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Message: <blockquote data-quote="ORVietVet" data-source="post: 28483" data-attributes="member: 9438">"Obviously, the 1st guess is the fuel pump, which for all I know may be GM OE from the '02 assembly line?I'm asking for any other guesses, BESIDES the fuel pump itself.What could make the fuel pump take an unapproved/unauthorised break, when I want it to keep on working?"Get a fuel pressure gauge and snake out under back of hood and attach to w/s and read the pressures while driving. Have you changed the fuel filter? If do a pump, do the filter.</blockquote>