Ok, stumped and hopefully someone else has seen this. 97 c3500 2wd 454. Just replaced, Cylinder heads, gaskets,water pump, failsafe 195 t-stat, 4 core HD radiator, hoses, ECT sensor, and temp sending unit, and cluster. All done for maintenance purposes for hauling our travel trailer.
Isles great, no overheat, drives great, no over heat, my solus scanner says it's running 195 all day, only got as high as 198....temp gauge says 220, changed sending unit and cluster, same dealio..
Anyone one thinking short in a wire? It's a 150k mile south Carolina truck.