GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

The courtesy lights do not turn on for 40 seconds when unlocking doors using the keyless entry transmitter.

1

Was the Interior Lights System Check performed?

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Go to Step 2

Refer to Interior Lamps System Check

2

Did you perform the BCM Diagnostic System Check?

--

Go to Step 3

Refer to Diagnostic System Check - Body Control System

3

  1. Lower the driver's window in order to prevent lockout.
  2. Close and lock all the vehicle doors.
  3. Turn the ignition switch from LOCK to RUN, then back to LOCK.
  4. Observe the courtesy lights and door locks and press unlock on the keyless entry transmitter.

Do the door locks unlock upon pressing unlock on the keyless entry transmitter?

--

Go to Step 4

Refer to Remote Keyless Entry System Check

4

Do the courtesy lights turn on for 40 seconds upon pressing unlock on the keyless entry transmitter?

--

System OK

Go to Step 5

5

  1. Replace the BCM. Refer to Body Control Module Replacement in Body Control System.
  2. After BCM replacement, refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Has the repair been made?

--

Refer to Interior Lamps System Check

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