Have you done a battery/starter/alternator check to see how things are doing?
I just replaced the stock battery from my 19' a few weeks back because on cold start it was not as quick and snappy a start (if that makes sense...lol).
I did my research here on the forum and upsized to the H8 battery size (H7 is the stock battery and is 730cca I believe).
I put in a new Interstate H8 AGM battery and now have 900cca, and she fires up quick and snappy now.
I do have an upgraded audio system as well, so the bigger AGM battery helps keep the system happier too.