GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Schematic Reference: Audible Warnings Schematics

1

Did you perform the Audible Warnings Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Audible Warnings

2

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, perform the Chime Test in the BCM.

Does the chime sound?

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Go to Step 3

Go to Step 10

3

  1. Turn OFF the ignition.
  2. Open the driver's door.

Do the courtesy lamps illuminate when the driver's door is opened?

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Go to Step 4

Go to Courtesy Lamps Inoperative in Lighting Systems

4

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Turn the headlamp switch to park.
  4. With a scan tool, observe the LCM Lights On Chime parameter in the BCM Inputs data list.

Does the LCM Lights On Chime parameter display On?

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

Go to Step 5

5

  1. Turn OFF the ignition.
  2. Disconnect the BCM connector C3.
  3. Connect a test lamp between the exterior lamp off signal circuit and a good ground.
  4. Turn the headlamp switch to park.

Does the test lamp illuminate?

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Go to Step 6

Go to Step 8

6

Test the exterior lamps off input circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 11

Go to Step 7

7

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

Did you find and correct the condition?

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Go to Step 11

Go to Step 9

8

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

Did you find and correct the condition?

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Go to Step 11

Go to Step 10

9

Replace the headlamp switch. Refer to Headlamp Switch Replacement in Lighting Systems.

Did you complete the replacement?

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Go to Step 11

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10

Important: Program the replacement BCM.

Replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

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Go to Step 11

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11

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2