Buick  Lacrosse 2011-
 PART   COLOR  LOCATION
 12 VOLT CONSTANT   RED/PURPLE (+) (30AMP)   @ BCM, LT.BLUE 27-PIN PLUG, PIN 4, SEE NOTE #2
 STARTER  SEE NOTE #1  
 STARTER 2  N/A  
 IGNITION 1  PURPLE (+)(without Push Button Start) or PURPLE/BLACK (+)(with Push-Button Start)  @ IGNITION SWITCH HARNESS or BCM, LT. GREEN 25-PIN PLUG, PIN 6, SEE NOTE #2
 IGNITION 2  N/A  
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  PURPLE(+) (without Push Button Start) or PURPLE/YELLOW(+)(with Push-Button Start)  @ IGNITION SWITCH HARNESS or BCM, LT. GREEN 25-PIN PLUG, PIN 5, SEE NOTE #2
 ACCESSORY/HEATER BLOWER 2  N/A  
 KEYSENSE  N/A  
 PARKING LIGHTS ( - )  LT. GREEN (-)  @ BCM, WHITE 26-PIN PLUG, PIN 22, SEE NOTE #2
 PARKING LIGHTS ( + )  N/A  
 POWER LOCK  BROWN (TYPE B)  @ BCM, LT. BLUE 27-PIN PLUG, PIN 19, SEE NOTE #2
 POWER UNLOCK  BROWN (TYPE B)  @ BCM, LT. BLUE 27-PIN PLUG, PIN 15, SEE NOTE #2
 DOOR TRIGGER  GRAY (-)  @ DRIVER WINDOW MOTOR, BLACK, 7-PIN PLUG, PIN 6
 DOMELIGHT SUPERVISION  GRAY (-)  @ BCM, GRAY 26-PIN PLUG, PIN 1, SEE NOTE #2
 TRUNK RELEASE  YELLOW (-)  @ BCM, PINK 27-PIN PLUG, PIN 15, SEE NOTE #2
 SLIDING POWER DOOR  N/A  
 HORN  BROWN/WHITE (-)  @ BCM, BROWN 26-PIN PLUG, PIN 19, SEE NOTE #2
 TACH  BROWN, DK. BLUE, LT. GREEN, GRAY/DK. BLUE, or TAN (AC)  @ ANY FUEL-INJECTOR, BLACK 2-PIN PLUG, PIN 1
 WAIT TO START LIGHT  N/A  
 BRAKE  PURPLE or PINK (+)  @ BCM, BLACK 26-PIN PLUG, PIN 11, SEE NOTE #2
 FACTORY ALARM DISARM   DISARMS with FACTORY REMOTE ONLY!!  
 ANTI-THEFT  GM'S MULTIPLEX IGNITION/TRANSPONDER SYSTEM, See NOTE #1  
 EXTRA INFORMATION
 NOTE #1: This vehicle requires a Special INTERFACE BYPASS MODULE for REMOTE STARTING, you can use either the Part # DB-ALL OR the part #XK09 to order please go to the INTERFACE BYPASS MODULE Page on this website. NOTE #2: The BCM is located under the Drivers side of the Dash