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2004 Chevrolet TrailBlazer EXT LS 4dr 2WD

2004 Chevrolet TrailBlazer
Trim Info:
Rear Wheel Drive, 4 Door
15 mpg city / 19 mpg hwy
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June 4, 2013, 7:58 am

Terry B
 

Question: why is it over heating

gauge goes up after I have driven for a little while it reaches the halfway mark and then advances a little further. doesn,t matter if i,m driving or sitting still. then if I turn my heater on the gauge goes back to normal. have replaced water pump and thermostat


 
 



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