Well you might have a REAL COOL Humv?
I not a fan of just changing stuff, just to be changing stuff. Were any tests made to really see whats going on. Maybe yours is OK and mine is wacky below.
Mine runs 190 to 220 +/- a couple degrees. Always in some state of swinging between the high and the low temps while holding for a minute at the high or low ends. Never a steady state in my rig.
With 117 desert degrees outside or hard engine loads... gets up to the 220 side in few minutes, hangs there a moment, Fan kicks in with a roar. In less than 30 seconds temp is slowly on the way down to 190. Fan turn off...holds there for a minute and slowly rising. Rarely see temps over 220 and if so the fan pulls it right into range. Fan is always cycling. There is a lot hysteresis in the system due to retention of heat in the block, switch action, air and water flow.
Don't see temps below 190 +/- either... unless it warming up, OR is cold as "freeze your buns OFF!" And forgot the cardboard radiator blocker. LOL
Now in cooler weather like we are heading into or even winter temps of 35, the cycling is extended to greater times. Time being miles (more or less) I can run for 5 or 6 miles before cycle times.
As stated I don't see a steady state for very long at the high or the low numbers. Mine is like a real s l o w heartbeat.
Another CAMO mod is I have a dash indicator (simple inverter circuit & LED) connected on my Cadillac valve solenoid showing fan action. Most of the time the fan run times are very short. About a minute at speed.
Light and blast of hot air. It's alive, CAMO
My results. YRMV. No animals were hurt in these observations. Maybe a few bugs.