Can a headlight on a 2002 Chevy Cavalier make the service light come on?

Yes, a headlight issue on a 2002 Chevy Cavalier can potentially trigger the service light. If the headlight is malfunctioning due to a blown bulb or electrical issue, it may cause the vehicle's onboard diagnostics system to detect a fault, resulting in the service light illuminating. However, the service light can also indicate other issues, so it's important to perform a thorough diagnostic to identify the exact cause.