GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Unbuckle the driver's seat belt.
  2. Disconnect the Body Control Module (BCM) connector C2 and connector C3.
  3. Connect a test lamp between the BCM connector C2 terminal B and connector C3 terminal C13.

Does the test lamp light?

--

Go to Step 2

Go to Step 3

2

  1. Test for a poor connection at terminal C13.
  2. If OK, replace the BCM. Refer to Body Control Module Replacement .

Is the repair complete?

--

System OK

--

3

  1. Disconnect the seat belt switch.
  2. Connect a test lamp from the BCM connector C2 terminal B to the seat belt switch connector terminal A.

Does the test lamp light?

--

Go to Step 4

Go to Step 5

4

Repair the open in circuit 238, between the seat belt switch and the BCM.

Is the repair complete?

--

System OK

--

5

Connect a test lamp from the BCM connector C2 terminal B to the seat belt switch connector terminal B.

Does the test lamp light?

--

Go to Step 7

Go to Step 6

6

Repair the open in circuit 650 from the seat belt switch to S217.

Is the repair complete?

--

System OK

--

7

  1. Test the seat belt switch for a poor connection.
  2. If OK, replace the seat belt switch.

Is the repair complete?

--

System OK

--