Fuel Filter

Changing the fuel filter of my 89 astro van and dont know how to depressurize. How do i do this?

On the box of the new filter it says to depressureize the fuel before i change anything. How do i do that?

i own a shop and all you have to do is take the gas cap off of it ,and you,ll hear it release the pressure on it,it will still have a small amount in it when you remove the filter but it will only shoot out a very small spurt of fuel ,just don't be laying directly under it when you loosen the filter up on it,some gas will run out,because of whats in the line,but don't worry it will stop,and then change the filter and that's it,be sure and tighten the gas cap back up on it,and that's about it,your done with it,good luck,i hope this helps.

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