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Re: No Heat: Check the Dextron Fluid Levels
make sure you have the correct levels inside the radiator. 2003 winter
was really cold and I found that the dextron needed to be replaced.
Some people think that you can leave the fluid in there for 5 years.
Well your making a mistake. GM says Five Years 100000 miles.
If the dextron is weak than you will have no heat. Also check your
thermostat and make sure you change your fluid every three years.
A radiator flush helps. Some of the new TrailBlazers get really hot
93 degee's and up there. My 96 Blazer gets up to 90, even after its
been running for over an hour.
At 78000 I had the dextron replaced had a flush and replaced the
thermostat. The heater core was fine.
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