Buick LaCrosse I (2004-2009) (below left side of dash, left of steering column) body control module (bcm) Wiring diagrams

39 23 46 29 SWITCH SIG P SWITCH SIG C SWITCH SIG B SWITCH SIG A A/T SHIFT LOCK CONTROL SOLENOID (IN CENTER CONSOLE) AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE CLASS 2 SERIAL DATA COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (TOP OF ENGINE) GRY WIRE GRY/WHT WIRE HAZRD FUSE HI SPD GMLAN SERIAL DATA HOT AT ALL TIMES I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) LT BLU WIRE LT GRN WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PARK/NEUTRAL SIGNAL RED/BLK WIRE SUPPLY VOLTAGE TRANSMISSION CONTROL MODULE TRANSMISSION INTERNAL MODE SWITCH (IMS) P/N WHT WIRE YEL WIRE YEL/BLK WIRE

10 VOLT REF A/T SHIFT LOCK CONTROL SOLENOID (IN CENTER CONSOLE) A/T SHIFT LOCK CONTROL SOLENOID (IN CENTER CONSOLE) (IN CENTER CONSOLE) AUTOMATIC TRANSMISSION BATTERY POSITIVE VOLTAGE BLK WIRE BLK/WHT WIRE CLASS 2 SERIAL DATA COLUMN SHIFT COLUMN SHIFT CONSOLE SHIFT COMPUTER DATA LINES SYSTEM CONSOLE SHIFT DK GRN WIRE DK GRN/WHT WIRE GRY WIRE GRY/WHT WIRE HAZRD FUSE HOT AT ALL TIMES I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) LOW REF LT GRN WIRE NCA WIRE ORG/ WIRE RED/BLK WIRE STOP LAMP SW SIG SUPPLY VOLTAGE SWITCH SIG A SWITCH SIG B SWITCH SIG C SWITCH SIG P TRANSMISSION INTERNAL MODE SWITCH (IMS) P/N WHT WIRE YEL WIRE YEL/BLK WIRE

BLK WIRE BLK/WHT WIRE COUR- TESY LAMP DEFEAT LAMP SWITCH ASSEMBLY DK BLU/WHT WIRE DOME DRIVER DOOR LOCK (IN REAR SIDE OF DRIVER'S DOOR) FRONT PASSENGER DOOR LOCK (IN REAR SIDE OF FRONT PASSENGER'S DOOR) GARAGE DOOR OPENER GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES I/P COMPARTMENT LAMP SWITCH I/P FUSE BLOCK INSIDE REARVIEW MIRROR INT/ILLUM FUSE LEFT COURTESY/ READING LAMP LEFT DOME/ READING LAMP LEFT I/P COURTESY LAMP LEFT REAR DOOR LOCK (IN REAR SIDE OF LEFT REAR PASSENGER'S DOOR) LEFT VANITY MIRROR LAMP LT GRN WIRE OFF ORG/ WIRE OVERHEAD CONSOLE READING LAMPS PNK/BLK WIRE REAR COMPARTMENT COURTESY LAMP REAR COMPARTMENT LID LATCH (IN REAR COMPT LID) RIGHT COURTESY/ READING LAMP RIGHT DOME/ READING LAMP RIGHT I/P COURTESY LAMP RIGHT REAR DOOR LOCK (IN REAR SIDE OF RIGHT REAR PASSENGER'S DOOR) RIGHT VANITY MIRROR LAMP TAN WIRE W/ SUNSHADE MIRROR YEL/BLK WIRE