Yes they are great about helping you
Lowe's has always been good about researching items for me and sometimes ordering them and I'll pick him up at the store the item number is definitely a good choice or bring the old one to the store
The model number of the fridge and the part may be different as they are manufactured separately. The best option is to find the item number (not the model number) for the part itself and call and ask a sales associate. A quick search of their website does show a large variety of filters for whirlpool so you might have better luck ordering from the website directly.
I am sorry but I am a consumer like yourself.. So I don't know
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