GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Head Up Display (HUD) System Check?

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Go to Step 2

Go to Head Up Display (HUD) System Check

2

  1. Turn the ignition switch to the RUN position.
  2. Press the ENG/MET switch on the instrument panel cluster (IPC) (causing the MPH/km/h indicator to change).

Does the units (MPH or km/h) indicator on the instrument cluster speedometer change?

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Go to Step 3

Go to Diagnostic System Check - Instrument Cluster

3

Press the ENG/MET switch on the IPC (causing the units indicator to change).

Did the units (MPH or km/h) indicator change on the HUD display?

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Go to Diagnostic System Check - Instrument Cluster

Go to Step 4

4

Does the HUD unit display only ENG (MPH) units?

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Go to Step 5

Go to Step 6

5

Test CKT 1450 (BLK) for high resistance or an open between terminal 7 of the HUD control module and G201.

Is the wiring OK?

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Go to Step 6

Go to Step 7

6

Replace the Head Up Display Module Replacement .

Did you complete the repair?

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Go to Head Up Display (HUD) System Check

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7

Repair the open or high resistance in CKT 1450 (BLK) between terminal 7 of the HUD control module and G201.

Did you complete the repair?

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Go to Head Up Display (HUD) System Check

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