From the latest Prevost warranty. Sort of a common sense thing. If Prevost doesn't supply it, they don't cover it.
02.6 SPECIAL OPTIONS / EQUIPMENTS /SLIDE OUTS NOT MANUFACTURED BY PREVOST
Special options OR equipments requested by the customer and not part of Prevost’s new coach option list although installed by Prevost, are excluded from this warranty policy. Only Prevost’s approved new coach options that are part of Prevost’s new coach option list are covered under this warranty.
Warranties for any other special option/equipment must be handled directly with their respective manufacturer.
Notwithstanding the provisions set forth hereinabove, warranties for slide outs not manufactured by Prevost must, in all instances, be handled directly with their respective manufacturer.