GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the BCM diagnostic system check performed?

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Go to Step 2

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

2

Was the instrument cluster diagnostic system check performed?

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Go to Step 3

Go to Diagnostic System Check - Instrument Cluster

3

  1. Connect a scan tool.
  2. Key ON.
  3. WOW the instrument cluster ON.
  4. WOW the instrument cluster OFF.

Does the Safety belt indicator remain illuminated?

--

Go to Step 4

Go to Step 5

4

  1. Connect a scan tool.
  2. Key ON.
  3. Read the input of the saftey belt indicator.
  4. Connect and disconnect the seat belt.
  5. Observe the cluster seat belt indicator.

Does the seat belt lamp change states and turn off and on as the belt switch is connected and disconnected?

--

Go to Step 7

Go to Step 5

5

  1. Turn the ignition switch to LOCK.
  2. Close all vehicle doors.
  3. Fasten the driver's seat belt.
  4. Turn the ignition switch from the LOCK to the RUN position.
  5. Listen to the chime.

Does the BCM sound the fasten seat belt reminder sounds for 6 seconds?

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Go to Step 6

System OK

6

The fasten belts indicator lamp turns on with the driver's seat belt fastened due to a malfunction between the BCM and the driver's seat belt switch. Refer to Fasten Safety Belt Chime Always On for further diagnosis.

Is the action complete?

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System OK

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7

Replace the instrument panel cluster . Refer to Instrument Cluster Replacement

Is the action complete?

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System OK

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