GM Service Manual Online
For 1990-2009 cars only

PRNDL Display Inaccurate or Inoperative IP Mounted PRNDL Display

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 shifter in the following gears:
  5. • PARK
    • REVERSE
    • NEUTRAL
    • DRIVE
  6. Observe the IMS parameter in the powertrain control module (PCM) data display.

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

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Go to Step 3

Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 4.6L

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