Why do the headlights. Come on when any door is opened on my 2008 trailblazer

The Headlamps On at Exit and Perimeter Lighting modes can be adjusted using the steering wheel controls to select the wanted function as displayed in the driver information center. The Headlamps On at Exit selection will allow the driver to customize the period of time that the headlamps remain illuminated upon exiting the vehicle. This period can be adjusted from 0 seconds to 180 seconds. The Perimeter Lighting feature allows the driver to select if they want the headlamps and backup lamps to illuminate when the door UNLOCK button on the key fob is activated. This feature can be turned ON or OFF by using the driver information center steering wheel control buttons.
programming Features with the Driver Information Center (DIC)
To enter programming with the driver information center (DIC), perform the following actions:
Turn the ignition to RUN.
Place the vehicle in PARK.
Press the Personalization button on the steering wheel to enter personalization programming.
Automatic Door Locks
Continue with the following steps in order to personalize the automatic door locks:
Press the Select button in order to enter the menu. The first choice seen is the current setting.
Press the Select button in order to scroll through the following options:
• LOCK DOORS: IN GEAR
• LOCK DOORS: WITH SPEED
Press the Personalization button in order to advance to the next option.
Press the Select button in order to enter the menu. The first choice seen is the current setting.
Press the Select button in order to scroll through the following options:
• UNLOCK DRIVER: IN PARK
• UNLOCK DOORS: IN PARK
• UNLOCK DOORS: AT KEY OUT
• UNLOCK DOORS: MANUALLY
Press the Personalization button in order to advance to the next option.
Remote Activation Verification
Continue with the following steps in order to personalize the remote activation verification feature:
Press the Select button in order to enter the menu. The first choice seen is the current setting.
Press the Select button in order to scroll through the following options:
• LOCK FEEDBACK: BOTH
• LOCK FEEDBACK: OFF
• LOCK FEEDBACK: HORN
• LOCK FEEDBACK: LAMPS
Press the Personalization button in order to advance to the next option.
Press the Select button in order to enter the menu. The first choice seen is the current setting.
Press the Select button in order to scroll through the following options:
• UNLOCK FEEDBACK: BOTH
• UNLOCK FEEDBACK: OFF
• UNLOCK FEEDBACK: HORN
• UNLOCK FEEDBACK: LAMPS
Press the Personalization button in order to advance to the next option.
Delayed Lighting
Continue with the following steps in order to personalize the delayed lighting feature:
Press the Select button in order to enter the menu. The first choice seen is the current setting.
Press the Select button in order to scroll through the following options:
• HEADLAMP DELAY: 10 SEC
• HEADLAMP DELAY: 20 SEC
• HEADLAMP DELAY: 40 SEC
• HEADLAMP DELAY: 1 MIN
• HEADLAMP DELAY: 2 MIN
• HEADLAMP DELAY: 3 MIN
• HEADLAMP DELAY: OFF
Press the Personalization button in order to advance to the next option.
Perimeter Lighting
Continue with the following steps in order to personalize the perimeter lighting:
Press the Select button in order to enter the menu. The first choice seen is the current setting.
Press the Select button in order to scroll through the following options:
• PERIMETER LIGHTS: OFF
• PERIMETER LIGHTS: ON
Press the Personalization button in order to advance to the next option.