Safety features that come standard on all models include six air bags, including a dual-depth front-passenger air bag.

DTS ($41,170) comes with eight-way power front bucket seats with adjustable lumbar support; OnStar with one-year Directions & Connections Service; Adaptive Remote Starting; Magnasteer magnetic variable-assist rack-and-pinion steering; 17-inch chromed wheels, xenon HID headlamps; laminated side glass; and an MP3-capable stereo. XM Satellite Radio is also standard, including three months free service.

DTS with the Luxury I package ($44,170) adds StabilTrak; Brake Assist; memory for seats and outside mirrors; ultrasonic parking assist; heated outboard seats front and rear; seat cooling for driver and front-seat passenger; heated leather-wrapped steering wheel; heated windshield washer fluid; heated outside mirrors with integrated turn signal indicators; and a universal home remote.

The Luxury II package ($46,490) includes Luxury I plus a six-disc in-dash CD changer; eight-speaker Bose audio system; tri-zone climate control; four-way adjustable lumbar with massage for the front bucket seats; power tilt and telescoping steering column; wood accents on steering wheel; adjustable rear-seat headrests; rear-seat sun visors with vanity mirrors; power folding outside mirrors; IntelliBeam automatic headlamps; Rainsense wipers; and a cargo net for the trunk. Road wheels are still 17-inch chrome but feature a design unique to this package, and real dark burl walnut replaces the standard interior woodgrain trim.

The Performance package ($48,540) includes all but a few of the Luxury items plus the higher-tuned (L37) Northstar 4.6-liter V8 with 292 horsepower, performance algorithm shifting, Magnetic Ride Control, 18-inch wheels and H-rated tires.

Options include adaptive cruise control ($1695), a DVD-based navigation system ($1945), a front bench seat (no charge), DTS-exclusive Tehama leather upholstery ($1995), body color grille ($100), and a power tilt/slide sunroof ($1200).