2002 Chevy Truck Red and Green Anti-Freeze

2002 CHEVROLET TRUCK
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DANNO719
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2002 Chevy Truck

I added about 2 qts. of green anti-freeze to a Chevy truck that has dex-cool coolant in it. I read on a couple websites that mixing the two COULD be of some concern. Is this enough to warrant flushing the system? Or, should it be OK?
Dec 13, 2009 at 7:54 AM
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BLUELIGHTNIN6
  • ✓Experienced Mechanic
  • 16,542 POSTS
no need to get a flush immediately. mixing the conventional coolant with Dex-Cool simply degrades the service interval (approx. 150k miles down to 30k miles). you can run it like this for around 30k miles or 2 years , then you will want to drain and refill with proper Dex-Cool which will then last for 150k miles or around 5 years.
Dec 13, 2009 at 8:39 AM
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