Electrical problem
1999 Chevy Suburban V8 Two Wheel Drive Automatic 175000 miles
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I have changed my fuel pump two times in the the last two mounth.When I drive about 3o miles now the car just starts acking like its running out of gas,Than it just shuts off.Now if you let it cool down it strat back up.I have also checked the fuel,I take the gas line off and the fuel pump is on for about 2 sec than shuts off,Plz help ,thanks Doug

Check for voltage drop to the fuel pump/fuel pressure and the fuel pump and oil pressure sending unit.