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

Does the instrument cluster speedometer operate properly?

--

Go to Step 3

Go to Head Up Display (HUD) System Check

3

Inspect for an open or short to ground in CKT 817 (DK GRN/WHT) from S255 to the HUD control module terminal 5.

Is the wiring OK?

--

Go to Head Up Display (HUD) System Check

Go to Step 4

4

Repair the open or short to ground in CKT 817 (DK GRN/WHT).

--

Go to Head Up Display (HUD) System Check

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5

Inspect for a loose or corroded terminal at the HUD control module connector terminal 8.

Is the connection OK?

--

Go to Head Up Display (HUD) System Check

Go to Step 6

6

Repair the poor terminal contact at the HUD control module connector terminal 8.

Is the repair complete?

--

Go to Head Up Display (HUD) System Check

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