GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Audible Warning System Check performed?

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Go to Step 2

Go to Audible Warnings System Check

2

  1. Connect a Tech 2 scan tool to the data Link Connector (DLC).
  2. Use the Tech 2 scan tool in order to monitor the key in the switch input.
  3. Fasten and release the driver's seat belt while observing the Tech 2 scan tool.
  4. Close all of the vehicle doors.

Does the Tech 2 scan tool indicate the seat belt input is inactive with the driver's seat belt unfastened?

--

Go to Step 3

Go to Step 4

3

  1. Turn the ignition to the LOCK position.
  2. Ensure that the driver's seat belt is unfastened.
  3. Turn the ignition switch to the RUN position while performing the following steps:
  4. • Observing the fasten belts indicator
    • Listening to the chime

Did the fasten seat belt chime sound for 4-8 seconds and the indicator lamp turns on for 63-77 seconds?

--

Go to Step 7

Go to Step 8

4

  1. Ensure that the seat belt is unfastened.
  2. Use a test light in order to connect between B+ and the BCM connector C1 terminal C11 by backprobing.

Does the test light illuminate?

--

Go to Step 8

Go to Step 5

5

  1. Disconnect the driver's seat belt switch electrical connector.
  2. Use a test light in order to connect between B+ and the driver's seat belt switch harness connector B (male side of the connector).

Does the test light illuminate?

--

Go to Step 6

Go to Step 9

6

Use a DMM and measure the resistance between the driver's seat belt switch connector terminals A and B.

Is the resistance measured within the specified range?

2 ohms

Go to Step 10

Go to Step 11

7

A malfunction is not present at this time. Refer to Audible Warnings Circuit Description for more information.

Is the action complete?

--

Go to Step 12

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8

  1. Replace the BCM. Refer to Body Control Module Replacement in Body Control System.
  2. Perform the Setup New BCM procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Has the repair been made?

--

Go to Step 12

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9

Repair a poor connection or an open in circuit 750.

Has the repair been made?

--

Go to Step 12

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10

Repair a poor connection or an open circuit 238.

Has the repair been made?

--

Go to Step 12

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11

Replace the seat belt switch. Refer to Seat Belt Buckle Replacement - Left Front in Seat Belts.

Has the repair been made?

--

Go to Step 12

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12

  1. Turn the ignition to the LOCK position.
  2. Reconnect/reinstall the connectors/components removed.

Have all the repair s been made?

--

Go to Audible Warnings System Check

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