Question about 2004 GMC Envoy

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Thermostat on a 2004 gmc envoy - 2004 GMC Envoy

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Please see my tip at http://www.fixya.com/cars/r5929960-s_thermostat . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

On the 4.3L engine, the thermostat is on the intake manifold, whereas on the 5.3L engine it is at the end of the lower radiator hose where it connects to the waterpump.

4.3L

thermostat on a 2004 gmc envoy - a280c86.gif

Posted on Oct 05, 2010

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Posted on Jan 02, 2017

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Where is the engine coolant temp sensor on gmc envoy 2004 xuv


More than likely the thermostat is stuck open. You should replace the thermostat and the temp sensor. See picture below for location.

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Most directions outline removal of the alternator to gain easy access to the hose clamps, bolts and housing of the thermostat. I have located a site that after free registration, has detailed instructions on how to do this job, and the link below that describes an easier method with photos. Check out:

http://forums.trailvoy.com/showthread.php?t=54225&highlight=replace+thermostat

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