Circuit/System Description
WARNING: This page is about a different car, the 2011 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
The hazard flashers may be activated in any power mode. The hazard warning switch is permanently grounded. When the hazard warning switch is placed in the ON position, ground is applied through the hazard warning switch signal circuit to the body control module (BCM). The BCM supplies battery voltage to all turn signal lamps in an ON and OFF duty cycle.