GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Astro - 2WD 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Headlight System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1
  1. Turn the headlamp switch to the HEAD position.
  2. Turn the headlamp dimmer switch to the LOW position.
  1. The low beam headlamps are ON.
  2. The high beam headlamps are OFF.

2

Turn the headlamp switch to the HIGH position.
  1. The high beam headlamps are ON.
  2. The high beam indicator is ON.
  3. The low beam headlamps are OFF.

3

Turn the headlamp switch to the OFF position.

The high beam headlamps come ON at a reduced intensity (indicating DRL mode).