replace fuel pump on 1997 Buick LeSabre

I replace the fuel pump but still a hissing noise in the rear by the fuel tank.but it not a air leak because the mechanic said that no make the sound when it been running for a length of time causing the car to shut off.

by in Tampa, FL on April 12, 2009
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1 answer
ANSWER by , April 12, 2009
You may have air suspension and it may have a leak, which is causing the hissing.