These ranges require a 4 prong outlet (many come with the cord attached to be sure that a 4 prong is used). The amperage is same as it is for most ranges 40 amp.
We would need a bit more information to give you the exact installation specs from Sears. We can find this if you would like. Please post the complete model number which should look something like this -
xxx 77553 xx
It will be on a sticker on the range (usually down behind the storage drawer on the frame).