GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 Sonoma Pickup - 2WD 🢒 Body and Accessories 🢒 Body Rear End 🢒 PRNDL Display Inaccurate or Inoperative

Step

Action

Value(s)

Yes

No

1

Was the IPC Diagnostic System Check performed?

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Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

2

The following symptoms are covered in the IPC Symptom Reference Table. Do not use this procedure in order to diagnose the following conditions:

    • PRNDL displays PARK but no other gears.
    • PRNDL displays all of the gear positions except PARK.
    • No gear is displayed on PRNDL.

Is the problem being diagnosed listed above?

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Go to Diagnostic System Check - Instrument Cluster

Go to Step 3

3

Use a scan tool in order to command the cluster to display each gear on the PRNDL display.

Does the cluster display the proper gear when commanded by the scan tool?

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Go to Step 4

Go to Step 6

4
  1. Turn the ignition switch to the RUN position.
  2. Move the gear selector through the range of gears while monitoring the PRNDL state with a scan tool.
  3. Compare the scan tool data to the PRNDL display on the cluster.
  4. Compare the transmission position read outs on the scan tool to the IPC PRNDL displays.

Does the PRNDL display agree with the scan tool data?

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Go to Step 5

Go to Step 6

5

Compare the scan tool data with the PRNDL display.

Does the scan tool data accurately indicate the position of the gear selector?

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Go to Diagnostic System Check - Instrument Cluster

Go to Symptoms in Engine Controls - 2.2L or Symptoms in Engine Controls 4.3L

6

Replace the IPC. Refer to Instrument Cluster Replacement .

Is the action complete?

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Go to Diagnostic System Check - Instrument Cluster

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