This book tells all. Read a review by the editors of Beginners Guide to RVing.
Warranty is a manufacturer's warranty.
It doesn't come from a dealer or third party, and it's not an extended warranty. It comes, instead, from the people who build Jayco recreational vehicles to the people who buy them. Each Jayco is warranteed to the original purchaser for 24 months from the date of purchase against defects in materials and workmanship. The Jayco warranty includes a three year structural guarantee. Before buying an extended warranty, be sure to get a quote from Warranty Direct.