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)
by life02 on Aug 11, 2011 Vehicle: 1999 Cadillac Seville STS 4dr Sedan
Just purchased my 99 STS 2 months ago after my 94 Eldo was backed into by a raised pickup;
I had the Northstar oil leak controlled in the Eldo - it only had 88K miles on it - just loved the style/ ride;
the STS has 1 previous owner; actually a "little old lady from Pasadena"; carfax showed 30+ entries for ALL services at dealer in Pasadena area; she even bought the tires there!
No evidence of any major probs in the records;
but then again, surprises do happen!
by ingloriousish on Aug 7, 2011 Vehicle: 1999 Cadillac Seville STS 4dr Sedan
I absolutely LOVE the feel of sliding in my car, turning that key (steering wheel, Seat AND mirrors adjust accordingly) and feeling that sexy piece of Northstar purr. But on the honest note, It has it's problems. I bought it used w/ 130,000. I've had one episode of overheating. Aside from that, It'll go to 3/4 temp gauge, drop and run nominal from there... If anyone has an answer for that, Feel free to holler at me! Anyway, INCREDIBLE car. Totally worth the money as long as you're willing to put some more into it!
by James on Apr 29, 2010 Vehicle: 1999 Cadillac Seville SLS 4dr Sedan
I love the gas mileage for a big car. Weird right. I bought it at 93,000 miles i put 30,000 on that. I love the design the luxury the creature comforts (which today's cars are just putting in) & of course the power of the north star V8 engine oh my. The things i hate the most are repairs, parts & reliability. The car runs smooth feel great but cost to much money to repair. I had my water pump replaced for $400 worn O ring almost ruined the entire engine. Left rear shock for $1,000 it burst. Still got to get the internal oil/coolant leak fix that will be an arm & leg. Brakes for $500. Molding on door for $120. Its like a girl who wants a sugar daddy to be pampered.
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.