You're likely not the original owner, so there is no warranty, but any recall action would still be covered for all owners, regardless of warranty status.
There was (is) a recall on a number of 2015 Keystone trailers with NORCO slide mechanisms. Your trailer is not included in the original recall, but there may be some "end runs" that would include your trailer. Even if it is not yet currently included, the problem should be reported to Keystone and NHTSA. That way, if there's any significant number of failures, you may find that yours is included in the recall which would make you eligible for reimbursement of repair expenses.
You can review all recalls here: https://www.keystonerv.com/owners/recalls/
and the NORCO recall here: https://www.keystonerv.com/media/212...cket_-_web.pdf