Question about 2004 Chevrolet TrailBlazer
The check engine light is operating correctly as the computer reads a spike in temperature range in the engine. Your problem is more than likely a bad thermostat. I have seen times when a bad or loose radiator cap would cause the same symptoms. If the radiator cap has been removed recently it could be that it is just not on correctly. Make sure you check this only when your engine is cold. Hope this helps you out
Posted on Feb 07, 2010
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Posted on Jan 02, 2017
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