GM Service Manual Online
For 1990-2009 cars only

Step

Action

Values

Yes

No

Schematic Reference: Instrument Cluster Schematics

1

  1. Connect a scan tool.
  2. Check for engine control diagnostic trouble codes (DTCs).

Is the vehicle speed sensor DTC set?

-

Go to Diagnostic Trouble Code (DTC) List - Vehicle

Go to Step 2

2

  1. Turn the ignition OFF.
  2. Disconnect the engine control module (ECM) connector.
  3. Remove the instrument cluster.
  4. Check continuity between ECM terminal 21 (51 ; Sirius D42) and the instrument cluster connector terminal A15.

Does the ohmmeter indicate the specified value?

0ohms

Go to Step 4

Go to Step 3

3

Repair the open circuit between the meter cluster connector terminal A15 and the ECM.

Is the repair complete?

-

System OK

-

4

Replace the speedometer.

Is the repair complete?

-

Go to Diagnostic System Check - Vehicle

-