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