change thermometer from celcius to Fahrenheit
https://assets.gm.com/manuals/chevrolet/2007_chevrolet_silverado_%20owners.pdf /The owners manual, Page 249 shows there is a temperature sensor for exterior temperature behind the grille but makes no mention of settings for it
Search Chevrolet Silverado 1500 Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Chevrolet Silverado 1500 Experts