GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Instrument Cluster Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

2

  1. Turn the ignition switch to RUN.
  2. Connect the scan tool.
  3. Select instrument cluster Data Menu.

Is the speedometer displayed on the scan tool the same as the indicate vehicle speed on the gauge?

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Go to Powertrain On Board Diagnostic (OBD) System Check

Go to Step 3

3

Inspect CKT 817 for an open.

Is the circuit open?

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Go to Step 4

Go to Step 5

4

Repair the open in CKT 817.

Did you complete the repair?

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Go to Diagnostic System Check - Instrument Cluster

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5

Replace the instrument cluster.

Did you complete the repair?

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Go to Diagnostic System Check - Instrument Cluster

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