Ther isd a fuel pump fuseand fuel pump relay. also and I am not sure where it is located, but all vehicles with electric fuel pumps have a switch that is suposed to cut off the fuel pump if the vehicle get into an accident. this switch on many cars is located on the pasanger side inside car in the kick panel or around the heater box. not sure of location on the astro van. these switches sometimes pop off for no reason or hitting some rough roads etc. Gm also has several service bulitens out for defective harnesses and the problem might be the connector to the fuel pump. some ideas. good luck
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