GM Service Manual Online
For 1990-2009 cars only

HUD does not Change Display Modes

Step

Action

Value(s)

Yes

No

1

Were you sent here from the HUD Diagnostic System Check?

--

Go to Step 2

Go to Head Up Display (HUD) System Check

2

  1. Turn OFF the ignition switch.
  2. Move the head-up display dimmer switch to the full bright position.
  3. Turn ON the ignition switch.

Do all segments of the head-up display illuminate for 3.5 seconds?

--

Go to Step 3

Go to Head Up Display (HUD) Inoperative

3

Press and release the PAGE button to scroll through the following head-up display modes:

    • Speedometer
    • Speedometer and gauges
    • Speedometer and Tachometer
    • Speedometer, Tachometer and Gauges
    • Tachometer

Does the head-up display mode change?

--

Go to Head Up Display (HUD) System Check

Go to Step 4

4

  1. Head-up display switch still connected.
  2. At the head-up display switch connector, jumper terminal 11 (LT Blue) to ground.

Does the head-up display image change each time the jumper is applied?

--

Go to Step 8

Go to Step 6

5

  1. Turn OFF the ignition switch.
  2. Reconnect or install any connectors or components that were disconnected or removed.
  3. Turn ON the ignition switch.
  4. Move the head-up display dimmer switch to the full bright position.
  5. Press and release the PAGE button to change the head-up display image.

Does the head-up display image change?

--

System OK

Go to Step 11

6

Check the head-up display switch harness and connector for an open or short between the head-up display switch and the IPC.

Was a problem found and repaired?

--

Go to Step 12

Go to Step 7

7

Check the head-up display unit harness pigtail and connector for an open or short between the head-up display unit and the IPC.

Was a problem found and repaired?

--

Go to Step 12

Go to Step 10

8

Check the head-up display switch harness and connector for an open or short between the head-up display switch and the IPC.

Was a problem found and repaired?

--

Go to Step 12

Go to Step 9

9

Replace the head-up display switch. Refer to Head Up Display Switch Replacement .

Is the replacement complete?

--

Go to Step 12

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10

Replace the head-up display unit. Refer to Instrument Cluster Head Up Display Replacement .

Is the replacement complete?

--

Go to Step 5

--

11

Replace the IPC assembly. Refer to Instrument Cluster Replacement .

Is the replacement complete?

--

Go to Step 12

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12

  1. Turn OFF the ignition switch.
  2. Reconnect or install any connectors or components that were disconnected or removed.
  3. Turn ON the ignition switch.

Is the repair complete?

--

Go to Head Up Display (HUD) System Check

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