2003 Buick LeSabre Owner's Manual - Page 295

Vehicle Storage If you're not going to drive you vehicle for 25 days or more, remove the black, negative (-) cable from the battery. This will help keep your battery from running down. Batteries have acid that can burn you and gas that can explode. You can be badly hurt if you aren't careful. See "Jump Starting" next for tips on working around a battery without getting hurt. 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). Contact your dealer to learn how to prepare your vehicle for longer storage periods. Also, for your audio system, see Theft-Deterrent Feature on page 3-82. 5-44