It's under the rear seat. Simply remove the rear seat by sticking your hands in the "biteline" (where the rear seat and seatback meet), and pull the seat up and out. The battery is tied down there with a battery brace. When replacing the rear seat, be sure that the two steel tabs on the front/bottom of the seat frame are in place before pushing the seat biteline back into place.
In my 2000 LeSabre, it's under the back seat. Remove the rear seat and I'll bet it's there.
The battery is located under the hood on a 2000 Chevrolet Lumina. The battery will be on the drivers side.
The battery for the Buick LeSabre (2000) is located under the rear seat cushion.
in the trunk
In the fuse box next to the battery
Under the battery Plate.
The engine computer is next to the battery.
That's on top of your battery.
If you have a V8, battery will be located in the trunk on right passenger side under platform.
The engine computer, next to the battery, is the ignition module.
Disconnect the car battery ... without an electrical impulse from any number of sensors, the air bag is rather unlikely to expand on its own.
next to battery on passenger side