Coolant system I have a 1990 Chevy Lumina 6cyl. During the last two winters I've noticed that I will leak coolant in the front and towards the passenger side. I cant find where the leak is coming from or why it only happens in the winter?

SOURCE: Ford Freestyle Driver door will not close/lock in cold weather

There is a recall on this exact problem. I would contact your Ford Dealer. I recently was advised of the recall when I called Ford.

SOURCE: A/C and Heat Driver Side Intermittent Problem

You will need to replace your driver side temp actuator. It is most likely sticking or over travelling. It is located under the dash directly below the a/c control head. It is bolted to the a/c box upside down with two small bolts. Let me know if i can help more.

SOURCE: 2000 Saturn ls2 Coolant leaking into car on passenger side

Your heater core is in need of replacement.

SOURCE: antifreeze/coolant leaking from under passenger side dash

If it's your heater core, unless you're a mechanic you probably should get professional help. The heater core is located on the firewall and many parts need to be replaced to get to it. Do you see water on the floor inside the vehicle, Many times a heater core will leak inside.

SOURCE: coolant leak

coolant leak may be coming from intake manifold gaskets,4.3 is notorius for leaking coolant from behind the mainfold in those years