Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
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One thing to do here that really helps pinpoint the leak is to rent a coolant pressure tester from a local parts store.Then you can pressurize the system to then check over the coolant hoses and components for anything leaking.Once this is done and the leak is located it can be repaired.
One common cause I have seen is the heater core can leak and leak out of the ac drain.Usually if this is the cause here you would smell the coolant inside the vehicle with the heater or ac running.
I have also seen the heater core hoses leak around the clamps intermittently.
I would have the coolant system pressure tested for any leaks and any leaks found would need repaired to correct this fault here.This is the best way.If no leaks show up purchase some coolant tracer dye.You add this little bottle of dye to the coolant system and it can be obtained from a parts store.Then the vehicle is ran until it leaks then use a black light to look around the engine bay area for the due leaking.It will usually be a neon orange or yellow that shows up and will show a trail where the coolant leak is coming from.
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