GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Instrument Cluster Diagnostic System Check performed?

--

Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

2

Inspect the system.

Are there any instrument cluster DTCs stored in memory?

--

Go to Diagnostic Trouble Code (DTC) List/Type

Go to Step 3

3

  1. Install a scan tool.
  2. Turn the ignition switch to the RUN position.
  3. Select the temperature gauge sweep test under the output control menu.

Does the tachometer gauge perform a full sweep when commanded?

--

Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 2.5L (LB8) and 3.0L (L46)

Go to Step 4

4

  1. Replace the instrument cluster. Refer to Instrument Cluster Replacement .
  2. Inspect the system.

Is the repair complete?

--

Go to Diagnostic System Check - Instrument Cluster

--