One problem related to crankcase (pcv) has been reported for the 2003 Cadillac Deville. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Cadillac Deville based on all problems reported for the 2003 Deville.
2003 Cadillac Deville. Consumer writes in regards to several mechanical defect issues. Consumer sent additional correspondence. The consumer stated the water pump and radiator leaked resulting in a coolant leak, and the engine overheating. An independent mechanic determined the metal brackets holding the left side tank had rusted and caused a crack in the left radiator tank. The engine developed an oil leak from the lower crankcase of the engine block. The oil leak caused a defective design in the lower crank shaft. The mechanic informed the consumer the engine needed to be removed to properly repair the oil leak. Also, the tire pressure light illuminated.