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2001 Chevrolet Blazer Question: Where is the B1S2 heater circuit located on this vehicle?

 

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Chumi12, Bethel, MN, October 29, 2013, 17:59
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Got a code P0141 and a P0128(which i understand is most likely the thermostat. Which 02 sensor is the B1S2 sensor on the 2001 Chev blazer?

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