Question about 2003 GMC Envoy Xl

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Service engine light is on

I took the truck to auto zone to see why the service engine light was on. It stated that it could be low in coolant, or the thermostat,or the termostat sensor. The coolant is not low, I just had the termostat done. It has to be the sensor. What is that and what is the cost to get it fixed.

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If its a 6 cylinder the sensor is located on driver side behind the alternator .the sensor alone is about 80-100 dollars. but it is difficult to get to if you dont know what you are doing. the shop should charge you 150 to have this done.

Posted on Apr 19, 2009


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