2006 Cadillac DTS Owner's Manual - Page 338

The battery is located under the rear seat cushion. To access the battery, see Rear Underseat Fuse Block on page 5-96. You do not need to access the battery to jump start your vehicle. See Jump Starting on page 5-39. {CAUTION: A battery that is not properly vented can let sulfuric acid fumes into the area under the rear seat cushion. These fumes can damage your rear seat safety belt systems. You may not be able to see this damage, and the safety belts might not provide the protection needed in a crash. If a replacement battery is ever needed, it must be vented in the same manner as the original battery. Always make sure that the vent hose is properly reattached before reinstalling the seat cushion. To be sure the vent hose (A) is properly attached, the vent hose connectors (B) must be securely reattached to the vent outlets (C) on each side of the battery, and the vent assembly grommet (D) must be secured to the floor pan (E). 5-38