* Airbag light is on: This indicates a fault within the airbag system. The light itself can't be "reset." The underlying problem causing the light needs to be diagnosed and fixed by a qualified mechanic. A simple switch won't resolve the issue. The diagnostic trouble code (DTC) stored in the system's computer needs to be read and interpreted to pinpoint the fault (e.g., faulty sensor, shorted wire, deployed airbag, etc.).
* You've accidentally triggered a diagnostic mode: Some diagnostic tools or procedures might temporarily activate a diagnostic mode, but this wouldn't involve a resettable switch.
In short, do not attempt to "reset" anything yourself. Improperly handling the airbag system can be dangerous. Take your 2001 Chevrolet Venture to a qualified mechanic or automotive technician to diagnose and repair the problem indicated by the airbag light (if it's on). They have the tools and expertise to safely diagnose and fix the underlying issue. Attempting a DIY repair could be hazardous and may void any warranties.
