Where is the fuel relay module located on a 1999 Chevy Express van?

The fuel pump relay location on a 1999 Chevy Express van varies slightly depending on the engine and specific options. It's not typically called a "fuel relay module," but rather just a relay. You're most likely to find it in one of these locations:

* Under the hood in the underhood fuse box: This is the most common location. The fuse box is usually located near the battery. The relay itself might be labeled, or you may need to consult your owner's manual or a wiring diagram to identify it. Look for a relay that's associated with the fuel pump or fuel injection.

* Inside the passenger compartment fuse box: Less common, but possible. Again, check your owner's manual or a wiring diagram.

To find it definitively:

1. Consult your owner's manual: This is the best place to start. It should have a diagram showing the location of all fuses and relays.

2. Use a wiring diagram: A wiring diagram specific to your 1999 Chevy Express van (with the correct engine) will show you exactly where the fuel pump relay is located and what it looks like. You can often find these online through automotive repair websites.

3. Check online forums: Search online forums dedicated to Chevy Express vans. Other owners may have posted about finding their fuel pump relay.

Important Note: Before working on any electrical components, always disconnect the negative battery terminal to prevent electrical shock or damage.