The maintenance-free battery is located in the trunk, behind the rear seat, on the driver's side of the vehicle.
See "Battery" in the Index of your DeVille owner manual for additional information on battery replacement and vehicle storage.
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 . Access to the battery is not necessary to jump start the vehicle. See Jump Starting .
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.
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).
Vehicle Storage
Caution: Batteries have acid that can burn you and gas that can explode. You can be badly hurt if you are not careful. See Jump Starting for tips on working around a battery without getting hurt.
Infrequent Usage: If the vehicle is driven infrequently, remove the black, negative (-) cable from the battery. This helps keep the battery from running down.
Extended Storage: For extended storage of the vehicle, remove the black, negative (-) cable from the battery or use a battery trickle charger. This helps maintain the charge of the battery over an extended period of time.
