GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Connect a scan tool.
  2. Test for instrument cluster DTCs.

Does the scan tool display any instrument cluster DTCs?

--

Go to Step 2

Go to Instrument Cluster System Check

2

The following is a list of the possible instrument cluster DTC:

Are any of these instrument cluster DTC set current?

--

Go to Applicable DTC Diagnostic Table

Go to Head Up Display (HUD) System Check