Hey, guys. A few days ago my wife noticed her low coolant warning light on so she stopped and had the car towed home so I could take a look at it. There were no other warning lights and I have no reason to believe it's ever been overheated. This morning I took off the plastic pan under the engine, topped off (it took about 1/4 gallon) and bled the system. Wiped everything down and looked for leaks with the engine running for awhile. I was expecting to see something coming from the expansion tank because when the cooling system was overhauled a couple years ago that was the only part my shop overlooked (hence a portion of my recent motivation to start doing as much of my maintenance as I feel comfortable with). I didn't find any leaks. The car didn't overheat or anything but it wasn't blowing hot air with the heat all the way up (though I'll admit that my brief time spent with the car due to traveling and living in SD I don't know all the nuances of the AC/heating). I think I've hit all the details but I may be forgetting something. I've done my homework and think I've covered my bases but I'm still nervous that I don't know where that coolant went. Would it be beneficial for me to invest in a pressure test kit to make sure it's holding pressure or is observing for leaks for awhile sufficient? Anyone have any insight?