2009 Buick Lucerne Owner's Manual - Page 327

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 "Removing the Rear Seat Cushion" under Rear Underseat Fuse Block on page 5-101. Access to the battery is not necessary to jump start the vehicle. See Jump Starting on page 5-44. CAUTION: (Continued) 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. { 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 CAUTION: (Continued) 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). 5-43