I posted this in 1st gen tech, but I think it's probably better suited here. The other day I was driving along and my blazer started smoking out the exhaust, it got so bad that I could barely see out of the truck. It was white smoke, i did some research and checked my plugs, check engine codes, and my oil. The plugs looked fine, a little black and smelled like gas but that's it. The oil looked great, and the only code i get is an o2 sensor. I think it may be the intake manifold gasket but supposedly this motor only has about 3000 miles on it. Also I thought if i was getting anti freeze in the chamber it would make my plugs really white cause its steams cleans them. Any help is greatly appreciated.

 

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