Mechanics

CHEVY SURBURBAN 2500 FUEL SYSTEM

2001 Chevrolet Truck

117000 miles
this vehicle has to fuel tanks, one above spare tire, and one in the usual sub. Area. I changed the main fuel pump in top tank to remedy a pump whine and gauge inacuracy, but now has a whine from lower tank only when running for a period of time. Does the lower tank house a seperate fuel pump for fuel delivery or system pressure, and how much noise is normal?
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Coyotecustom
June 2, 2006.



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