GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Automatic Door Lock System Check performed?

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Go to Step 2

Go to Automatic Door Locks System Check

2

Was the BCM Diagnostic System Check performed?

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Go to Step 3

Go to Diagnostic System Check - Body Control System in Body Control System

3

  1. Use a test light in order to backprobe between B+ and the inoperative door lock switch connector terminal A.
  2. Press the inoperative door lock switch to the LOCK position.

Does the test light illuminate?

--

Go to Step 4

Go to Step 5

4

Repair the poor connection or the open in circuit 195.

Is the repair complete?

--

Go to Step 6

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5

Replace the door lock switch.

Is the repair complete?

--

Go to Step 6

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6

  1. Turn the ignition switch to the OFF position.
  2. Connect the connectors.
  3. Install any components that you removed.
  4. Turn the ignition switch to the RUN position for 6 seconds.
  5. Turn the ignition switch to the OFF position.
  6. Remove the MALL PGM fuse.
  7. Turn the ignition switch to the ACC position.
  8. The BCM sounds the chime. The chime sounds a number of times that is equivalent to the BCM type that is installed on the vehicle.

  9. Within one second, turn the ignition switch from the ACC position to the OFF position and back the ACC position. The BCM sounds any DTCs that are stored.

Are any BCM DTCs present?

--

Go to Diagnostic System Check - Body Control System in Body Control System

Go to Automatic Door Locks System Check