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Dexacool Radiator fluid. Don't use the cheaper stuff that they sell at auto parts stores because it will not work the same. I used the cheap stuff in my other GM car that I use to own, and I noticed the car was running hotter. When I checked the fluid, it was gunked up. Really weird. I re-drained the system, filled it up with dexacool and had no problems after that.

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16y ago

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