[CastIron]

if it failed on just one or two speeds, it probably needs a resistor and a motor. Check for voltage at the blower motor connector with the fan turned on. If it has power and ground, it probably just needs a motor.
The motor isn't terribly difficult to replace. It's easiest to just lower the fender liner so you can pull the blower cage out of the box without have to remove the ecm and coolant reservoir. It may have a cover you have to cut to get to the blower though.