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Replacing coolant reservoir (gen 1)

1.3K views 5 replies 6 participants last post by  BDCCruze  
The benefit of doing a drain and fill is to change out plastic coolant parts at same time like the outlet and thermostat plus radiator sensor etc if the mileage dictates.
Right, 5 years or 150k miles is the GM spec for replacing Dexcool. Just do it all at once if you are due.