why does the blower motor on my 2007 chevy impala not work does not blow at all

First thing to check is the resistor block that's near the blower motor, under the passenger's side of the dash. It will have a bunch of wires plugged into it. When you unplug the wiring connector it will most likely be burned out. Replacing the resistor block and pigtail that plugs into the resistor block will most likely fix it. GMs from that time period tended to have that problem. Hope that helps! Jim