Re: 2017 Grand Cherokee Summit
W is for Grand Cherokee. The designaters after that refer to a range of model years. 2017s are WK2. Models of the Grand Cherokee are named - Laredo - Limited - etc.
--- A great resource for you at this point is WK2Jeeps.com - with a link at the bottom of every page here.
If you need a shoulder to cry on ...
... pull over to the side of the road!