Question about 1993 GMC Sierra
White smoke on startup could be a head gasket leak between the water jacket and the cylinder. Won't always show in the oil. Antifreeze makes it smell oily or sweet. Compression test will tell for sure. Bluish is oil that was burned. White is usually water or oil into exhaust after combustion.
Posted on Feb 06, 2010
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Posted on Jan 02, 2017
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