Question about 1996 GMC Yukon

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Truck puffs out white smoke when its first cranked up and goes away and runs fine

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Sounds like simple condensation in your exhaust. Doesn't sound like and issue.

Posted on Jan 02, 2011

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Valve seals are leaking. If it does not use any oil I wouldn't worry about it.

Posted on Jan 02, 2011

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