Fuse Box Diagram > Buick LeSabre (2000-2005) Fuse box diagram: Buick LeSabre (2000-2005) Cigar lighter / power outlet fuses in the Buick LeSabre are the fuse №65 in the Rear Underseat Fuse Box and fuses №22, 23 in the Engine compartment fuse box. Rear Underseat Fuse Box. It is located under the rear seat (remove the seat and open the fuse box Buick LeSabre (2000 - 2002) - fuse box diagram - Auto Genius Jan 22, 2017Buick LeSabre (2000 – 2002) – fuse box diagram. Year of production: 2000, 2001, 2002. Engine Compartment Fuse Block. The engine compartment fuse block is located near the front on the passenger’s side of the vehicle.