* Under the hood in the fuse/relay box: This is the most common location. The fuse box is typically located near the battery, often under a cover. Check the diagram inside the cover. The relay itself might be labeled, or you might need to consult a wiring diagram to identify it.
* Under the dashboard: Less common, but possible, especially if the vehicle has an extensive array of electrical accessories.
To find it definitively:
1. Consult your owner's manual: This is your best first resource. It should have a diagram showing the location of all fuses and relays.
2. Use a wiring diagram: A wiring diagram specific to your year and model Savana 1500 will show the fuel pump relay's location and circuit path. You can usually find these online through sites specializing in automotive repair information (often requiring a subscription).
3. Check online forums: Search online forums specifically for GMC Savana 1500 owners. Someone might have already posted about their fuel pump relay location and possibly even pictures.
Important Note: Before working on any electrical components, disconnect the negative terminal of your battery to prevent accidental shorts and electrical shocks. If you are not comfortable working with automotive electrical systems, take your vehicle to a qualified mechanic.