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?

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Go to Step 2

Go to Diagnostic System Check

2

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

    • U1016 - Loss of PCM Data
    • U1040 - Loss of EBTCM Data
    • U1064 - Loss of SBM Data
    • U1088 - Loss of SDM Data
    • U1255 - Loss of Generic Class 2 Data

Are any of these instrument cluster DTC set current?

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Go to Applicable DTC Diagnostic Table

Go to Head Up Display (HUD) System Check