2004 Chevrolet Trailblazer Q&A

2004 Chevrolet Trailblazer Question: Are my preset radio buttons ALL suppose to illuminate,also both temperate slides

just bought vehicle. only buttons 1, 2 are illuminating at dark, along with only one side of the temperature slide for vents. Nothing in manual about illumination. Hard to see them at night. -
Answer 1
poss bad bulbs or circuit board inside.not sure if they are servicable in these units -