2003 Cadillac Seville STS Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2003 Cadillac Seville STS
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2003 Cadillac Seville STS ProblemsImproper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator
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.
The trunk pull down switch may fail causing the trunk lid not to close completely. Our technicians tell us that the failed switch can be replaced without changing the complete pull down motor assembly.
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.
2003 Cadillac Seville STS QuestionsHeater blows cold, actuators working and cabin filter clear. What next? (1 answer)
I have a 2003 Cadillac STS. A/C works fine however, heat blows cold. Using a simple temperature test I have verified coolant appears to be flowing through heater core, not 100% certain but trouble isn’t leading me that way. I have checked all the actuators I can find, one on left and right side o...
Im getting camshaft codes and misfire codes I already replaced one sensor how can I find out what else is causing the misfire