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Where is the fuel pump relay located on a 1995 Chevy astro van 4.3 liter?

The fuel pump relay location on a 1995 Chevy Astro van with a 4.3L engine is in the underhood fuse block, also known as the Power Distribution Center (PDC). It's not typically located in the passenger compartment fuse box.

However, precise pin location within that underhood fuse block varies slightly depending on options and specific build. Your best bet is to:

1. Consult your owner's manual: This is the most reliable source. It will have a diagram of the fuse block showing the relay locations.

2. Look for a diagram on the fuse block cover itself: Many fuse blocks have a diagram printed on the inside of the cover.

3. Use a wiring diagram: A wiring diagram specific to your year, make, model, and engine will pinpoint the relay. You can find these online (often for a fee) through sites specializing in automotive repair information, such as AllDataDIY or Mitchell 1.

4. Use a multimeter: If you're comfortable with basic electrical work, you can use a multimeter to trace the fuel pump circuit and identify the relay based on its activation when the ignition is turned on. Caution: This requires knowledge of basic electrical safety and automotive wiring.

Without a specific diagram referencing your vehicle's build, I can't give a precise location within the underhood fuse block. Always refer to the vehicle's documentation first.