Buick LaCrosse II facelift (2013-2016) hot w/ ignition main relay energized Wiring diagrams

1 2 3 4 5 6 7 8 9 10 11 12 13 14 B+ GND AUTOMATIC TRANSMISSION ASSEMBLY BCM 1 FUSE BLK WIRE BLK/WHT WIRE BLU WIRE BODY CONTROL MODULE (BCM) (LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM CONTROL SOLENOID DRIVER INFORMATION CENTER (DIC) ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT) FUSE GMLAN SERIAL DATA BUS + GND OSS OSS RANGE HIGH LOW SIG P GRN WIRE GRY WIRE GRY/VIO WIRE HDLP SW HDLPS OFF SIG CTRL 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 HIGH LOW LOGIC GMLAN LOW REF 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 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/LT GRN WIRE RED/WHT WIRE SHIFT SOLENOID (SS) VALVE 1 SHIFT SOLENOID (SS) VALVE 2 SS 1 SS 2 TCC SOLENOID TCM BATT FUSE TCM FSC IGN TFP 1 TFP 3 TFP 4 TFP 5 TFT TORQUE CONVERTER CLUTCH PRESSURE CONTROL SOLENOID VALVE TRANSMISSION CONTROL MODULE (TCM) TRANSMISSION FLUID PRESSURE 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 RANGE RANGE SIG B SIG A TRNS TRNS RANGE SIG C VALVE ASSEMBLY VIO WIRE 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 BCM 1 FUSE 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) GMLAN SERIAL DATA BUS + GRN WIRE GRY WIRE GRY/VIO WIRE HDLP SW HDLPS OFF SIG CTRL 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 TCM BATT (LEFT SIDE FUSE OF BATTERY) HOT W/ IGNITION MAIN RELAY ENERGIZED IGN INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) ISS ISS HIGH LOW 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 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 TCC SOLENOID TFP 1 TFP 3 TFP 4 TFP 5 TFT TORQUE CONVERTER CLUTCH PRESSURE CONTROL SOLENOID VALVE TRANSMISSION CONTROL MODULE (TCM) TRANSMISSION FLUID PRESSURE 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 TRN FSC IGN FUSE TRNS RANGE SIG A TRNS TRNS TRNS GND RANGE RANGE RANGE SIG C SIG B SIG P VALVE ASSEMBLY VIO WIRE VIO/BLK WIRE VIO/YEL WIRE WHT WIRE WHT/GRY WIRE YEL WIRE

BLK WIRE BRN WIRE BRN/BLU WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DRIVER BACK SEAT HEATING ELEMENT (DRIVER'S SEAT BACK) DRIVER CUSHION SEAT BLOWER MOTOR (UNDER CENTER OF DRIVER CUSHION) DRIVER CUSHION SEAT HEATING ELEMENT (DRIVER'S SEAT CUSHION) DRV SEAT VENT MTR CTRL PASS SEAT VENT MTR CTRL FRONT SEAT HEATING CONTROL MODULE (BELOW FRONT CENTER OF DRIVER SEAT) GRN/BLU WIRE GRN/VIO WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED HTD ST CO DR FUSE HTD ST DR FUSE IGN 1 VOLT LIN BUS 2 LOGIC MOTOR CTRL PASSENGER BACK SEAT HEATING ELEMENT (FRONT PASSENGER'S SEAT BACK) PASSENGER CUSHION SEAT BLOWER MOTOR (UNDER FRONT PASSENGER SEAT CUSHION) PASSENGER CUSHION SEAT HEATING ELEMENT (FRONT PASSENGER'S SEAT CUSHION) RED WIRE RED/GRY WIRE RED/YEL WIRE SEAT MASS FUSE UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/BLK WIRE VIO/WHT WIRE W/O ADAPTIVE CRUISE CONTROL W/ ADAPTIVE CRUISE CONTROL WHT WIRE WHT/BRN WIRE

BLK WIRE BRN/WHT WIRE GROUND HEATED STEERING WHEEL IND HEATED STEERING WHEEL SWITCH HOT W/ IGNITION MAIN RELAY ENERGIZED HTD WHEEL FUSE IGN LEFT STEERING WHEEL CONTROLS SWITCH RED WIRE RIGHT STEERING WHEEL CONTROLS SWITCH 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 UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/BLU WIRE VIO/BRN WIRE VOLT REF WHT/YEL WIRE YEL/BLU WIRE YEL/GRY WIRE YEL/RED WIRE

BLK WIRE BLK/WHT WIRE EXPRESS SIG GND IGN 1 VOLT SPLY VOLT HOT W/ IGNITION MAIN RELAY ENERGIZED LEFT TAILLAMP ASSEMBLY LT GRN WIRE REAR WINDOW SUNSHADE MODULE (LEFT SIDE OF REAR WINDOW SHELF) REAR WINDOW SUNSHADE MOTOR (LEFT SIDE OF REAR WINDOW SHELF) REAR WINDOW SUNSHADE SWITCH RED WIRE SEAT MASS FUSE UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/BLK WIRE VIO/GRY WIRE W/ HEATED SEATS YEL WIRE

AIR BAG FUSE AIR BAG IND AIR BAG OFF IND AIR BAG ON IND SEAT BELT ON IND BLK WIRE BLK/ORG WIRE BLU/YEL WIRE BRN WIRE BRN/ORG WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE FUSE GND SERIAL DATA GRN WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/BLU WIRE GRY/ORG WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (BELOW CENTER CONSOLE) INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) LEFT FRONT IMPACT SENSOR (LEFT SIDE OF CROSS MEMBER) LEFT TAILLAMP ASSEMBLY LO SPD GMLAN LOGIC LOW SPD GMLAN SERIAL DATA LOW SPEED GMLAN SERIAL DATA LT GRN WIRE NCA WIRE ORG/ WIRE ORG/GRN WIRE ORG/LT GRN WIRE ORG/VIO WIRE ORG/WHT WIRE ORG/YEL WIRE PASS AIR BAG ON IND PASS AIR BAG OFF IND PASSENGER AIR BAG DISABLED INDICATOR PASSENGER INSTRUMENT PANEL AIR BAG PASSENGER PRESENCE DETECTION MODULE (UNDER FRONT PASSENGER'S SEAT) PNK WIRE PPL RED WIRE RED/WHT WIRE RIGHT FRONT IMPACT SENSOR (RIGHT SIDE OF CROSS MEMBER) SEAT BELT IND SERIAL DATA (-) SERIAL DATA (+) SHORTING BAR STEERING WHEEL AIR BAG STEERING WHEEL AIR BAG COIL TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/GRY WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/ORG WIRE YEL WIRE YEL/ORG WIRE