AC/Heater Blower on 2003 GMC Safari

My blower fan for the AC/Heater will work, and then it cuts out for a day or two, and then comes back on again. This has happened 3-4 times in the last couple weeks. Any idea's of what may cause this? I just had a new blower put in last March. Thank you!

Asked by for the 2003 GMC Safari
It could possibly be the blower motor resistor, which mounts to the front of the blower housing with 2 screws and 2 connectors and is an easy replaceable part.