GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Turn the combination switch to the LO position.

Both headlights operate at low intensity.

Headlamps Inoperative - Low Beams

Headlamps Inoperative - One Lamp

Low and High Beams Headlamps Inoperative

2

Push the combination switch to the HI position.

Both headlights operate at high intensity and the high beam indicator lights.

Headlamps Inoperative - High Beams

Headlamps Inoperative - One Lamp

Low and High Beams Headlamps Inoperative

High Beam Indicator Inoperative

3

  1. Turn the combination switch to the LO position.
  2. Pull the combination switch to the PASS position and release.

Both headlights operate at high intensity while the combination switch is in the PASS position.

Headlamps Flash to Pass Inoperative

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.