Acid may leak from the battery at the cable connections, resulting in corrosion on the battery cable ends and in the battery tray. A Leaking battery should be replaced and the cables thoroughly cleaned or replaced if necessary.
Car Problem Reports
Pontiac Grand Prix Corrosion on Battery Cable Ends
Pontiac Grand Prix Problem
Average Mileage: 170,500 mi (161,000 mi - 180,000 mi)
Visitor, 1995 Pontiac Grand Prix, 180,000 mi
cleaned cables and terminals but replaced the positive battery cable stud connector that hooks up to the fuse box. the but wouldnt come off and my boyfriend broke it trying to get the corrosion off