GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check

2

  1. Turn the ignition to the RUN position.
  2. Leave the driver's seat belt unbuckled.

Does the fasten seat indicator illuminate and remain on?

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Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

  1. Disconnect the BCM connector C2 and connector C3.
  2. Connect a 15A fused jumper from BCM connector C3 terminal C4 to battery voltage. Refer to Circuit Testing in Wiring Systems.

Does the fasten seat belt indicator turn on?

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Go to Step 4

Go to Step 6

4

Test for and repair a poor connection at the BCM connector C3 terminal C4. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and repair a poor connection?

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Go to Step 11

Go to Step 5

5

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

Did you complete the replacement?

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Go to Step 11

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6

  1. Leave the 15A fused jumper connected.
  2. Connect a test lamp from instrument cluster connector terminal A13 to ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

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Go to Step 8

Go to Step 7

7

Repair the open in circuit 237 between the BCM and the instrument cluster. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 11

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8

Test for and repair an open in circuit 650 between the instrument cluster and S216. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and repair an open?

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Go to Step 11

Go to Step 9

9

Test for and repair a poor connection at the instrument cluster connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and repair a poor connection?

--

Go to Step 11

Go to Step 10

10

Replace the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.

Did you complete the replacement?

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Go to Step 11

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11

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 3