You cant!
Lift up rear seat & replace battery
The rear seat should lift up, starting at the front.
To remove the front seats in a 2007 Buick LaCrosse, first disconnect the negative battery cable to prevent any electrical issues. Next, slide the seat forward to access the rear mounting bolts and remove them using a socket wrench. Then, slide the seat backward to access the front bolts and remove those as well. Carefully lift the seat out of the vehicle, ensuring to disconnect any electrical connectors for power seats or airbags if applicable.
To remove a seat belt in a Buick LaCrosse, first, ensure the vehicle is turned off and the seat belt is not in use. Locate the bolt that secures the seat belt buckle or anchor point, usually found on the floor or the side of the seat. Use a socket wrench to remove the bolt, and then gently pull the seat belt free from its anchor. If needed, consult the vehicle’s owner’s manual for specific instructions or safety precautions.
the battery is located underneath the rear seat ,remove rear seat by pulling upward on front of rear seat remove from car.next remove both + and- cables then completely remove bracket that holds battery.remove battery,andsame directions in reverse order
To remove the rear seat on a 2003 Buick Park Avenue, first, locate the two bolts securing the bottom cushion. These bolts are typically found at the front of the seat, under the cushion. Once the bolts are removed, lift the front of the seat cushion and pull it forward to detach it from the rear clips. For the seat back, look for bolts or clips at the base, remove them, and then tilt the seat back forward to remove it from the vehicle.
You need to do a lot if it is like my 1995. You need to remove the back seat remove the back of the back seat remove the screws holding the rear deck.. where the speakers are. then remove the screwss... what a pain.
Rear seat pulls up and out . Then there are 2 or 4 bolts that hold the back of the seat in place. you will have to also disconect the speaker wire .
first let the seat down, there are bolts on the side of the rear deck remove and deck lid should come up
In my 2000 LeSabre, it's under the back seat. Remove the rear seat and I'll bet it's there.
You have to remove the bottom rear seat cushion by pulling up and out at the same time, then remove rear seat back by removing 2 bolts that hold it to frame. Rear shelf can be removed to gain access to speakers.
To remove the seat in a 2006 Buick Lucerne, first, slide the seat all the way forward to access the rear bolts. Use a ratchet and socket to remove the two rear bolts, then slide the seat back to access the front bolts and remove them as well. After all bolts are removed, carefully lift the seat out of the vehicle, disconnecting any wiring harnesses if equipped with power features. Be sure to keep track of the bolts for reinstallation.