Why does the daytime headlights flicker on your 2002 GMC Savana?

The flickering daytime headlights on a 2002 GMC Savana could be caused by several issues, including a faulty headlight relay, a weak battery, or corroded wiring connections. Additionally, a malfunctioning alternator or loose connections can lead to inconsistent power supply, resulting in flickering. It's advisable to inspect the electrical system and components to identify and resolve the underlying issue.