I have a 2004 Monte LS 3.4 engine. All of a sudden my driver side climate control only blows cold air. I think the lever is stuck on cold even if I put it on hot. The passenger side works fine. Actually thats the side that heats the car. Is there any way I can fix this myself? If so where do I start?

 

I moved both of your threads, the how-to section is just for detailed explanations on HOW TO DO something.

Your actuator on the driver's side is probably broken and not allowing it to work. You'll have to remove the dash to get to it, but it's not a difficult swap.