GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check - Theft Deterrent?

Go to Step 2

Go to Diagnostic System Check - Theft Deterrent

2

Did you perform the Diagnostic System Check - Body Control System?

Go to Step 3

Go to Diagnostic System Check - Body Control System

3

Verify the lighting system for proper operation. Refer to Lighting System Operation in Lighting Systems.

Is the lighting system OK?

Go to Step 4

Go to Diagnostic System Check - Lighting Systems in Lighting Systems

4

Verify the horn system for proper operation. Refer to Horns Operation in Horns.

Is the horn system OK?

Go to Step 5

Go to Diagnostic Starting Point in Horns

5

Verify the content theft system for proper operation. Refer to Content Theft Deterrent (CTD) Operation .

Is the content theft deterrent system OK?

System OK

Go to Step 6

6

Important: Perform the set up procedure after you replace the BCM. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System and Programming Replacement Lock Cylinder, Body Control Module or Powertrain Control Module .

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

Did you complete the replacement?

Go to Step 7

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7

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3