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I'm having same problem fan on and off constantly. Has anyone found a remedy? 2006 Mack Granite 375 HP

does the temp get hotter when you run it on highway or when you going thru the city, mine is like that on the highway, i changed the theromstat, water pump, and that didnt help, i gotta granite also but mine is with 460, good luck if you find out whats wrong please let me know!


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