Offroad Trailblazers and Envoys

Climate control temp sensor question....

Something not working right?

by Josh1982 » Wed Feb 01, 2012 1:34 am

Ok, so I'm new and either my Google-Fu is off kilter or I have something that hasn't happened to anyone on the board. So I bought the TB last week and noticed that the exterior temp reading on my climate control cluster always reads 50 degrees and hasn't moved. The numbers cycle fine when adjusting driver or passenger temperatures but when it goes back to the ext temp, it just sits at 50. I dont have a repair manual yet so I'm wondering where the ext air temp sensor is located so I can test it or is there something else entirely I'm missing and need to be informed of?

Thanks! :work:

Josh
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by fishsticks » Wed Feb 01, 2012 3:41 am

There's a sensor on the radiator shroud that reports the temperature. Mine had some dirt in the connector and did this exact thing. Some have had to replace the sensor. I believe it's around $8 from the dealer.
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by DirtyBacon04 » Wed Feb 01, 2012 5:08 am

Probelm solved.
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by chevycrew » Wed Feb 01, 2012 7:49 am

My exterior temp (in the mirrow) was reading OC, so after some searching I found I didnt have a sensor installed. Rockauto to my door for $10 and good to go.
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by Skindiggers » Wed Feb 01, 2012 8:29 am

My temperature sensor is doing the same thing , i have it in Celsius and is reading 10 degrees all the time ... don't worry mine is like this since 2 years ago ! LOL
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by plaen » Wed Feb 01, 2012 2:12 pm

fishsticks wrote:There's a sensor on the radiator shroud that reports the temperature. Mine had some dirt in the connector and did this exact thing. Some have had to replace the sensor. I believe it's around $8 from the dealer.



My 02 did the same thing tried resetting the hvac controls, still read 50f, replaced the sensor, in the plastic behind the front grille, 5.89 at the dealer here, worked perfectly.
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by Josh1982 » Wed Feb 01, 2012 7:55 pm

Sweet, I will make a call to the dealer and move on.

*EDIT* Swapped in a new sensor to test and got nothing. Still reading 50 degrees so now I will trace down the wire and see what all is goin on...

*EDIT* My wife got in the truck afterward and all the sudden it started working. Whatever, at least it's working!
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by Skindiggers » Fri Feb 03, 2012 1:42 pm

Does anyone knows the GM code for this outside temperature sensor ?
If it's so cheap i might order it too.. I had enough of this 2 years looking at that display showing 10 degrees all the time ! LOL
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by plaen » Fri Feb 03, 2012 6:09 pm

Skindiggers wrote:Does anyone knows the GM code for this outside temperature sensor ?
If it's so cheap i might order it too.. I had enough of this 2 years looking at that display showing 10 degrees all the time ! LOL


Part number 15047946, there is also after market ones from rock auto, but shipping just for it wouldn't be worth it to save the 2 dollars from the dealer.
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by Skindiggers » Sat Feb 04, 2012 8:45 am

Thank you very much bro..
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