1994 Cadillac Seville Owner's Manual - Page 238

If the coolant inside the coolant surge tank is boiling, don't anything do else until it cools down. r The coolant level should be visible insidethe surge tank. If it isn't and the "ENGINE COOLANT LOW" message appears on the Driver Information Center, you may have a coolant leak somewhere in the cooling system.Should a low coolant condition exist, an overheat protection "LIMP HOME" feature which alternates firing groupsof four cylinders for a predetermined number of cycles to prevent engine damage, enabling your vehicleto bedriven to thenearest service center.