GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Ignition Off.
  2. Disconnect the instrument cluster head-up display (HUD) dimmer switch.

  3. Turn the ignition ON.

Does the (HUD) turn off ?

--

Go to Step 3

Go to Step 2

2

  1. Repair the short to B+ in CKT 622
  2. Inspect the system.

Is the repair complete?

--

System OK

--

3

  1. Replace the instrument cluster head-up display (HUD) dimmer switch. Refer to Head Up Display Module Replacement
  2. Inspect the system.

Is the repair complete?

--

System OK

--