GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Instrument Cluster Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

2

  1. Turn OFF the ignition.
  2. Install a scan tool.
  3. Start the engine.
  4. Place the gear shift lever in the following gears:
  5. • PARK
    • REVERSE
    • NEUTRAL
    • DRIVE
  6. Observe the Transmission Range parameter in the powertrain control module (PCM) data display.

Does the scan tool indicate that the Transmission Range parameter is the same as the PRNDL display for all gears?

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Go to Powertrain On Board Diagnostic (OBD) System Check Engine Controls - 3.8L

Go to Step 3

3

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Did you complete the replacement?

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Go to Step 4

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4

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2