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temperature sensor in rear view mirror

tomseeley

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tomseeley Enthusiast

tomseeley

Posted
Posted

This isn't actually specific to my 2500HD dmax/ally, but that's what I have, and I want to ask, so I will!

 

Mine's a 2002 I bought used last March. It runs great. However, one little thing does not work right: the temperature sensor that's supposed to give me the outside temp on the little window in the inside rear view mirror doesn't work right. It nearly always says it's -40 F outside!

 

BUH-LIEVE me, it's not worth much $$$ at all to make it work right. I can always just climb out of the truck to figure out if it's cold outside!

 

But I'm curious. Where is the sensor itself? I suspect it's under the hood somewhere, but when I took a glance yesterday, I didn't see it in plain view.

 

Like I said, just curious...but assuming I CAN find it, is replacing it a simple DIY task?

 

Thx.

 

Tom

lrymal Senior Enthusiast

lrymal

Posted
Posted
...But I'm curious.  Where is the sensor itself?  I suspect it's under the hood somewhere, but when I took a glance yesterday, I didn't see it in plain view.

 

Like I said, just curious...but assuming I CAN find it, is replacing it a simple DIY task?

 

 

 

On my '03 and '05s, it is behind the grill. Just plug 'n play. Easily revealed when you remove the grill to clean bugs from the condensor / radiator area.

tomseeley Enthusiast

tomseeley

Posted
  • Author
Posted

>>On my '03 and '05s, it is behind the grill. Just plug 'n play. Easily revealed when you remove the grill to clean bugs from the condensor / radiator area. <<

 

remove the grill. huh? OK seeley, see how much trouble you get yourself into when you ask a simple question?! How do I remove the grill? I assume that once I actually pop the hood and start looking around i'll figure it out, but since I can't go online while I'm simultaneously working on the truck, I thought I'd ask for help first!

Shaners Senior Enthusiast

Shaners

Posted
Posted

On my '05 I can easily see it fastened to the radiator. There is a wire loom that comes across the rad, and then just dead-ends at a little stub, that I'm assuming is the sensor.

Tor Diesel Enthusiast

Tor Diesel

Posted
Posted

Anybody had their sensor read "ice"? Mine said that his morning - 35 degrees and no moisture in sight. I was wondering what that was all about. My sensor is not very accurate in the summer - will read 121 when the vehicle is stationary but it seems quite accurate in the winter.

lrymal Senior Enthusiast

lrymal

Posted
Posted
Anybody had their sensor read "ice"? Mine said that his morning - 35 degrees and no moisture in sight. I was wondering what that was all about. My sensor is not very accurate in the summer - will read 121 when the vehicle is stationary but it seems quite accurate in the winter.

 

 

 

Getch yer manual and read.... :) That is all explained.

Shaners Senior Enthusiast

Shaners

Posted
Posted
Anybody had their sensor read "ice"? Mine said that his morning - 35 degrees and no moisture in sight. I was wondering what that was all about. My sensor is not very accurate in the summer - will read 121 when the vehicle is stationary but it seems quite accurate in the winter.

 

 

 

 

It reads "ICE" when the temp gets close to freezing. This is to alert you for possible black ice on the road.

 

It isn't a big deal when you go out and jump in your truck in the AM, but it can be helpful when driving through the mountains etc, when temp changes can be more drastic.

mmmikkke Senior Enthusiast

mmmikkke

Posted
Posted
Anybody had their sensor read "ice"? Mine said that his morning - 35 degrees and no moisture in sight. I was wondering what that was all about. My sensor is not very accurate in the summer - will read 121 when the vehicle is stationary but it seems quite accurate in the winter.

 

 

 

 

It reads "ICE" when the temp gets close to freezing. This is to alert you for possible black ice on the road.

 

It isn't a big deal when you go out and jump in your truck in the AM, but it can be helpful when driving through the mountains etc, when temp changes can be more drastic.

 

 

 

 

Can also be annoying.

 

Why can't we be allowed to think for ourselves that when it's 35 degrees there could be ice on the road? In fact, I'd rather know that it's 33, 32, and then 31 degrees as I increase elevation. Instead, I have to keep taking another look at the readout until I can finally catch it while it's not saying ICE.

lrymal Senior Enthusiast

lrymal

Posted
Posted
...Why can't we be allowed to think for ourselves that when it's 35 degrees there could be ice on the road?  In fact, I'd rather know that it's 33, 32, and then 31 degrees as I increase elevation.  Instead, I have to keep taking another look at the readout until I can finally catch it while it's not saying ICE.

 

 

 

OK, GM gets condemned for not having some sort of cold weather hazard warning on their early mirrors that had displays. Sooooo, in keeping current with the competition, GM installs the current crop of mirrors that has the ICE warning and guess what? GM gets condemned again for having it.

 

Geeze, danged if you do, danged if you don't. :)

 

Read the manual and it will also state that it stays on for only a couple of minutes then winks off until changes have it come on again.

Tor Diesel Enthusiast

Tor Diesel

Posted
Posted

Thanks to all for answering my question. Curiously a couple of weeks ago we had temps down to 22 degrees and yesterday was the first time I saw "ICE" displayed on the mirror. I went through the owners' manual but I keep getting bogged down by stuff like lowering the spare tire and unlocking it with the jack. Now I just need to know what size fuse goes in Stud 1 and my life is complete.

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