GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics

1

Did you perform the Lighting System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Turn ON the ignition switch, with the engine OFF.
  2. Place the headlamp switch in the OFF position.
  3. Ensure the parking brake is disengaged.

Does the DRL indicator illuminate?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Are the daytime running lights illuminated?

Go to Step 4

Go to Diagnostic System Check - Lighting Systems

4

Replace the instrument cluster (IPC). Refer to Instrument Cluster Replacement .

Did you complete the repair?

Go to Step 5

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5

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3