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 1999 Cadillac Seville SLS
1999 Cadillac Seville SLS
1999 Cadillac Seville SLS Problems
The engine may develop an oil leak from the lower crankcase portion of the engine block. Our technicians tell us that the engine must be removed from the vehicle to properly repair this oil leak.
The crankshaft position sensor may fail causing the engine to stall intermittently, the Check Engine Light may or may not illuminate.
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 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.
1999 Cadillac Seville SLS Questions and Answers
After we charged the dead battery (yes, wife's fault), car starts, drives and things like cruise control, AC, etc work but nothing is illuminated on instrument panel and no gauges work to tell...
I recently purchased this vehicle from an auction. I took it home and replaced the spark plugs on it. Before replacing the plugs it ran a little rough. It smoothed out afterward. Then I started hav...
How hard is it to change the transmission mounts?
My 1999 Caddy SLS (88,000 mi) needs head gasket replacement. I am considering replacing engine to avoid other future potential problems. What would be a ballpark price I should expect to spend for ...
Air conditioning for driver side gives cool air; passenger side air vents only giving out warm air