GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you peform the BCM Diagnostic System Check?

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Go to Step 2

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

2

  1. Disconnect the body control module (BCM) connector C2.
  2. Turn the ignition switch to the ON position.

Is the Security Indicator Lamp ON?

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Go to Step 3

Go to Step 4

3

Test the security indicator lamp control circuit for a short to ground. Refer to Testing for Short to Ground in Wiring Systems.

Did you find and correct the condition?

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Go to Step 5

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4

Inspect for poor connections at BCM connector C2. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Did you find and correct the condition?

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Go to Step 5

Go to Step 6

5

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

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6

Replace the BCM.

Did you complete the replacement?

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Go to Step 5

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