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I was going do a coolant flush - bought Prestone Extended Orange stuff (Dexcool) it says GM approved.
Question, I expected to pull orange coolant out but its Red.
GM recommends their stuff or havoline? Is GM stuff or Havoline Red?
Reason, I ask is DexCool is what is supposed to go in the engine but I'm not sure exactly what is in there now since its Red, I could assume its Dexcool but it could be ethyl Glc and just have red dye in it?
Advice? Because you are not supposed to use different types mixed together.