No, there isn't a "fuel pump relay button" on a 1997 Chevy Venture (or any other car, for that matter). The fuel pump is controlled by a relay, but it's not activated by a button that you push. The relay is activated by the PCM (Powertrain Control Module) based on various factors like the ignition switch position and other sensor inputs.
To find the fuel pump relay itself, you'll need to consult your owner's manual or a repair manual specific to your 1997 Chevy Venture. The location varies slightly by year and trim, but it's typically in the underhood fuse box or in a separate relay center. The relay itself will be labeled or you can find a diagram in your manual.
