GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Did you perform the Door Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Door Systems

2

Verify that the automatic door locks feature is enabled. Refer to Vehicle Personalization in Personalization.

Are the automatic door locks enabled?

Go to Step 3

Go to Vehicle Personalization in Personalization

3

Verify that the automatic door locks inoperative fault is present.

Does the automatic door locks system operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 4

4

Verify that the power door locks system operates correctly.

Does the power door locks system operate correctly?

Go to Step 5

Go to Symptoms - Doors

5

  1. Turn OFF the ignition.
  2. Disconnect the driver door lock C1 harness connector.
  3. Attempt to operate the automatic door locks system.

Does the automatic door locks system operate normally?

Go to Step 7

Go to Step 6

6

Test the left front door ajar switch signal circuit of the driver door lock C1 harness connector for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 8

7

Inspect for poor connections at the harness connectors of the driver door lock. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 9

8

Inspect for poor connections at the harness connector of the body control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 10

9

Replace the driver door lock. Refer to Front Side Door Lock Replacement .

Did you complete the replacement?

Go to Step 11

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10

Replace the body control module. Refer to Body Control Module Replacement in Body Control System.

Did you complete the repair?

Go to Step 11

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11

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2