GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Headlight System Check?

--

Go to Step 2

Go to Headlight System Check

2

  1. Ensure that the park brake is applied.
  2. Turn the ignition switch to the RUN position.

Does the BRAKE indicator light?

--

Go to Step 3

Go to Step 4

3

  1. Turn the ignition switch to the LOCK position.
  2. Disconnect the DRL module connector.
  3. Connect a test lamp from the DRL module connector, cavity A, to B+.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

4

Refer to Park Brake System Check .

Did you find and correct a condition?

--

Go to Headlight System Check

--

5

Replace the DRL module. Refer to Daytime Running Lights (DRL) Control Module Replacement .

Is the repair complete?

--

Go to Headlight System Check

--

6

Repair the open in CKT 1134 (LT BLU) between the park brake switch and the DRL module.

Is the repair complete?

--

Go to Headlight System Check

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