Kay, welcome to the world of Class Bs!
I own a 2007 Roadtrek 210P which is very similar in most ways to your 190 and I am sure many of us on this forum can help you. You might answer a few basic questions for us.
First of all, although you are a first time owner, have you had any previous experience with a RV including trailers?
2. Did you buy your RT from a dealer or an individual?
3. Did you have the chassis (Chevy) checked out before purchase?
4. Did you have the RT stuff (refrig, AC, generator if there is one, heater, plumbing etc.
checked out by someone?
Those basic questions could be helpful to forum members in order to assist you.
By the way, if you go to roadtrek.com and click on support you can download a nice manual (assuming you don't have one) for your specific RT by model and year. RT has the best manuals that describe the "stuff" I have ever seen.
Paul in Oklahoma City