To find it precisely:
1. Consult your owner's manual: This is your best resource, as it should have a diagram showing the location of fuses, relays, and modules.
2. Search online for a 2000 Chevy Astro BCM location diagram: Many automotive forums and repair sites have diagrams and photos from other owners who've accessed the BCM.
3. Use a wiring diagram: A wiring diagram for your specific Astro model will show the BCM's location and connected wires.
Remember to disconnect the negative battery terminal before attempting to access the BCM to avoid electrical shocks or damage.