Question about 2002 GMC Envoy

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Climate control air conditioner stops working due to incorrect ambient air temperature

2002 Climate Control on GMC Envoy. Does incorrect ambient air temperature affect the inside air conditioner cooling? Mine goes from correct to around 27 degrees and air conditioner stops cooling

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  • Anonymous Mar 30, 2014

    climate control blen door

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Same car, same problem. Press MODE, FRONT and REAR buttons together to reset tempreture. You probably need to replace the sensor GM part number 15047946 it is in the front grill email me for a picture. chris.abbott@gmx.com

Posted on Jun 28, 2009

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Most automatic climate controles use outside temp to operate if you look on the front of the vehicle behind grille or ft bumper there should be a sensor with i2 wires on it most are about 2or 3 inches long and about an inch around if you unplug it and you air works again sensor is bad you can leave it unplugged but system wont work its best without it

Posted on May 21, 2009

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Why is my 2003 gmc envoy air conditioner blowing cold air intermittently? ive read something about the ambient air temperature sensor but would really like to be a little more sure if at all possible


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the load ratcheting sound is likely the mode door actuator. It is contains a small motor with gears that turns the mode door to the various positions. Those gears can strip and cause the noise you hear. It is fairly simple to look and feel around under the dash to locate these actuators. There are a minimum of three depending on what climate control you have. There will be one for the temperature control, one for the mode control and one for the fresh air control.

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2 Answers

Air conditioner comes on briefly then stops. The temperature gage on the panel which shows outside temperature is inaccurate sometimes giving a display of -27 degrees.


Well the outside temperature gauge is generally not wired into the a/c. The internal temperature is more important but is not displayed as such. The 'internal' temperature sensor is used to regulate the a/c blending door and blower speed.

When did the cooling problem start?

Aug 10, 2010 | 2002 GMC Envoy

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2002 GMC Envoy..Air works fine out of passenger side but blows hot air out of Driver side


blend door actuator needs to be replaced. dual climate controls have one for each side.

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Gmc envoy 2002 recomennded oil type?


The overwhelming response on GM Envoy forums is Mobil 1 Synthetic motor oil.

The recommend includes using Mobil 1 0W-40 all year. It will give you outstanding protection at low ambient temperatures as well as at high operating temperatures.

Envoy enthusiasts also recommend K&N or Mobil 1 Extended Performan oil filters.

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1 Answer

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