Questions & Answers for: Chevrolet TrailBlazer dex cool

...Dex Cool has a life of 5 years or 150,000 miles which ever comes first. Replace the thermostat also and buy the fail safe thermostat, it cost a bit more but worth it. Service the engine (spark plugs ...

dex cool leak the most common coolant leak if the water  pump but i have seen a few cylinder heads fail look for milky looking engine oil

...dex cool Lots of debate on this topic, the Dex Cool seems to rot out the system, lots of documentation on this. I swapped mine out for the green. However, if you're adding fluid, use what is already ...

...look like ? Did you use Dex-cool GM antifreeze , can't mix regulator green anti freeze with it . turns to a muddy look stuff an clogs heater cores . Touch the heater hoses , are both the same temp