First, welcome to the forum! There are many good members who provide excellent advice!
I concur with others to avoid Holiday World which gave me a big "run around" for a headlights "high beam" switch Safety Recall for my Ventana LE that I purchased at NIRV in Lewisville. Given that horrible treatment by Holiday World, I contacted RV Masters (located on Bingle Road at bit north of I-10) and asked if they could perform the Safety Recall work and they said "yes" but I would have to pay them and seek reimbursement from Newmar. RV Masters had to get authorization from Newmar to perform the work. I received the reimbursement from Newmar in about one week after the work was completed.
RV Masters did great work on my previous motorhome and did a nice job on the headlight safety recall. Before driving to NIRV in Lewisville, I suggest that you contact RV Masters and ask them if they can perform Newmar warranty work. If the answer from RV Masters is "no", then I concur with others to take your Ventana to NIRV for the warranty work. Here is the link to RV Masters' website --> https://www.rvmastersinc.com/
Where is your home located in this great state of Texas?