Edmunds Answers



  • igozoomzoom 11/03/12 3:57 am PST

    The 1999 Seville STS has the Northstar L37 (300hp) paired with the 4T80 4-speed automatic. The 2000-2005 Deville DTS and 2006-up DTS also use the 4T80. But some internal changes were made for 2005 that might affect compatibility with earlier models. But if it's from a 2004-earlier Deville DTS, you should be fine.

  • MrShift@Edmunds 11/03/12 11:26 am PST

    If you're buying from a wrecking yard, they have access to the Hollander Interchange Database, which should tell you. In swapping components from different years, the question of compatibility of electronic controls always comes up, even if the actual parts bolt up.


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