To find it, you'll need to do some detective work:
1. Consult your owner's manual: This is your first and best resource. The manual should have a diagram of the fuse and relay panels, clearly identifying each component.
2. Check the underhood fuse box: This box is usually located near the battery. Look for a diagram on the inside of the fuse box lid. The diagram should show the relay locations. Often, the fuel pump relay is labeled or is near relays for other engine components.
3. Check the interior fuse panel (under the dash): This is your second likely location. Again, look for a diagram on the inside of the fuse panel cover. Many times the fuel pump relay is not labelled specifically, but you'll find it near other relays that control similar engine functions (like the ignition, fuel injection, etc.).
4. Use a multimeter (optional but helpful): If you can't visually locate it, you can use a multimeter to test the circuits leading to suspected fuel pump relays. However, this requires some electrical knowledge and caution. Always disconnect the negative battery cable before working with any electrical components.
5. Online forums and resources: Search online forums dedicated to Chevy G20 vans or 1993 GM vehicles. Someone may have posted a picture or description of the location in their specific vehicle.
Important Note: While the relay location *might* be standardized for that year and model, variations exist. Even within the same model year, there could be different fuse box/relay setups depending on options or regional variations. Your best bet is to use a combination of the above methods to find it.
