The remote can unlock but the lock doesn't work on my 2005 buick rendezvous

Question edited for clarity/
Question moved from MISC to model category.

Try flooding the lock with WD40.

If that doesn't work, call out a mobile auto locksmith, you need the fobs.

There is a linkage rod that connects the door key lock to the door lock. It is probably disconnected.

2006 Buick Rendezvous Remote Programming For Buick Rendezvous / Intrigue / AztekObtain all remote transmitters for this vehicle.
1. Close all doors.
2. Press and hold the Unlock button on door lock switch on drivers door.
Hold until instructed to release in step 6.
3. Insert key into the ignition cylinder but do not turn it.
4. Remove key from ignition and then insert key into ignition without turning ignition cylinder and remove key.
5. Insert key in ignition a third time and leave key in ignition. Do Not turn ignition.
6. Release door lock switch on drivers door panel. A Chime will sound 3 times indicating that you are in programming mode.
7. Press both the Lock and Unlock buttons on the remote up to 30 seconds.
A chime will sound 2 times if remote has programmed successful.
8. Repeat step 7 if you are programming additional remotes.
9. Remove key from ignition to exit programming mode

Check for broke wires inside the boot from body to driver door , this is a common problem . If you don't find broke wire's , pull the door panel to get at driver door switch . Check for voltage an ground circuit .
Rendezvous Door Lock System Components
The power door lock system consists of the following components:
?€¢
Body control module (BCM)

?€¢
Driver door lock switch

?€¢
Front passenger door lock switch

?€¢
Door lock actuators in each of the doors

?€¢
Door lock system fuse into the BCM (BCM D 25A fuse)

Door Lock Operation
When the BCM detects a transition of either of the door lock switches to the LOCK position, it switches the door lock actuator lock control circuit to voltage. Since the lock actuator unlock control circuits are at ground potential within the BCM, the door lock actuator motors transition to the Lock position.
Driver Door Unlock Operation
When the BCM detects a transition of either of the door lock switches to the UNLOCK position, it switches the driver door lock actuator unlock control circuit to voltage. Since the door lock actuator lock control circuit is at ground potential within the BCM, the LF door lock actuator motor transitions to the Unlock position.
The driver door lock actuator unlock control circuit is a dedicated control circuit used only for the driver door lock actuator motor. This is done so that the driver door may be unlocked by itself using a keyless entry transmitter or an automatic door unlock function (if programmed).
Passenger Door Unlock Operation
When the BCM detects a transition of either of the door lock switches to the UNLOCK position, it switches the door lock actuator unlock control circuits to voltage. Since the door lock actuator lock control circuit is at ground potential within the BCM, the passenger door lock actuator motors transition to the Unlock position.
The door lock actuator unlock control circuits are dedicated control circuits used only for the passenger door lock actuator motors. This is done so that the driver door may be unlocked seperate from the passenger doors using a keyless entry transmitter or an automatic door unlock function (if programmed). This video on testing computer controlled door locks on a Subaru , doesn't matter . test yours same way > The BCM controls your door locks .
Are all of the power door locks inoperative from both door lock switches?

Unlock usually takes 2 clicks to unlock other doors, if not you will need unlock relay

it is most likely that your door actuators are out,try hitting the unlock two times fast on ur
remote,if that doesnt work u can get after market ones installed in any car audio security
place,there way cheaper and last for many years you dont want the OG ones from dealer
cause that particular vehicle comes with defective actuators.

check for power to solenoid , repair wiring or replace solenoid (actuator)

I'm having the same problem with my 2006 Rendezvous, I can't unlock it with the Unlock button of the remote but the Liftgate button does work. The Unlock button used to unlock all the doors and the liftgate, now it only unlocks the doors.

Steve.

1. Close all doors.
2. Press and hold the Unlock button on door lock switch on drivers door.
Hold until instructed to release.
3. Insert and remove key from ignition 2 times. Do Not turn ignition.
4. Insert key in ignition a third time and leave key in ignition. Do Not turn ignition.

5. Release door lock switch on drivers door panel.
A Chime will sound 3 times indicating that you are in programming mode.
6. Press both the Lock and Unlock buttons on the remote up to 30 seconds.
A chime will sound 2 times if remote has programmed successful.
7. Repeat step 6 if you are programming additional remotes.
8. Remove key from ignition to exit programming mode.

1. Close all doors.
2. Press and hold the Unlock button on door lock switch on drivers door.
Hold until instructed to release.
3. Insert and remove key from ignition 2 times. Do Not turn ignition.
4. Insert key in ignition a third time and leave key in ignition. Do Not turn ignition.

5. Release door lock switch on drivers door panel.
A Chime will sound 3 times indicating that you are in programming mode.
6. Press both the Lock and Unlock buttons on the remote up to 30 seconds.
A chime will sound 2 times if remote has programmed successful.
7. Repeat step 6 if you are programming additional remotes.
8. Remove key from ignition to exit programming mode.