Buick LaCrosse II (2009-2013) blk/wht Wiring diagrams

1 2 3 4 5 6 7 8 9 10 11 12 13 14 B+ GND 2139 5985 2501 COMPUTER DATA LINES SYSTEM AUTOMATIC TRANSMISSION ASSEMBLY BLK WIRE BLK/WHT WIRE BLU WIRE BODY CONTROL MODULE (BCM) (LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM CONTROL SOLENOID DK BLU WIRE DRIVER INFORMATION CENTER (DIC) ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT) FUSE GMLAN SERIAL DATA BUS + GRN WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/VIO WIRE HDLP SW HDLPS OFF SIG CTRL PPL HI SPD GMLAN SER DATA (+) HI SPD GMLAN SER DATA (+) HI SPD GMLAN SER DATA (-) HOT AT ALL TIMES HOT AT ALL TIMES UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) HOT W/ IGNITION MAIN RELAY ENERGIZED IGN IGN 1 VOLT WAKEUP SERIAL DATA HI SPD GMLAN SER DATA (-) INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) ISS ISS LOW HIGH LOGIC GMLAN LOW REF OSS OSS HIGH LOW P/N PARK/ NEUTRAL SIG PC 1 SOLENOID PC 2 SOLENOID PC 3 SOLENOID PC 4 SOLENOID PC 5 SOLENOID POWER DISTRIBUTION SYSTEM PPL PRESSURE CONTROL (PC) SOLENOID VALVE 1 PRESSURE CONTROL (PC) SOLENOID VALVE 2 PRESSURE CONTROL (PC) SOLENOID VALVE 3 PRESSURE CONTROL (PC) SOLENOID VALVE 4 PRESSURE CONTROL (PC) SOLENOID VALVE 5 RAP RELAY COIL CTRL RAP RLY COIL CTRL RED WIRE RED/DK GRN WIRE RED/WHT WIRE SHIFT SOLENOID (SS) VALVE 1 SHIFT SOLENOID (SS) VALVE 2 SS 1 SS 2 TAP UP/TAP DOWN SWITCH TCC SOLENOID TFP 1 TFP 3 TFP 4 TFP 5 TFT TORQUE CONVERTER CLUTCH PRESSURE CONTROL SOLENOID VALVE TRANS ENABLE SWITCH TRANSMISSION CONTROL MODULE (TCM) TRANSMISSION FLUID PRESSURE MANUAL VALVE POSITION SWITCH TRANSMISSION FLUID TEMPERATURE SENSOR TRANSMISSION INPUT SHAFT SPEED SENSOR (ISS) TRANSMISSION INTERNAL MODE SWITCH (IMS) TRANSMISSION MANUAL SHIFT SWITCH TRANSMISSION OUTPUT SHAFT SPEED SENSOR (OSS) TRANSMISSION SHIFT LEVER TRNS TRNS GND RANGE RANGE SIG C SIG P TRNS TRNS RANGE RANGE SIG B SIG A VALVE ASSEMBLY VIO/BLK WIRE VIO/YEL WIRE WHT WIRE WHT/GRY WIRE YEL WIRE YEL/BLK WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 GND HI SPD GMLAN SER DATA (+) AUTOMATIC TRANSMISSION ASSEMBLY BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM CONTROL SOLENOID DK BLU WIRE DRIVER INFORMATION CENTER (DIC) ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT) FUSE GMLAN SERIAL DATA BUS + GRN WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/VIO WIRE HDLP SW HDLPS OFF SIG CTRL PPL HI SPD GMLAN SER DATA (-) IGN VOLT HI SPD GMLAN SER DATA (-) WAKEUP SER DATA HI SPD GMLAN SER DATA - HOT AT ALL TIMES HOT AT ALL TIMES UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) HOT W/ IGNITION MAIN RELAY ENERGIZED IGN INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) ISS ISS LOW HIGH LOGIC GMLAN LOW REF OSS OSS HIGH LOW P/N PARK/ NEUTRAL SIG GMLAN SERIAL DATA BUS- PC 1 SOLENOID PC 2 SOLENOID PC 3 SOLENOID PC 4 SOLENOID PC 5 SOLENOID POWER DISTRIBUTION SYSTEM PPL PRESSURE CONTROL (PC) SOLENOID VALVE 1 PRESSURE CONTROL (PC) SOLENOID VALVE 2 PRESSURE CONTROL (PC) SOLENOID VALVE 3 PRESSURE CONTROL (PC) SOLENOID VALVE 4 PRESSURE CONTROL (PC) SOLENOID VALVE 5 RAP RELAY COIL CTRL RAP RLY COIL CTRL RED WIRE RED/DK GRN WIRE RED/WHT WIRE SHIFT SOLENOID (SS) VALVE 1 SHIFT SOLENOID (SS) VALVE 2 SS 1 SS 2 TAP UP/TAP DOWN SWITCH TCC SOLENOID TFP 1 TFP 3 TFP 4 TFP 5 TFT TORQUE CONVERTER CLUTCH PRESSURE CONTROL SOLENOID VALVE TRANS ENABLE SWITCH TRANSMISSION CONTROL MODULE (TCM) TRANSMISSION FLUID PRESSURE MANUAL VALVE POSITION SWITCH TRANSMISSION FLUID TEMPERATURE SENSOR TRANSMISSION INPUT SHAFT SPEED SENSOR (ISS) TRANSMISSION INTERNAL MODE SWITCH (IMS) TRANSMISSION MANUAL SHIFT SWITCH TRANSMISSION OUTPUT SHAFT SPEED SENSOR (OSS) TRANSMISSION SHIFT LEVER TRNS RANGE SIG A TRNS TRNS TRNS GND RANGE RANGE RANGE SIG C SIG B SIG P VALVE ASSEMBLY VIO/BLK WIRE VIO/YEL WIRE WHT WIRE WHT/GRY WIRE 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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 FORWARD SW SIG 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 NTC LOW REF 1 2 3 4 5 6 7 8 POSITIVE VOLT 2424 5978 SEATS SYSTEM BLK WIRE BLK/BLU WIRE BLK/RED WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN/BLK WIRE COMPUTER DATA LINES SYSTEM 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 MEMORY SWITCH DRIVER SEAT REAR VERTICAL MOTOR (UNDER RIGHT REAR CORNER OF DRIVER SEAT) DRIVER SEAT RECLINE MOTOR (LOWER RIGHT SIDE OF DRIVER SEAT BACK) ELEMENT SPLY VOLT ELEMENT SPLY VOLT NTC LOW REF FORWARD SW SIG REARWARD SW SIG FRONT VERTICAL DOWN REAR VERTICAL UP FRONT VERTICAL UP GRN WIRE GRN/BLK WIRE GRN/GRY WIRE GRN/PPL WIRE GRN/YEL WIRE GROUND GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/RED WIRE HORIZONTAL FORWARD HORIZONTAL REARWARD HOT AT ALL TIMES UNDERHOOD FUSE BLOCK (LEFT SIDE FUSE OF BATTERY) LO GMLAN SER DATA LOW REF LOW REF LOW REF LT GRN WIRE MEM MOTOR CTRL NETWORK BUS 8 DOWN SW SIG HIGH REF (2) NTC SIG ORG/ WIRE ORG/GRY WIRE PNK NTC SIG WIRE POSITION SENS SIG POSITION SENS SIG POSITION SENS SIG POSITION SENS SIG POSITIVE VOLT GROUND UP CTRL DOWN CTRL REAR VERTICAL DOWN RECLINE FORWARD REARWARD SW SIG RECLINE REARWARD RED WIRE RED/GRN WIRE RED/LT GRN WIRE RED/WHT WIRE RED/YEL WIRE SEAT MEMORY CONTROL MODULE (UNDER DRIVER'S SEAT) SEATS SYSTEM SEATS SYSTEM COMPUTER DATA LINES SYSTEM SW SET SIG SW SIG 1 WHT/ORG WIRE WHT/PPL WIRE WHT/RED WIRE YEL WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/RED WIRE YEL/WHT 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