GM Service Manual Online
For 1990-2009 cars only

Step

Action

Values

Yes

No

1

Did you perform the Instrument Cluster System Check?

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Go to Step 2

Go to Instrument Cluster System Check

2

  1. Install the scan tool.
  2. Select SPECIAL FUNCTIONS from the INSTRUMENT CLUSTER menu.
  3. Command the speedometer gauge from 140 mph to 0 mph and then back again.

Does the gauge needle respond when commanded?

--

Go to Step 3

Go to Step 4

3

Test for ABS DTC C0045.

Is a current DTC 0045 set?

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Go to A Diagnostic System Check - ABS

Go to Step 5

4

Replace the instrument cluster.

Is the replacement complete?

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Go to Instrument Cluster System Check

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5

Test the circuit between the Electronic Brake/Traction Control Module (EBTCM) terminal 23 and terminal 23 of the instrument cluster for an open or short to ground.

Did you find and repair a circuit problem?

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Go to Step 6

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6

  1. Connect all connectors and components that you previously removed.
  2. Test the speedometer.

Does the speedometer operate properly?

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System OK

Go to Step 2