Circuit/System Verification
WARNING: This page is about a different car, the 2006 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.
Ignition ON, activate each inadvertent power courtesy lamp. Ignition OFF. Activate each inadvertent power courtesy lamp. Lamps should remain illuminated for more the 20 minutes with the ignition switch in the OFF position, the BCM will deactivate the inadvertent power courtesy lamps circuit to prevent total battery discharge.