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Q: coolant in oil on 1999 Chevrolet Silverado 1500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
can this be caused by an intake leak.
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If it is a 5.3 liter it can also be caused by a cracked head. From 99-06 in the 5.3 liter engines GM outsourced the heads to a company called Castech. These engines had a casting flaw which was known for cracks and or blown head gasket.
Yes, a leaking intake manifold gasket can cause coolant to leak in to the crankcase and mix with the oil on the 5.0L and 5.7L V8 engines.
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