1998 DeVille

The DeVille, d'Elegance and Concours sedans again comprised the series.

• The DeVille and d'Elegance used the 275-horsepower version of the Northstar 4.6-liter V-8 for power while the Concours featured the 300-horse Northstar.
• Both versions of the engine were coupled to the 4T80-E electronically controlled four-speed automatic transmission with viscous converter clutch.
• The StabiliTrak stability control system was already standard equipment on the Concours and offered on the DeVille and d'Elegance as part of a safety/security option package that also included an electronic compass/mirror, audible theft deterrent system and programmable garage door opener.
• The DeVille series offered four new exterior colors for 1998:
  • Baltic Blue
  • Gold Firemist
  • Moonstone
  • Crimson Pearl
• Inside, two new interior color choices were available:
  • Camel (available only in leather)
  • Pewter (available in cloth or leather in the DeVille and leather only in d'Elegance and Concours)
• Additionally, the series' personalization feature added two new locking modes to the three that already existed:
  • all doors lock when shifting out of park and only the driver's door unlocks when the key is turned off.
  • all doors lock when shifting out of park and unlock when the key is turned off
• Also, the remote keyless entry fob added a feature: when the lock button was pressed, the horn sounded to verify that the doors were locked.
• All three sedans now came with an airbag warning label affixed to the passenger visor and each received a revised electrochromic day/night inside rearview mirror.
• The radio installed in DeVille series sedans also received a mute button and Theftlock, while radio data system (PDS) and weather band were offered as part of the optional Active Audio sound system.
• PDS allowed broad-casters to deliver a 1200-bits-per-second data stream along with audio content.
• The Concours' standard radio also received an in-dash, single-slot CD player.
• Unique new standard features to the Concours included restyled 16-inch cast aluminum wheels as well as the next generation of Magnasteer that reacted to lateral acceleration as well as speed.
• When the cornering rate was up, as sensed by an on-board lateral accelerometer, steering effort was automatically increased to enhance the driver's feel of the road.
• Both the d'Elegance and Concours added heated front seats to their list of standard fare.
• The OnStar in-vehicle communications system was again offered to DeVille/ d'Elegance /Concours buyers as a dealer-installed option.