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Anyone know how to reset outside temperature sensor? on 2007 Chevrolet Trailblazer

It stuck on 20* when it's 50* outside, any help would be appreciated.This problem started yesterday.Auto Temp control 4.2 L.

Thank You

Asked by for the 2007 Chevrolet Trailblazer
Got owners manual? Is it set to the right scale? ----- Well i checked 20°C = 68°F so that ain it.
Does it change at all? No big deal to some but i like my stuff to work too! It has a sensor prob. behind the grill
that can be changed if needed. Check manual, or try unhooking neg batt. cable for a min. That's all I know.
Never had a problem with one. Might be able to scan test body control module to read data. Compass working?
Post results when fixed.
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1 more answer
AGREE WITH WETRY POSS C TEMPS INSTEAD OF F TEMPS