Outside Temperature Reading

[Bikerjon]

On 1/22/2025 at 6:01 PM, Jus Cruisin said:

I haven't even wanted to look at mine lately. Extremely depressing looking at single digit numbers. 

Me either. Its been cold here lately. Below zero for highs some days.

[MattWW]

I've had several (5) GM trucks with outdoor temperature sensors and every one of them displayed a very accurate ambient temperature under normal conditions. That is, until I recently got a 2022 Silverado 2500 HD. It's not really important, just annoying that it isn't right. It is consistently 5 degrees higher than actual. It isn't the sun or a bad temperature reading on my iPhone, since I never had this problem with my other vehicles. I'll probably replace the sensor at some point but I have a suspicion it has to do with the location (passenger side mirror).

[Mcflygb79]

On 1/22/2025 at 8:11 PM, redwngr said:

Is it that far out all the time or just at start-up?

All the time!

[Mcflygb79]

On 1/22/2025 at 3:07 PM, GMCustomerService said:

We regret to hear of this concern revolving around the temperature reading in your vehicle and would like to investigate further on our end. 

It’s obviously a common issue. What’s gm doing to fix this?

 

[redwngr]

What temperature measurement source are you using to compare with the truck? 

 

 

Edited March 17, 2025 by redwngr

[Transient]

On 3/16/2025 at 9:12 PM, Mcflygb79 said:

It’s obviously a common issue. What’s gm doing to fix this?

 

They will do nothing

[tbarn]

Well, here is partial diagnosis of the outside air temp sensor per the General.

 

1. Verify the scan tool ECM Ambient Air Temperature parameter is within 15°C (27°F) of actual ambient temperature.
   • If not within 15°C (27°F) of actual ambient temperature

     Refer to Circuit/System Testing.

   • If within 15°C (27°F) of actual ambient temperature
2. All OK.

Hard to believe, ain't it!

[KJB5150]

"This is all going to depend on where you are getting your weather data from.  The truck is probably more accurate than you think unless you've got a weather station at your house or are pulling local weather data from someone who has one running on weatherbug or weatherunderground, etc. "

 

My 2021 Silverado will display readings of outside temperature in the mid +50's, and then -45 within 10 minutes of each other.  Currently it is reading +45 outside during an actual blizzard when I know it's in the teens outside in Traverse City, MI..  So, no..  I don't believe the truck is more accurate than I think.