Is this suspension fork user-serviceable?
To expand on Batman's comment, its a BSO because its from walmart and built down to a price from low grade components.

So, the forks will not be user-serviceable.  They won't be serviceable at all even by a shop, and the only way to adjust them is to change them completely.

How do we know its a BSO?  Because the specs say things like 


"Tyres, 29 inch" without mention of width/height
"Front/Rear Derailler - Shimano"   &lt;-- there's a massive range.
"Available at walmart.com"   That's a pretty damning indictment right there.


Its a fine bike for tootling about, but don't sink any money into upgrading it, other than the normal replacement-wear parts like chain, cassette, and brake pads.   If you're interested in riding more and better, save your money toward a better bike.

Answer because its too long for a comment.