2003 Cadillac DeVille DTS Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2003 Cadillac DeVille DTS
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2003 Cadillac DeVille DTS ProblemsOil Leak From Lower Engine Area
The engine may develop an oil leak from the lower crankcase portion of the engine block. Our technicians tell us that the engine must be removed from the vehicle to properly repair this oil leak.
The water pump and/or the plastic side tanks on the radiator may leak causing a loss of coolant. The engine may overheat due to coolant loss. Continued coolant loss after external leaks have been repaired could indicate a blown head gasket.
One or more heater & AC (HVAC) temperature and/or air delivery mode door actuator may fail, resulting in improper temperature or air delivery. If this occurs, fault code(s) should be stored in the HVAC control module which should assist in diagnoses.
2003 Cadillac DeVille DTS Questionswhy am I replacing motor mounts front and rear (3 answers)
twice in the last year
All the relays are good and none of the fuses are blown but yet I can start the car with a toggle switch that I installed at the relay