Question about 2003 GMC Envoy Xl

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How to replace thermostat on a 2003 gmc envoy xl 4.2L

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Remove the alternator, drain radiator, remove the drivers side tire to gain access.

Posted on Jan 08, 2011

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1 Answer

Where is the tail light fuse?


The tail light fuse is under the rear seat on the drivers side.

Jan 17, 2016 | 2003 GMC Envoy

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How to Install 2013 Sierra Stereo in 2003 GMC Envoy XL SLE With Bose


You may lose the Bose amp too. That would be no sound from the speakers too. I don't think they will exchange.

Jun 19, 2014 | 2003 GMC Envoy

1 Answer

Thermostat replacement


Pain- need to remove drivers side tire to get to it. Need to remove alternator bracket too. Top bolt is the hardest to get to. While you\'re in there, replace the temperature sensor too...it\'s right above the thermostat.

Feb 01, 2014 | 2003 GMC Envoy Xl

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Transmission problems


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Jul 04, 2013 | 2003 GMC Envoy

1 Answer

How do you change the sensor for the check engine light that produces the Code 0128?


You'll find that this is actually your thermostat, not the actual sensor itself. Your thermostat is sticking open causing it to run too cool. Replace the thermostat, and that light will go out. I went a year with this problem, replaced the sensor twice, light would still go on. The bad thermostat was causing bad readings by the sensor. Very common problem for Envoys and Trailblazers.

Oct 26, 2010 | 2003 GMC Envoy Xl

1 Answer

I need to change my thermostat on my 2003 gmc envoy and do not know where it is located


its behind the alternator ,thermostat and housing is 1 unit,cant be purchased separately.

May 15, 2010 | 2003 GMC Envoy Xl

2 Answers

2003 GMC envoy heater fan motor will only work on high setting


You need to replace the blower motor resister to get the other speeds back.

Dec 16, 2009 | 2003 GMC Envoy Xl

1 Answer

I have 2003 gmc envoy my front ac control does not


Need to check to see if the blower motor is running.If it is,but not threw the vents,most likely a vent door actuator motor.The actuator motor in this case would be bad,it is hard to get to,unless you are mechanically inclined,You can do it your self.If the blower motor is bad,just replace it.Check fuses first,and the blower relay.If I can help,let me know.

Aug 29, 2009 | 2003 GMC Envoy Xl

5 Answers

Check engine light on - 2003 gmc envoy XL


That code represents a lower than expected reading for temperature (coolant). First thing to do is check your coolant level, as if it is low, then the sensor can not read correctly. Second, you may have a thermostat that is stuck open, allowing the coolant to cool off too much. The sensor should be mounted on top of the engine, near the thermostat housing.

May 18, 2008 | GMC 2003 Envoy XL

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