GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the HUD system check?

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Go to Step 2

Go to Head Up Display (HUD) System Check

2

  1. Disconnect the HUD control module connector.
  2. Turn the park lights ON.
  3. Measure the voltage from the HUD control module connector terminal A to ground.

Does the voltage match the specified value?

10-15 V

Go to Step 4

Go to Step 3

3

Repair the open in CKT 32 (YEL).

Is the repair complete?

--

Go to Head Up Display (HUD) System Check

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4

Inspect the HUD control module connector terminal 2 for poor contact.

Is the connection OK?

--

Go to Step 3

Go to Step 3

5

Repair the poor connection.

Is the repair complete?

--

Go to Head Up Display (HUD) System Check

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6

Replace the HUD control module.

Is the replacement complete?

--

Go to Head Up Display (HUD) System Check

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