There may be other differences, but the one I know is the SLS has a 275 HP engine and the STS has a 300 HP engine.
2003
Under the rear seat....
34mm
The fuse boxes in a 1998 Cadillac Seville sls are located between the panel and the driver\'s panel.
16.7 feet or 200.9inchs
You can purchase a Cadillac SLS from auction websites such as eBay motors. Alternatively, you can purchase these vehicles from classifieds such as Craigslist.
275
The thermostat on a 2001 Cadillac SLS is located in the radiator. To access it, remove the upper hose assembly after draining the radiator halfway.
Climate Control Panel
under and to the right of the distributor
There are a couple of reasons why a 1996 Cadillac Seville SLS may overheat. The coolant may be low or the thermostat needs to be replaced.
How to Replace spark plugs on 2004 cadillac deville Sls with 4.6 v8 engine