GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the DRL System Check?

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Go to Step 2

Go to Daytime Running Lights (DRL) System Check

2

Use the scan tool in order to read the body control module (BCM) current trouble codes.

Does the scan tool show any DTCs?

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Go to Diagnostic System Check - Body Control System in Body Control System

Go to Step 3

3

Remove the DRL relay from the underhood fuse block.

Do the daytime running lamps remain on?

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Go to Step 4

Go to Step 5

4

Locate and repair a short to ground in CKT 711 (DK GRN/WHT) between the left headlamp high beam bulb and the underhood fuse block.

Is the repair complete?

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Go to Daytime Running Lights (DRL) System Check

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5

Replace the DRL relay.

Is the repair complete?

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Go to Daytime Running Lights (DRL) System Check

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