Originally Posted by JaxGXP
While we are on the subject of maintenance intervals for trans-axles I would like to ask if anyone has experience regarding cooling system maintenance on the GXPs. I know the owner'* manual indicates the interval for flushing the cooling system is 150K or 5 years. The 150K seems a little optimistic to me. Can you really expect a Dexcool system to go this far without corrosion occurring?
From what I remember, dexcool should be replaced every 100k, or at least that'* what the recommendation was before. I had mine replaced at 50k during service of the water crossover gaskets, but I really wouldn't take a chance goin 150k with the factory coolant fill considering its an all aluminum block with aluminum heads. I'd get it done at 80-100k if it hasn't been done during replacement of the water crossover gaskets.