GM Service Manual Online
For 1990-2009 cars only

Test Description

The number below refers to the step number on the diagnostic table.

  1. This test procedure may cause DTCs to set, which may cause other systems to be inoperative or disabled.

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. Raise the vehicles drive wheels. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Start the engine.
  4. Place the transmission into drive.
  5. With the scan tool, observe the Vehicle Speed Sensor (VSS) parameter in the engine control module (ECM)/powertrain control module (PCM) Engine Data 1 data list.

Does the VSS parameter match the speedometer display?

Go to Step 3

Go to Step 4

3

Does the odometer operate properly?

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

Go to Step 4

4

Replace the instrument panel cluster (IPC). Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 5

--

5

  1. Operate the system in order to verify the repair.
  2. Use the scan tool in order to clear the DTCs that may have set in other modules during diagnosis.

Did you correct the condition?

System OK

Go to Step 2