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.Google+
Car Problem Reports
Chevrolet Monte Carlo Corrosion on Battery Cable Ends
Chevrolet Monte Carlo Problem
Visitor, 2002 Chevrolet Monte Carlo
I have had this problem twice. Without warning the car won't start. It was towed to the garage and I am told the cables and battery has corrosion so bad the cable has broken off. When I have the car serviced apparently this area is never checked.