OK, I drive a gasser, I know, but we have a G3500 van on the farm. It is a 00 with 90k. We bought it this summer, and we noticed that temp gauge hardly moved, and presumed it was the themostats. It is cold now and needed it fixed and the tranny flushed. I was assuming that the thermostats would be covered under the 100k warranty, but were not. So are they or aren't they??