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2007 chevy trailblazer_ls
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Something to add to your vehicle check is a simple "litmus paper" check. Simply dip the tip in you radiator fluid and it will measure the amount of acidity in you coolant. The company I work for does this on every "P.M." check (500 hour oil change) to moniter the fluids acidity. I've never been able to leave the fluid in for the five years they say it will last but then again show me a warranty that last longer than five years. The dealer wants your engine to fail or leak after it expires.:m2:
 
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