Slide bottom of bench seat back and upward to release clips (requires a lot of force)
Lift bench seat out
You will see bolts or clips holding the back of seat release/unbolt these and push stright up to release upper clips on back of seat to remove. 1999 Deville has two additonal bolts in the trunk that release the top of the seatback.
Use an axe
its under the back seat....
On a 79/80 Deville there are nuts under the seat that have to be loosened and be careful of the power seat wires and mechanisms under the Seat.
under the back seat
I have a 2000 Deville DTS. The battery is located below the back seat. Just pull up the seat (not back), and you will find the battery.
You don't!!!!!!! and if u do then your a monster!
unscrew the bolts and take the seat out
Two lug nuts on the rear seat in the trunk
To remove the front seats from a 1997 Cadillac DeVille, start by disconnecting the negative battery cable to prevent any electrical issues. Then, slide the seat all the way forward to access the rear bolts, and remove them using a socket wrench. Next, slide the seat back to access the front bolts and remove those as well. Finally, carefully lift the seat out of the vehicle, disconnecting any electrical connectors for the seat controls if necessary.
Its under the back bench seat on the passenger side.
The back seat should pop out and your battery and some fuse boxes are under your back seat.
Answerthe battery for the 2000 deville is usually behind the back seat*EDIT* To be more clear it is UNDERNEATH the back seat not behind it. Lift the portion that you actually sit on and you will find it.