GM Service Manual Online
For 1990-2009 cars only

HUD Image Height Adjustment Inoperative

Step

Action

Value(s)

Yes

No

DEFINITION: Head-up display image does not move UP or DOWN properly.

1

Were you sent here from the HUD Diagnostic System Check?

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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

Operate the head-up display image UP and DOWN by pressing the DISPLAY button.

Does the head-up display image move UP and DOWN properly?

--

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 9 (Gray) to ground.

Does the head-up display image move UP properly?

--

Go to Step 5

Go to Step 7

5

  1. Head-up display switch still connected.
  2. At the head-up display switch connector, jumper terminal 8 (Orange) to ground.

Does the head-up display image move DOWN properly?

--

Go to Step 9

Go to Step 7

6

  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. Operate the head-up display image UP and DOWN by pressing the DISPLAY button.

Does the head-up display image move UP and DOWN properly?

--

Go to Head Up Display (HUD) System Check

Go to Step 12

7

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 13

Go to Step 8

8

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 13

Go to Step 11

9

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 13

Go to Step 10

10

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

Is the replacement complete?

--

Go to Step 13

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11

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

Is the replacement complete?

--

Go to Step 6

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12

Replace the IPC assembly. Refer to Instrument Cluster Replacement .

Is the replacement complete?

--

Go to Step 13

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13

  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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