GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the PCM On-Board Diagnostic System Check (OBD) performed?

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Go to Step 2

Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 3.5L

2

Was the Instrument Cluster Diagnostic System Check performed?

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Go to Step 3

Go to Diagnostic System Check - Instrument Cluster

3

  1. Turn the ignition switch to the off position.
  2. Install scan tool to the data link connector (DLC).
  3. Turn the ignition switch to the on position.
  4. Using the scan tool, establish communication with the instrument cluster.
  5. On the scan tool, select special functions under the main menu.
  6. On the scan tool, select output control under the special functions main menu.
  7. On the scan tool, select temperature gauge sweep test under the output control main menu.

Does the temperature gauge perform a full sweep when commanded to do so?

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Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 3.5L

Go to Step 4

4

Replace the instrument cluster.

Refer to Instrument Cluster Replacement .

Is the repair complete?

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Go to Diagnostic System Check - Instrument Cluster

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