To be able to really provide help for your issue we need more info.
What Model Itasca?
What "stabilizer" are you talking about? A leveling jack perhaps?
Assuming it's a hydraulic leveling jack - which is totally a guess that this is what you mean by "stabilizer" - the seals can be renewed and the jack rebuilt by any competent hydraulic repair shop. Just remove the jack and take it into the shop.
Obviously, Winnebago has made hundreds of models over the decades so we pretty much need to know the Year, Model and Floorplan of the RV every single time you ask a question about it.
2017 Winnebago Adventurer 37F
2016 Lincoln MKX Toad