Oldsmobile 1998 Aurora Owner's Manual page 284

Vehicle Storage
If you're not going to drive your vehicle for 25 days
or more, remove the black, negative
(-)
cable from
the battery. This will help keep your battery from
running down.
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).
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" in the Index
for tips on working around a battery without
getting hurt.
I
I
Contact your retailer to learn how to prepare your
vehicle for longer storage periods.
Also, for your audio system, see "Theft-Deterrent
Feature'' in the Index.
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