Thanks guys, now thinking about it, the EGR feature should have hit my aging brain earlier. They say there's no stupid question for us relative beginners, but I think I pushed the envelope on that one (slap face now)!
(one week away from picking up our new coach from Guaranty RV)
See ya down the road sometime.
Ron in NW Oregon
2017 Ventana 3436
2021 Chevrolet Spark LT