I have an 04 tahoe and the air is giving me some trouble. If I have the fan speed on 1, 2, 3, or 4, I get not air unless I am driving fairly fast. When I put it on 5, it blows full blast. I asked the service tech at the dealer, and he said that it could really only be one thing, the blower resistor. He said it would be around 150 to install a new one. My question is: would this be a really easy install if I got the part myself, or should I leave it to them??

Thanks for any help!!

Brandon