[larryweikart]

I had a similar experience a few years ago, on top of a mountain just 20-30 miles east of Kingman, Az but we thought it was the engine compressor until we replaced it and it didn't change anything. So I unhooked the air suspension trailer and nursed the coach to a mechanic friend of mine who located the dryer. I don't remember a pressure gauge though. Is your air dryer located by the drivers side rear wheel? I just completed the same route last week, only I left Phoenix on Friday and traveled thru the mojave and Bakersfield on my way to my current location in Monterey.