BLK WIRE DK BLU/VIO WIRE DK GRN/GRY WIRE DRIVER DOOR LATCH ASSEMBLY DRIVER INFORMATION CENTER DISPLAY DRIVER SEAT BELT BUCKLE DRIVER SEAT BELT SWITCH DRIVER WINDOW MOTOR DRIVER WINDOW SWITCH DRIVER'S DOOR FUSE FUSE (LOWER LEFT SIDE OF DASH) GMLAN SERIAL DATA GRN WIRE GRN/GRY WIRE GRN/YEL WIRE GROUND GRY DK GRN WIRE GRY WIRE GRY/RED WIRE HEAD PARK AUTO OFF HEADLAMP SW PRK LAMP SIG HEADLAMP SWITCH HOT AT ALL TIMES INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) (BELOW CENTER CONSOLE) INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR WINDOW SWITCH LO SPD GMLAN SER DATA LOGIC LOW ENGINE OIL PRESSURE IND LOW SPD GMLAN SER DATA SER DATA COMMUNICATION ENABLE LOW TIRE PRESSURE IND LT BLU WIRE LT GRN WIRE NCA WIRE NETWORK NETWORK BUS 3 NETWORK BUS 4 OFF KEY IGNITION SWITCH IGNITION SWITCH (RIGHT SIDE OF STEERING COLUMN) OFF/RUN/ CRANK VOLT ORG/BRN WIRE PARK BRAKE CONTROL SWITCH (ON PARK BRAKE ASSEMBLY) PARKING BRAKE CONTROL MODULE (BEHIND LEFT REAR WHEEL LINER) PASSENGER DOOR LATCH ASSEMBLY PASSENGER WINDOW MOTOR (FRONT PASSENGER'S DOOR) PRK BRK APPLY SW VOLT REF PRK BRK SW SUP VOLT PRK BRK SW SUPP VOLT PRK BRK SW RELEASE SIG PRK BRK SW APPLY SIG RED/DK BLU WIRE RED/DK GRN WIRE RED/LT GRN WIRE RIGHT REAR DOOR LATCH ASSEMBLY RIGHT REAR WINDOW SWITCH RUN WIRE SEAT BELT IND SEAT BELT SW LOW REF SEAT BELT SW SIG SER DATA COMMUNI- LVL CATION SENS ENABLE SIG SERIAL DATA COMMUNIC- ATION ENABLE PRK BRK SW SIG SPLICE PACK) (BOTTOM OF "A" PILLAR) SW SIG VIO/ DK BLU WIRE WHT WIRE WHT/DK BLU WIRE WHT/YEL WIRE YEL WIRE YEL/RED WIRE