GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform 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

Did you perform the Instrument Cluster Diagnostic System Check?

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Go to Step 3

Go to Diagnostic System Check - Instrument Cluster

3

  1. Connect a scan tool.
  2. Turn the ignition switch to the RUN position.
  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. Read the input of the safety belt indicator.
  2. Connect and disconnect the seat belt.
  3. 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 of the vehicle doors.
  3. Fasten the driver's seat belt.
  4. Turn the ignition switch from the LOCK position to the RUN position.
  5. Listen to the chime.

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

--

Go to Step 6

Go to Diagnostic System Check - Instrument Cluster

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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Go to Diagnostic System Check - Instrument Cluster

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7

Replace the instrument panel cluster . Refer to Instrument Cluster Replacement .

Is the repair complete?

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Go to Diagnostic System Check - Instrument Cluster

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