OnStar, CD changer and rain sensing windshield wipers were also available on the 1998 Cadillac Seville. Both the SLS and STS received the Cadillacs 4.6-liter V-8 Northstar engine paired with a ...
The SLS is essentially an STS lengthened an additional 100mm (~4 inches) to give backseat passengers additional room to stretch out. In the press release accompanying the above photo, GM states ...