2005 buick lacrosse

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Question moved to model category.
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To deactivate disconnect the battery.
You can't deactivate / Bypass it. The system has two computers and a module stopping you trying what you are trying to do, drive the car without proper credentials. You have to fix it, not find away around it.

Resetting the system

1-Turn ON the ignition, with the engine OFF. 2-Attempt to start the engine, then release the key to ON (vehicle will not start). 3-Observe the SECURITY telltale(this is the security light), after approximately 10 minutes the telltale will turn OFF. 4-Turn OFF the ignition, and wait 5 seconds .
Feb 11, 2018
Theft deterrent is on and my 2005 buick lacrosse will not..

https://www.youtube.com/watch?v=74AGNqY7Mm8

PWR WDO - 30amp circuit breaker , DRV -MDL 10amp fuse - both are located in the rear fuse box .
Fuse Block Rear
Under the left side of the rear passenger compartment seat

Door Lock Mechanism Sticks : Buick LaCrosse Common ...

repairpal.com > Problems > Buick > LaCrosse
Door lock mechanism not operating properly on Buick LaCrosse. Door lockmechanisms ... problem details. 2005 Buick LaCrosse126,000Visitor .... door panel to repair? Lock will neither lock or unlock using key fob but does work manually.

My friend just had this problem and he reached in and pulled the inside door handle back as far as it would go, and then let it go, allowing it to 'snap' back. For some reason this fixed it. We have no idea why. By doing this on one door, both rear door locks freed up and the rear locks are now working. Before, both rear locks were stuck and you could not open the doors from the inside nor the outside. Not sure why it works, but maybe it will work for you!

I have a 2002 Lesabre but suspect it is in the same vicinity. Look under the car, drivers side under the passenger door towards the middle of the car.

Looks like the lock itself has a problem in this that's why it wont open or there's something that makes the door stuck even though you lock/unlock it, It's best to replace the side door lock immediately. or better check if there's any elements that are inside the side door that makes the door jammed.

the wires in the trunk lid are broken. this model has poorly designed electrical. there is a wire bundle on the right hand side of the trunk lid open the bundle up and resplice the 4 wires. this will correct the doors and remote trunk opener.

There may be a vertical switch on the drives door to control the locks. Hold down the upmost position of the switch for 5 seconds. This trigers the trunk to open.
Good luck.

Use this Procedure for Buick Vehicles "With" Driver Information Center Buttons.

This information is in your "Owners Manual" in the "Drivers Information Center Section."

1. Insert Key and turn to ON position so you can access Driver Information Center.

2. Press the vehicle information button until PRESS TO RELEARN REMOTE KEY displays.

3. Press the set/reset button until REMOTE KEY LEARNING ACTIVE displays.

4. Press and hold the lock and unlock buttons on the key-less remote at the same
time for approximately 15 seconds. A chime will sound indicating that the remote is
programmed.

5. To program additional remotes at this time repeat step 4. This vehicle can have a maximum of eight remotes programmed.

6. To exit programming mode turn key off and remove key. Test remote(s).


Use this Procedure for Buick Vehicles "Without" Drivers Information Center Buttons.

To access this display, the vehicle must be in Park (P) with key in the on position (as far as you can go without cranking engine).

1. Press the trip odometer reset stem until RELEARN REMOTE KEY displays.

2. Press and hold the trip odometer reset stem for three seconds. The message REMOTE KEY LEARNING ACTIVE will display

3. Press and hold the lock and unlock buttons on the first key-less remote at the same
time for approximately 15 seconds. A chime will sound indicating that the remote is
programmed.

4. To program additional remotes at this time repeat step 3. This vehicle can have a maximum of eight remotes programmed.

5. To exit programming mode turn key off and remove key. Test remote(s).

Good Luck !

use a wedge to wedge the door open a lital bit on top and use a strait peice of metal that can bend fairly easy to go down inside of the car and hit the unlock button. or call a tow truck company and they will come out to help for $40 or $50