Our gauges still work in our '03 Classic.
But it did take awhile to learn/guesstimate when exactly we would run out of FW...it could show red for up to four days. 🙄
We finally learned to depend on the water pump, when it wouldn't shut off we knew we needed to fill-up.😂
The black & grey gauges we managed to keep working with a thorough fill & flush after each trip.
I've found it best to not dump the black without driving 100mi or so to really mix the crap up. SFSG.
The GEO METHOD
"Any nation that can survive what we have lately in the way of government, is on the high road to permanent glory."
"Mary-Jane....'cuz 2020 sucks"