My low beam lights don't work but my high beams do
Have you replaced the bulbs?
If both lights failed at the same time, it's probably the headlight relay, located in the fuse panel under the hood. Sometimes one headlight will fail, people don't realize it. Later, the other light fails. In this case it would be the bulbs.
Looking for a Used TrailBlazer in your area?
CarGurus has 4,286 nationwide TrailBlazer listings starting at $1,500.
Search Chevrolet TrailBlazer Questions
Chevrolet TrailBlazer Experts