Jvards

My 05 LGT runs and shifts great but for some reason the coolant reservoir is always empty but my car doesn’t ever overheat. I can’t figure out what’s goin on. Also, when I park the car after driving for a while I notice a very light small amount of white smoke coming out of the hood that sometimes smells like antifreeze. Has anyone else had this problem or know what step I should take? This is my first owned legacy so I’m not as informed as I’d like to be.... thanks guys