Head Light Ajustment 2003 Monte Carlo

You have to take the headlight assembly to find out why. If it’s broke then it need repaired or replaced. It’s only plastic so it is easily broken.

Answer not posting

Gee, a headlight adjusting corroded after only 20 years..... Spray a lubricant, like WD40 or Liquid Wrench, on it. That'll loosen it so the screw will turn.

If the adjuster is completely broken you can get a replacement at your local auto parts store. Hope that helps! Jim