I have a coolant leak behind the "harmonic balancer", a fast drip, where could this leak be coming from?
It's probably your water pump dripping down behind the harmonic balancer. Many GM water pumps have a hole in the top of them. When they start to go bad, they start to leak out of that hole. I guess it's GM's way of "letting you know" there is a problem. If your water pump would just seize, and no indication was there, so you knew, you could burn you engine up in 10 minutes of driving.
The water pump is directly above it
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