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 2003 Cadillac Seville SLS
2003 Cadillac Seville SLS
2003 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.
2003 Cadillac Seville SLS Questions and Answers
I heard a rumor that the Northstar Engine head gasket was virtually impossible to replace when it blows??? Any feedback?
I have a 2003 SLS and want to replace the spark plugs. I had no problem finding them on my 1998 but, where are the plugs and wires hidden on my '03. I removed my Cadillac logo/engine specs. pl...
I change my oil reguarly but before it's time to change it or very close to it my dipstick will have no oil on it if I make a turn or on uneven ground my car will say oil pressure low.
I have a Bad shimmy that starts at about 55 mph and gets worse at 60 mph. I have had the tires checked they have been balanced and the front end has been checked for worn parts..The front end ahs h...