Where is the battery located on the 2006 Cadillac DTS? Would you send us a diagram of where it is located and how to change it? Thanks, Judy

The battery is under the rear seat cushion, just give a sharp pull up on each side of the cushion and it sould come up. Take the key out of the ignition. Remove the vent tube connected to the battery. Using a 8mm wrench remove the black negative black cable from the battery. Then remove the red positive cable. On the rear back of the battery there is a13mm bolt to remove it you will need a 13mm socket a long extension and ratchet. remove the bolt then the plate under the bolt, move the vent tubes out of the way. Pull up on the battery and remove it. (the battery is big and heavy. Install new battery if cable ends are corroded clean with baking soda mixed with water or coke wrinse off good with water. Make sure you connect the red positive cable first. make sure cable bolts are TIGHT. Before starting turn ignition on for 10 seconds then off do this 3 times to reset the engine computer. this should do it.