u/Ok-Trouble1183

My family owns this old Silverado that we use for errands and stuff, appereantly the motor was rebuilt not long ago too.

Anyways, we have to buy coolant every month, and fill it up using half a container every two weeks, this kinda gets annoying.

We dont see any leaks under the truck, my dad checked the pil and it isn't getting milky or mixing with coolant, so, where can the coolant be going? Its not leaking, its not going to the oil, so does it just evaporate that fast?