Buick LaCrosse II (2009-2013) run Wiring diagrams

1969 28 HEADLIGHTS SYSTEM HORNS SYSTEM 2500 2501 COMPUTER DATA LINES SYSTEM 5077 7541 STARTING/CHARGING SYSTEM EXTERIOR LIGHTS SYSTEM 5797 6132 TRUNK, TAILGATE, FUEL DOORS SYSTEM COMPUTER DATA LINES SYSTEM 5911 3271 2150 294 1303 DOOR LOCKS SYSTEM 6133 6134 COMPUTER DATA LINES SYSTEM BATTERY BLK WIRE BLK/VIO WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE BRN/GRY WIRE BRN/LT GRN WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CHILD SECURITY LCK MTR SHIFT POSITION SIG CHILD SECURITY LOCK RLY CTRL COLUMN) DK BLU WIRE DK BLU/VIO WIRE DK BLU/WHT WIRE DOOR LOCK CONTROL CHILD SECURITY LCK MTR COURTESY LAMP SW SIG DOOR LOCKS SYSTEM DOOR LOCKS SYSTEM DOOR LOCKS SYSTEM INTERIOR LIGHTS SYSTEM DOOR LOCKS SYSTEM SHIFT INTERLOCK SYSTEM DOOR LOCKS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM FOG LAMP RELAY CONTROL LIFT GLASS/TRUNK RELEASE CTRL CRUISE/ETC/TCC BRAKE SIGNAL GRN/BLU WIRE GRN/BRN WIRE GRN/YEL WIRE GROUND GRY WIRE GRY/BRN WIRE GRY/LT GRN WIRE GRY/YEL WIRE HEADLAMP HIGH BEAM RLY CTRL HORN RLY CTRL HEADLIGHTS SYSTEM HI SPEED GMLAN DATA BUS (+) HI SPEED GMLAN DATA BUS (-) HOT AT ALL TIMES IGNITION SWITCH INTERCONNECT NETWORK BUS 2 INTERCONNECT NETWORK BUS 3 INTERIOR LIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM KEY-IN IGNITION SWITCH LED AMBIENT LIGHTING CTRL 1 LOW REFERENCE STOP LAMP SPLY VOLT LT GRN/GRY WIRE LT GRN/RED WIRE LT GRN/VIO WIRE LT GRN/WHT WIRE OFF POWER DISTRIBUTION SYSTEM PPL PPL PPL RED/LT GRN WIRE RED/WHT WIRE RR CLOSURE HANDLE SW OPEN SIG INTERCONNECT NETWORK BUS 1 RUN RELAY COIL CONTROL RUN WIRE STARTING/CHARGING SYSTEM STARTING/CHARGING SYSTEM COMPUTER DATA LINES SYSTEM VIO/GRY WIRE VIO/YEL WIRE WHT WIRE WHT/BRN WIRE WHT/DK BLU WIRE WHT/VIO WIRE WHT/YEL WIRE WINDSHIELD WIPER SW HI SIG WIPER/WASHER SYSTEM YEL WIRE

BLK WIRE BLK/WHT WIRE CENTER HIGH MOUNTED STOP LAMP DOME/ READING LAMPS DRIVER SEAT ADJUSTER DRIVER SEAT LUMBAR SUPPORT DRIVER SEAT LUMBAR SUPPORT PUMP SWITCH DRIVER SEAT LUMBAR SUPPORT VALVE ASSEMBLY SWITCH EXTERIOR REAR COMPARTMENT LID UNLATCH SWITCH FRONT DOME/ READING LAMPS LEFT REAR SIDE MARKER LAMP LEFT REAR TURN SIGNAL LAMP LEFT RIGHT LICENSE LICENSE LEFT PLATE PLATE BACKUP LAMP LAMP LAMP LEFT SIDE OBJECT SENSOR LEFT TAIL LAMP LEFT TAIL/ STOP/ TURN SIGNAL LAMP PARKING BRAKE CONTROL MODULE PNK/WHT WIRE REAR COMPARTMENT COURTESY LAMP REAR COMPARTMENT LID LATCH REAR PARKING ASSIST CONTROL MODULE RIGHT LEFT SUNSHADE SUNSHADE MIRROR MIRROR LAMP LAMP RIGHT SIDE OBJECT SENSOR RUN WIRE W/ LEFT HAND POWER LUMBAR SEAT W/O LEFT HAND POWER LUMBAR SEAT W/O REAR PARKING ASSIST

BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE FUSE GROUND GRY WIRE HEATED STEERING WHEEL ON IND HEATED STEERING WHEEL SWITCH HOT AT ALL TIMES HTD WHL FUSE IGN 3 VOLT IGNITION LOGIC RADIO/HVAC CONTROLS REAR BODY FUSE BLOCK (ON LEFT REAR WHEELHOUSE) RED WIRE RED/WHT WIRE RELAY RUN RLY COIL CTRL RUN WIRE SENSOR SIG STEERING COLUMN FUSE HOLDER STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATER STEERING WHEEL HEATING CONTROL MODULE (INSIDE STEERING WHEEL) SW LED CTRL SW SIG VIO WIRE VIO/BRN WIRE VOLT REF YEL WIRE

BLK WIRE BODY CONTROL MODULE BRN WIRE DRIVER DRIVER BACK CUSHION SEAT SEAT BLOWER BLOWER MOTOR ASSEMBLY DRIVER SEATBACK VIDEO DISPLAY FROM BATTERY FUSE BLOCK (DIAGRAM 1 OF 5) FROM IGNITION MAIN RELAY (DIAGRAM 4 OF 5) FUSE HTD WHL FUSE IGNITION IGNITION MAIN RELAY KEYLESS ENTRY CONTROL MODULE (IF EQUIPPED) LT GRN/VIO WIRE PASSENGER BACK SEAT BLOWER MOTOR PASSENGER CUSHION SEAT BLOWER MOTOR PASSENGER SEATBACK VIDEO DISPLAY PNK WIRE REAR BODY FUSE BLOCK (ON LEFT REAR WHEELHOUSE) REAR DIFFERENTIAL CLUTCH CONTROL MODULE REAR WINDOW SUNSHADE CONTROL MODULE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/BRN WIRE RED/DK BLU WIRE RED/GRY WIRE RED/WHT WIRE RED/YEL WIRE RELAY RUN WIRE STEERING COLUMN FUSE HOLDER STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATING CONTROL MODULE (IF EQUIPPED) SUSPENSION CONTROL MODULE VIO WIRE VIO/BLK WIRE W/ CLIMATE CONTROL W/ DRIVER SEAT W/ HEATED STEERING WHEEL W/ PASSENGER SEAT W/ REAR SEAT ENTERTAINMENT W/O CLIMATE CONTROL

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

AUTOMATIC TRANSMISSION ASSEMBLY AUTOMATIC TRANSMISSION INTERNAL MODE SWITCH BATTERY (LEFT SIDE OF ENGINE) BATTERY FUSE BLOCK (TOP OF BATTERY) FUSE BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) CHARGING CIRCUIT COMPUTER DATA LINES SYSTEM CONTROL SOLENOID ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) EXCEPT 2.4L 2.4L FUSE GMLAN SERIAL DATA GRN WIRE GROUND GRY WIRE IGN VOLT IGNITION SWITCH LOCK PARK/NEUTRAL SIG (1) RED WIRE RUN WIRE SERIAL DATA STARTER MOTOR STARTER RELAY STARTER RELAY CTRL TRANSMISSION CONTROL MODULE UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VALVE ASSEMBLY VIO/GRY WIRE VIO/YEL WIRE WHT WIRE WHT/GRY WIRE YEL 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