How do you change 2000 Buick LeSabre license plate bulb?

1. Disconnect the tail/back up lamp harness connector from the from the body wiring harness.
2. Remove the tail/back up lamp assembly from the rear compartment lid.
3. While supporting the tail/back up lamp assembly, unplug the tail/back up lamp harness grommet from the rear compartment lid and remove the tail/back up lamp from the vehicle.
4. Remove the license plate lamp bulb from the lamp housing.

You can see in the video bellow
The bulb can be found on ebay/Amazon or according to me Aliexpress Homepage
It's the biggest and cheapest worldwide suplier.
Just type the correct name into the searchbox and
thats it
wish you luck

Best replacement bulbs with greatest prices can be found on http://alibaba-homepage.com/. I hope I helped
Peter

Vehicles: 2004 Buick LeSabre 3.8L SFI OHV 6-cylinder

From sylvania.com:
License plate light bulbs - 2 compatible tag light bulb types:
(1) 161
(2) 161LL (LL stands for "Long Life")
SYLVANIA Long Life miniature bulbs perform twice as long as any standard miniature bulb. Designed for durability, lower maintenance and greater safety.

These are available online, and also at every auto parts store:
http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_Long-Life-Incandescent-Mini-Bulb-Sylvania_5080167-P_1259_R'GRPLAMPAMS___

Since no maintenance manual covers this, do what mechanics do when maintenance manuals fail - get creative.

Unscrew or pry off the lens cover, pull out the License Plate's Type 161 bulb, and insert a new 161 or 161LL bulb, and replace the cover.

Test your installation by turning the ignition key to the "Accessory" position, which will turn on the running lights and the license plate light.

Hi. Remove the retaining screws from the license plate light assembly with a Phillips screwdriver. There are two screws on each side of the lens assembly.

Pull the light assembly cover down out of the way to gain access to the bulbs. Twist the bulb socket counterclockwise to remove it from the assembly and pull it straight out. Pull the bulb out of the socket.

Push the new bulb straight into the socket. Replace the bulb and socket inside the light assembly and turn it clockwise to secure it.

Replace the assembly cover and secure it with the retaining screws. Tighten the screws with a Phillips screwdriver. Turn on the lights to test your new bulbs.
Take care

mcdevito75 here, Just above the license plate in the bumper you should see the light lens, simply remove the 2 screws and change the bulb/bulbs

I have a 2002 which is a little different body style but it may be the same process. You have to take the back plastic section that holds the license plate loose from the car. There are bolts that are inside the trunk that hold the plastic panel on. Mine are in the trunk lid. If your plastic panel, license plate, etc. goes up with the trunk lid they are in the lid. You need deep type sockets to reach the nuts, at least mine does.

kind of tricky, took me an hour to get it figured out, but you got to opend the trunk and take out the 10 or so 10mm nuts sticking out of the backside of the lid, then the whole solid piece where the lights are on the back will slide off, then you can change the bulbs above the license plate and put it all back together

kind of tricky, took me an hour to get it figured out, but you got to open the trunk and take out the 10 or so 10mm nuts sticking out of the backside of the lid, then the whole solid piece where the lights are on the back will slide off, then you can change the bulbs above the license plate and put it all back together, im cant remember off hand the bulb size, but your local auto parts store will have that info when you go to buy them

My park avenue has star bit screws on both sides of the plate lights right at the top of the license plate holder. I just chaged them last week. I do not know what size the bit was and I am not sure your car is the same. My car looks just like the car in the picture just longer and a little bigger.