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 1998 Cadillac Seville STS
1998 Cadillac Seville STS
1998 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.
1998 Cadillac Seville STS Questions and Answers
My STS ( 180000 miles) is overheating in traffic after driving on the highway with AC on high. At highway speeds, temperature gauge stays vertical. Once in town, the temperature rises slowly unti...
My 98' Seville STS(155020) displays "service stability system" and "service steering system" on the message bar, among several other messages. I'm not experiencing an...
I NEED A DIOGRAM ON HOW TO DROP A FUEL PUMP?
Serveice Electrical light comes on. RPM, blinkers, and Information center will not work, everything lights up, no bulbs are, if i get a new computer will it still come up, cant find out the code un...
1998 Cadillac Seville STS Reviews
Beautiful to behold. Always silky smooth to drive.
Fifth generation Seville touts a K style Oldsmobile Aurora body, the structure much stiffer with front-drive drivetrain featuring the muscle Northstar V8 and 4T80-E four-speed automatic (which is probably its worst component)
I miss the wreath crest, but otherwise, the lines are striking and the crimson red exterior and cream leather interior are eye catching.
Paid too much - the dealer wore a starched white shirt and cuff links in a Italian suit and proclaims he's just a country boy. KBB says it's worth $5K but you couldn't match the luxury feel and the dependability for that.
dude this car is forever is the best!!!
lol ya mine 98 is on its way got to replace whole front suspension cuz 20in rims and hittin them bums to hard
Overall, it's a good vehicle. But it's easy to see why the value of this vehicle dropped so dramatically. Maintenance is on par with the newer model Cadillacs.
THE WORST CAR I EVER OWNED..THE CAR FELL APART WEEK BY WEEK BUT THE STYLE OF THE CAR LOOKS GREAT..OVER 50TRIPS TOO THE DEALER....BRING YOUR WALLET