[jimdichiara]

I have had the low coolant light appear and the car has overheated slightly on my 2003 Chevy Malibu. Refilled car, had system pressure tested, held pressure and couldn't find any leaks. It has been working fine for a week, but don't understand what happened, where I lost the fluid, or why. I hear some Malibus have an intake manifold gasket leak or something similar to that. Can anyone let me know what they think? Thanks.