Where is the fuel relay switch located on a 97 Chevy Astro Van?

The fuel pump relay location in a 1997 Chevy Astro van is in the underhood fuse block/relay center. It's not always clearly labeled, so you'll likely need to consult your owner's manual or a wiring diagram to pinpoint the exact location within that fuse box. The manual will show a diagram of the fuse box with the relay locations and corresponding numbers. The relay itself might be labeled, or you might need to cross-reference its number to identify it.