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First I didn,t know they made a 4.2 vortec in 1955. This is obviously a spelling error. Second it sounds to me like a mechanical problem. My guess is that its not running to good. I could tell you more if I knew what year and make of car I don,t think it,s a 1955. Sorry need more detail info. I think you mean a 1995. I have seen many fuel pressure regulators go bad. Replace the CPI unit (injectors) under the upper manifold. they leak done and put gas in your oil, also i bet your vehicle is hard to start

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โˆ™ 2004-10-03 18:55:10
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Q: Why does gas get into the oil of a 1955 GMC 4.2 vortec?
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