Cadillac Seville STS Repair and Maintenance

A guide to problems, costs, maintenance and repair for your Cadillac Seville STS

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Cadillac Seville STS Problems

Improper 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.

Trunk Lid Won't Close Due to Trunk Pull Down Switch Failure

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.

Car Won't Start and Security Light is On

Problems with anti-theft systems using the raised-chip key can prevent the car from starting. The wires in the steering column to the ignition lock cylinder tend to break. The key and ignition lock cylinder should be replaced to correct this condition.

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Cadillac Seville STS Questions

Heater 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...

Idles fine. Give it gas it backfires misses stumbles (1 answer)

When it backfires misses and stumbles it will overheat. Today it did this but now doesn't want to start. What would be problem

Just replaced radiator still over heats doing hwy speed (2 answers)

1996 Cadillac sts. Just replaced the radiator, and thermostat. When we do hwy speed 100km or more engine says hot. There r no leaks any where., all the belts r working. No clue what could be wrong. Any ideas....?

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Cadillac Seville STS Reviews

I am an 18 year old kid and bought this as my first car. That being said, I don't expect it to last me that long cause when something goes wrong it is very expensive to fix it.when that day comes I'll have to part it out:(
Purchased in 1999, original owner, I only drive it occasionally and have around 71k miles on it now. Only 1 major issue with the vehicle - a nagging vibration at 65mph caused by either axle or something in the suspension up front. Original tires, and replacement tires as well as rims have been high speed road force balanced twice but vibration continues. Replacing the axle will be next, somet...
Love the smooth engine and the thrill of power, drives great. 142000 miles I do have an oil leak and 3rd light is half out tail lights get condensation in them. Center console cup holder is broken will not stay stored. Car still looks great and still has a great shine.

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