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1999 Cadillac Seville STS Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1999 Cadillac Seville STS

1999 Cadillac Seville STS Problems

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 anti-lock brake system (ABS) control module may fail causing the ABS light to illuminate. Failed modules should be replaced to restore ABS operation.

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1999 Cadillac Seville STS Questions

Both, the Battery and alternator have been tested professionally and both have been proven "good". What are we missing? Ideas as to what we should check next would be so helpful.

I changed the trans fluid pressure switch but still have the same problem.

I was told it has a compartment in the trunk to access it but I don't see one.

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1999 Cadillac Seville STS Reviews

after replacing an alternator the remote has stopped working; the car is unable to lock up and the gas tank is unable to open

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...

my car has 251,000 miles and is still going strong--put used struts & windshield in it in the last 3 years--5000 rpm at least once a week for a couple minutes to keep that northstar from useing oil works--use a quart every 3k---don't drive a northstar like a grandma and it will treat you right!---love this car---

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