GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the seat belt operation and perform the necessary inspections?

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Go to Step 2

Go to Diagnostic Starting Point

2

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Fasten the LH front seat belt.
  4. With a scan tool, observe the fasten seat belts parameter in the instrument panel data list.

Does the scan tool display that the seat belt is buckled?

--

Go to Step 7

Go to Step 3

3

  1. Disconnect the seat belt buckle switch.
  2. With the scan tool, observe the fasten seat belts parameter.

Does the seat belt parameter change state?

--

Go to Step 4

Go to Step 5

4

Replace the seat belt buckle switch. Refer to Front Seat Belt Buckle Replacement .

Did you complete the replacement?

--

Go to Step 8

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5

Test the signal circuit of the seat belt switch for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 8

Go to Step 6

6

Replace the body control module (BCM).

Refer to Body Control Module Replacement in Body Control Systems.

Did you complete the replacement?

--

Go to Step 8

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7

Replace the instrument panel cluster.

Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.

Did you complete the replacement?

--

Go to Step 8

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8

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2