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I have a 2003 GMC Envoy water temperature guage does not work every thing else on dash works

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Check the temp gauge sender unit normally located at the front of the cylinder head it will have a wire on it, by removing the wire and grounding it, this will make the temp gauge go to full. If so replace the sender unit, if not recomend after market gauge reccomended

Posted on Nov 26, 2013


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Posted on Jan 02, 2017

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SOURCE: Location of coolant temperature sensor on 2003 GMC

on the left front of the block by the alt. 4.2 L engine

Posted on Feb 24, 2010

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SOURCE: 2003 GMC code P0128

PO128 insufficient ambient temperature.your thermostat is either sticking open or you have the wrong temperature rating it should be 195 degrees.

Posted on May 30, 2009

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SOURCE: 2003 gmc envoy 4x4 not working

My 2005 Envoy 4WD is not working. Switc is currently on 2HI, but light is showing AWD. What is the problem???

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