The only reason napa lists a "few" different ones is that they are made by different after market manufactures, and some include the fan and some don't, other than that they are all identical. Except for the A/C trucks, all non A/C trucks use the same blower motor. Some will have the fan already on the shaft and some wont, I recommend you get the one with the fan, it cost about the same and you wont have to worry about getting the old fan of the shaft. Usually the fan gets destroyed trying to remove from shaft because it is so brittle from age. Here is the Four Seasons part number: 35345, and the AcDelco part number : 1580666, Murrey part number : 35345, Everco part number : 35345, napa part number : TEM 937731.