Here are a couple of diagnostic procedures that might help you locate the
problem:

Document ID# 415259
1999 Oldsmobile Bravada
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Power Door Locks System Check

Step
Action
Normal Result(s)
Abnormal Result(s)*

1
Close all vehicle doors.
Press the LF door lock switch to the LOCK position.
    All door lock actuators activate and lock all of the doors.
Press the LF door lock switch to the UNLOCK position.
    All door lock actuators activate and unlock all of the doors.

*Power Door Lock Inoperative - LF
*Power Door Locks Inoperative - All Doors and Switches
*Power Door Locks Inoperative - Side
*Power Door Locks - Lock Inoperative Unlock Operates
*Power Door Locks - Unlock Inoperative Lock Operates
*Power Door Locks Switch Inoperative - One
*Power Door Locks Switch Inoperative -Rear

2
Press the RF door lock switch to the LOCK position.
    All door lock actuators activate and lock all of the doors.
Press the RF door lock switch to the UNLOCK position.
    All door lock actuators activate and unlock all of the doors.

*Power Door Lock Inoperative - LF
*Power Door Locks Inoperative - All Doors and Switches
*Power Door Locks Inoperative - Side
*Power Door Locks - Lock Inoperative Unlock Operates
*Power Door Locks - Unlock Inoperative Lock Operates
*Power Door Locks Switch Inoperative - One
*Power Door Locks Switch Inoperative -Rear

3
Place the key in the ignition switch cylinder. Do not move the ignition
switch from the OFF position.
Open any one of the doors.
Press the power lock switch.
All of the doors will lock.
The driver's door will unlock.

*Power Door Locks Lockout Mode Inoperative

* Refer to the appropriate symptom diagnostic table for the applicable
abnormal result.
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Document ID# 499685
1999 Oldsmobile Bravada
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*Power Door Locks Lockout Mode Inoperative

Step
Action
Value(s)
Yes
No

DEFINITION: Use this diagnostic procedure in order to diagnose the
anti-lockout feature only if the other functions of the door lock system are
operating properly.

1
Did you perform the Power Door Locks System Check?
--
Go to Step 2
Go to Power Door Locks System Check

2
Insert the key in the ignition switch cylinder. Do not move the ignition
switch from the OFF position.
Open the driver's door.
Does the key-in ignition chime operate?
--
Go to Step 3
Go to Diagnostic System Check - Audible Warnings in Instrument Panel,
Gauges and Console

3
Replace the BCM.

Is the repair complete?
--
Go to Power Door Locks System Check
--

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  Document ID# 499685
1999 Oldsmobile Bravada