My sister has a 93 3/4 ton Sub with a 454 Auto and towing package. She says it will over heat going to the store (5 mi.) She said that her husband replaced the thermastat and it still over heats She also said that it has an electric fan that is not working. Did the come with electric fans on top of the engine drivin fan. I told her to tell her husband to to trace the wires coming off the fan and the shold lead to a thermastat of some sort. All the thermastats for an electric fan I have ever seen were screwed into the radiator or were atatched to it some how. She live's in a diffrent state than I do So I cant look for myself.