2002 GMC Envoy Q&A
2002 GMC Envoy Question: Digital Climate Control shows inaccurate outside temperature.
The digital climate control has been displaying the wrong outside temperature. Today the outside temp was 85 degrees. The display showed 21 degrees. This disables the air conditioning. After driving 5-10 miles, the displayed temperature will start to go up thus allowing the air conditioner to work. - JimmyC_1
Sounds like the sensor may be bad, causing the incorrect reading. The way these are checked is with an ohm meter, and you will need the specification from GMC. You check the resistance of the sensor, and at a certain temperature it should have a specific resistance. As with any problem like this, visually inspect the sensor and wiring first. - Bret Bodas