Gauge bounces a bit...down then up. Auto zone fan may be done 5 yrs. Lifetime...tried to r/r it but new one had stripped threads. Looked so good just put old one back on for the time being.
My brother did 5 transmissions. All less than 50,000 mi. I added two coolers with sensible driving. Trans in over 200,000 mi. And regular service. Fluid stays red.
People get leaks after r/r head gaskets! Engines use oil new from factory. GM used these tablets new from the factory. Machine shops over cut heads.... the 6.5 is not a holy relic that needs a red carpet treatment. My diesel guy who has a very successful bus in town says that the tablets work...