Blower wont work on lower speeds?

This has happened to me as well. Settings 1-2 don't work for me. 1999 pontiac grand am se 97,000 miles

how much should it cost to replace this?

One repair shop was going to charge me over $300 for parts and labor. Completely ridiculous

How easy is it to replace for someone with not much knowledge of cars?

I heard it was under the dash, near the center, for a grand am.
Do you need to solder it in?