GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Lighting System Diagnostic System Check

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Turn ON the ignition, with the engine OFF.
  2. Install a scan tool.
  3. With a scan tool, observe the Left Turn Switch parameter in the IPC data list.

Does the left turn signal input indicate ON?

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Go to Turn Signal Lamps Always On - One Side

Go to Step 3

3

Replace the instrument panel cluster. Refer to Instrument Cluster Replacement .

Did you complete the replacement?

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System OK

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