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.
Resources for the Repair and Maintenance of your Cadillac Seville STS
Cadillac Seville STS Models:
Cadillac Seville STS Problems
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.
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.
The parking brake may not release automatically due to a failed vacuum switch or actuator. Our technicians tell us that if vacuum is supplied to the actuator when the transmission is in gear, the vacuum switch is functioning and replacing the actuator should correct this concern.
Cadillac Seville STS Questions and Answers
hello,my windows dont roll down do you's got any idea why?and it keeps making a poppin noise from the muffler any way i could fix it at home?
any idea of why it would just die out but it will start right back up.And you wouldnt know how much it would be worth..
my low beam head lights don't work but the highbeam lights do. Also my tail lights do work but the don't light up brighter when I press the brake. How do I fix this?
Only one half of my LED brake light (the long led strip on the trunk) works. How do I fix this?
Cadillac Seville STS Reviews
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, something I can do in the driveway. My Northstar burns oil, always has, like a big block truck motor it uses about a quart for every 2500 miles. Holding my breath for the notorious head gasket failure. If that happens, I'm off to buy another brand this time around.
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.
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---
when I brake pedal and the car is hard not to
Bought my '95 in 2010 in Cheyenne, WY, I sold new Cadillacs in 1995, that is why I had to have this car. 167,000mls, drove very well, engine needed some help, so I gave it to the Cheyenne cadillac service shop and they did $6500 work to it, purged exhaust manifold, new rotors, brakes, front struts, 5 new tires, 5th rim, new speakers, new plugs/wires, 4 new wndw motors, later bought new front bumper facia, self instl-hard! :( needs painting now.....the frnt psngr wndw motor hung up, caused door to malfuntion then wndw failed.....broke down door, can see alignment arm but not where it goes.....rats!