If Guaranty RV INC, doesn't stand up and redo the work, at their cost, call you insurance company. You insurance adjuster can call them and work it out. I called numerous repair places for our clients when I was doing damaged car estimates for Farmers.
Your insurance company can black list them if they don't stand up to their warranty and they will loose a lot of business from other insurance companies as well.
Retired Army, Disabled Veteran
Wife, me, and 2006 Coachman Cross Country 372DS makes three, Demco Kar Kaddy SS