2009 Cadillac DTS Owner's Manual - Page 340

Battery This vehicle has a maintenance free battery. When it is time for a new battery, see your dealer/retailer for one that has the replacement number shown on the original battery's label. Warning: Battery posts, terminals, and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer and reproductive harm. Wash hands after handling. The battery is located under the rear seat cushion. To access the battery, see Rear Underseat Fuse Block on page 5-98. Access to the battery is not necessary to jump start the vehicle. See Jump Starting on page 5-38. { 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 the rear seat safety belt systems. You might 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. 5-36