2003 Chevy Avalanche compass and thermometer on rearview mirror went out. What could be the problem?

Did you check both fuse boxes and did you check to make sure that there is voltage to the fuses?

It is going to be the seal in your moon roof. Unless you have holes in the top of your car you can be sure that the water is coming from there.

2003 Chevy Silverado
our rearview mirror has gone off and the airbag light stays on.
i've determined that this is a fuse, the SIR fuse under the hood, but what I can't figure out is why it's blowing.
It's either something to do with when we hook up the lights to the trailer or it might be from where we installed a new car stereo.
I took it to the Chevy dealer for some other things and told them there was a fuse blown to the rearview mirror and to the airbag and just asked them to replace the fuse while it was in the shop.
on top of the $700 i was already spending, they charged me $98 to diagnose that it was a blown fuse and like $11 to change it, even though I already told them it was the airbag fuse. Highway robbery. And they wonder why we don't like 'em.

Temperature Display
The inside rearview mirror supplies a 5 volt signal circuit and low reference circuit to the ambient air temperature sensor. The inside rearview mirror monitors and records the voltage on the signal circuit of the ambient air temperature sensor. The inside rearview mirror uses this recorded voltage to display the temperature on the temperature display portion of the compass/temperature display. The temperature display will show "ICE" when the ignition is first turned on and the current temperature is 3°C (37°F) or below. The display will toggle between "ICE" and the actual outside temperature for approximately 4 minutes.
The mirror will display "OC" if the mirror senses a temperature of less than -40°C (-40°F).
the mirror will display a "SC" if the mirror senses a temperature of greater than 112°C (143°F).



Replace the inside rearview mirror with compass. Refer to Inside Rearview Mirror Replacement .

it is defective, they are not repairable, we just replace them, they are very expensive about $300

CHECK PASSENGER FUSE BOX FOR A BLOWN FUSE.

sounds like a fuse blew if both went out check fuses first

replace outside sensor

Yes. Look in the Fuse Panel inside the Truck. Use a Good Maglight or LED Flashlight and Hold it Behind the Fuses to see the Blown Ones. It is usually in an AUX Outlet. Also check thr Fuse Relay Box under the Hood for a Blown Fuse using the Same Method. See if there is a Relay for this also. If so, Replace it. Let me know if you need any more Help! Please Rate my Response, I need all the Help That I can Get!

Hiya...ALL factory-installed rearview mirrors are installed with different wires due to options.
About 6 different rearview mirrors are installed with those options such as On-Star, light, compass, and those features which use different wires....THIS CANNOT be modified with different rearview mirror....**for example, the Equinox owner attempt to pull out a factory-installed base rearview mirror and put in different one that has compass/temperature built into the rearview mirror**

However, the wires are located inside the front headliner which requires removing the sunvisor (and possible removal of interior plastic trim part at the left/right ends of the windshield) prior to pull the headliner down, and a small metal philips or torx screw is used to secure the rearview mirror onto the bracket glued to the windshield.

The best solution is to leave the original factory-installed rearview mirror in place.