by johnr24 on Apr 7, 2013 Vehicle: 1999 Cadillac Seville STS 4dr Sedan
The Northstar engine until about 2002 had lugbolts that were too short. So it blows a headgasket climbing hills. $3500 to repair with new longer bolts. No old high mileage Northstars ,only dead ones. Engine not considered rebuildable. A Cadillac engine design mistake (30 yr Cad owner)
The Seville sees only minor changes after its successful redesign in 1998. Cadillac's new massaging lumbar seats are offered as an option on the STS. Heated seats become part of the adaptive seat package, which is now available on both SLS and STS trim levels. And the optional OnStar mobile communications system will automatically notify the OnStar customer assistance center in the case of any airbag deployment, front or side, so that the center can dispatch emergency services to the scene. Previously, notification occurred only with a front airbag deployment. There are also three new exterior colors, Cashmere, Parisian Blue and Sterling Silver, and one new interior shade called Oatmeal.