Here is an update and question. Well I figured out the cause of the heating issue thanks to your guy's help. Well it blowing back the heater core fixed the heat issue but more problems occured over the next few days. I noticed that the coolant wasnt staying full in the radiator so I crawled under the vehicle to find that it was leaking from above the crank pully area. Being that I couldnt see exactly from where I figrued that I would change the water pump just to be safe. I went and pulled the dealer recipts to see that it had an intake gasket replacement just before I bought it. I replaced the water pump which by the way was really easy, GM really made it easy to get at.
Now it doesnt leak coolant but here is my question when I accelerate I hear a rushing noise sorta like a turning the water on in your sink coming from the heater core what could this be? It happens every time I accelerate.
Also I had my check engine lite on so I had a friend figure out what the code was and its P0410 which from what I can find tells me that the air pump has water in it. Where is the air pump? Is it that pump below the radiator? Is it something that I need to be conserned about? The vehicle has 100,000 + miles on it. Is it expensive to repair?
Thanks in advance for your help.