To find it, you need to:
1. Consult your owner's manual: This is the best place to start. The manual should have a diagram showing the location of all relays and fuses.
2. Check the underhood fuse box: This is the most common location. Look for a diagram on the inside of the fuse box cover. The diagram often identifies relays by function (like "Fuel Pump").
3. Look for a separate relay center: Some trucks have a second relay center, often located near the underhood fuse box but separate.
4. Use a wiring diagram: A wiring diagram for your specific year, model, and engine will show the location of the fuel pump relay and its circuit. You can find these diagrams online (often at sites specializing in automotive repair information, but be sure it's for your exact truck) or from a parts store.
5. Search online forums: Searching online forums dedicated to Chevy trucks (like the Chevrolet Silverado forum) may yield results from other owners who've located the relay in their similar trucks. Be sure to specify the engine size in your search.
Without knowing the exact engine and options of your specific truck, pinpointing the exact location is impossible. The above steps are the most reliable way to find it. Remember to always disconnect the negative battery terminal before working on electrical components.
