Automatic Headlamp System
When the exterior lamp control is set to AUTO and it is dark enough outside, the headlamps come on automatically.

There is a light sensor located on top of the instrument panel. Do not cover the sensor. Otherwise the headlamps will come on when they are not needed.
The system may also turn on the headlamps when driving through a parking garage or tunnel.
When it is bright enough outside, the headlamps will turn off or may change to daytime running lamps (DRL).
The automatic headlamp system turns off when the exterior lamp control is turned to
or the ignition is off.
See also:
When to Check
Check the tires once a month or more. Do not forget the compact spare tire, if
the vehicle has one. The cold compact spare should be at 420 kPa (60 psi). For additional
information regarding the c ...
Responsive performance
Buick LaCrosse's stiff body structure serves as the foundation for precise
suspension tuning, safety and a quiet ride. Buyers can choose from a family of
efficient, direct-injection six-cylinder e ...
Engine Identification
The eighth character in the VIN is the engine code. This
code identifies the vehicle’s engine, specifications,
and replacement parts. See “Engine Specifications”
under Capacities and Speci ...
