GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Instrument Cluster Schematics

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

  1. Install a scan tool.
  2. Start the engine.
  3. With the scan tool, observe the Engine Speed parameter in the powertrain control module (PCM) Engine Data 1 List.

Does the Engine Speed parameter match the tachometer display?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Replace the instrument panel cluster (IPC). Refer to Instrument Cluster Replacement .

Did you complete the replacement?

Go to Step 4

--

4

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2