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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???

Posted on Sep 13, 2010

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1 Answer

How do i fix my guages in my 2003 envoy


Look for the fuse marked ga. should be a 5 amp.

May 16, 2014 | 2003 GMC Envoy

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I have a GMC Envoy 2003 the dash guage does not work how do I figure out the problem is it a guage or fuse or sender unit


You will have to unplug the in-tank unit's connector,and figure out which wire is the fuel level sender.If you ground it,the gauge will go to full or empty(can't remember which)and it will go to the opposite extreme when you unground it.(Most likely the sender is bad,and if you are pulling out the in-tank unit,do yourself a favor and replace the fuel pump at the same time).

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1 Answer

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This should be a 1 to 1-1/2 hour job. Also, have the mechanic change the thermostat and temperature sensor while he is at it, if they have not ever been changed.

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1 Answer

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check globes and check brake light switch under dash on brake pedal.

Oct 27, 2009 | 2004 GMC Envoy

1 Answer

2004 Envoy won't turn over and guages don't work


Check and make sure that both battery connections have a SOLID connection...Make sure they are both clean...If they are not clean take them off and simply take a wire brush to them...If this does not work consult someone else

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1 Answer

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There is a Sending Unit for the Gas Guage Under the Dash I Believe. It usually Runs about $750.00 Just for the Unit. I agree with you!

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1 Answer

2003 GMC Envoy lower 3 heater fan settings quit working.


had same problem on my XUV. changed the blower motor resistor, located under passenger side dash. easy to change, works no problem.

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2 Answers

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