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Mack GU Truck coolant fill fitting
Posted to HD/Fleet Forum on 7/17/2012 3 Replies

Can anyone fill me in or have any tips on the coolant fill procedure, Also Im looking for a tool number and or where to get the fitting that fits the bottom of the radiator? I guess its a bottom fill job....Any tips on this would be a great help...Thanks 2009-... Login to read more.

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