The 1999 Chevrolet Malibu is part of the fifth generation (1997-2003) manufactured by General Motors. This is the first smaller, front-wheel-drive Malibu that General Motors put back on the market after the Malibu line was temporarily discontinued in the early 1980's.

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What is the sensor that is spewing oil above the thermastat housing

Its above what i believe is the thermastat housing even thou they say the thermastat is connected to the water pump near the fire was . Also would the connector have a o ring or not.

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What year? What engine? Post an image of where the oil is coming out off with your question.

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If this is a 3.1L its probably the oil pressure sender unit They have a tendency to leak . They require a special socket to replace. As long as you have the right socket its an easy fix

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