GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Turn the ignition switch to RUN.
  2. Place the HUD dim switch to maximum intensity.
    • The following components illuminate for approximately 4 seconds:
      • The check gauges indicator
      • The fuel indicator
      • All segments of the digital speedometer
    • After the 4 second segment test, the HUD speedometer displays 0.

Head Up Display (HUD) Inoperative

2

Move the HUD dim switch from maximum to minimum intensity.

The HUD image intensity dims.

Head Up Display (HUD) Image Intensity Not Variable

3

  1. Move the HUD dim switch to maximum intensity.
  2. Use the HUD up/down switch in order to move the HUD image up and down.

The HUD image moves up and down on the windshield.

Head Up Display (HUD) Image Height Adjustment Inoperative

4

  1. Start the engine.
  2. Drive the vehicle.

The HUD speedometer displays approximately the same speed as the instrument cluster.

Head Up Display (HUD) Speedometer Inoperative

5

Press the ENG/MET switch.

The HUD speedometer and units (MPH or km/h) indicator change between English and metric.

Head Up Display (HUD) Does Not Switch Between English/Metric

6

  1. Turn on the hazard flashers switch.
  2. Turn on the headlights.
  3. Place the headlamp dimmer switch in HIGH.
    • The left turn signal and right turn signal indicators flash.
    • The high beam indicator is on.
    • The HUD dims with the headlights on.
    • The HUD high beam indicator is on.

HUD LH Turn Signal, Right Turn Signal and the High Beam Indicators are Inoperative

7

  1. Use the IP dimming switch in order to vary the intensity of the instrument cluster display.
  2. Turn off the headlights.
  3. Move the HUD dim switch to the minimum intensity (OFF).

The interior dimming switch varies the HUD image intensity with the headlights on.

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