GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

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

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Go to Step 2

Go to Powertrain On Board Diagnostic (OBD) System Check (V6 VIN K) or Powertrain On Board Diagnostic (OBD) System Check (V8 VIN G)

2

  1. Connect a scan tool to the vehicle data link connector (DLC).
  2. Using the scan tool, attempt to perform the engine coolant temperature gage sweep test.

Does the engine coolant temperature gage sweep from cold to hot and return to cold?

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Go to Powertrain On Board Diagnostic (OBD) System Check (V6 VIN K) or Powertrain On Board Diagnostic (OBD) System Check (V8 VIN G)

Go to Step 3

3

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Is the repair complete?

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System OK

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