The Seville, coming off a major redesign the previous year, returned with its two sedan line-up: Seville Luxury Sedan (SLS) and Seville Touring Sedan (STS). The car is three inches shorter than the old model and has a two-inch (5 cm) wider stance to enhance ride and handling. There is an extra 1.7 inches (4 cm) of headroom in the new model, and slightly more shoulder room. However, due to the shorter body length, there is a slight loss of rear leg room. The optional adaptive seating system detects pressure points and adjusts 10 strategically placed air cells in the seat cushion.
The Bose 4.0 sound system puts out nearly 425 watts of music power through its eight speakers, which include a 12-inch subwoofer. The Bose system is smart enough to automatically adjust volume and tone levels to compensate for changing cabin sound conditions.
Cadillac's 4-speed automatic transmission features a Performance Shift Algorithm that analyzes your driving and adjusts the shifting appropriately. Hit the throttle hard and it duplicates the crisp shifts of a manual transmission. Accelerate gradually and the transmission shifts smoothly. Go through a corner under hard acceleration and the system is smart enough to delay shifting until you are through the turn, which improves handling balance.
For increased active safety, the Continuously Variable Road Sensing Suspension responds to changing road conditions to optimize ride and handling; it alters shock damping rates to find an optimal balance between comfort and handling.
Other distinctive features:
| Feature | Seville SLS | Seville STC |
| Type | 90-degree dual overhead cam Northstar V-8 | |
| Valving | Four valves per cylinder (32 total) | |
| Block | Aluminum block with cast iron cylinder liners | |
| Heads | aluminum | |
| Displacement | 4.565 liters | |
| Bore & Stroke | 93mm x 84mm | |
| Compression ratio | 10.3:1 | |
| Power | 205 kW @ 5600 rpm | 224 kW @ 6000 rpm |
| Torque | 407 Nm @ 4000 rpm | 400 Nm @ 4400 rpm |
| Tappets | Direct acting hydraulic tappets. | |
| Fuel supply | Tuned port multi-point fuel injection. | |
| Fuel type | Premium Unleaded | |
| Fuel economy EPA city | 17 mpg (13.8 l/100km) | |
| Fuel economy EPA highway | 26 mpg (9 l/100km) | |
| Feature | Dimension |
| Layout | Front-wheel drive |
| Wheelbase | 112.2 in. (285 cm) |
| Overall Length | 201.0 in. (510.5cm) |
| Height | 55.4 in. (140.7 cm) |
| Width | 75.0 in. (190.5 cm) |
| Front Tread | 62.7 in. (159 cm) |
| Rear Tread | 62.3 in. (158 cm) |
| Front Suspension | Independent |
| Rear Suspension | Independent |
| Tires | Goodyear Eagle LS P235/60HR16 |
| Turning Radius | 40.5 ft (12.3 m) |
| Brakes (front/rear) | disc/disc |
| Ground Clearance | 5.4 in. (13.7 cm) |
| Curb Weight | 3970 lb (1805 kg) |
| Towing Capacity | 3000 lb. (1364 kg) |
| Seating Capacity | 5 |
| Front Head Room | 38.2 in. (97 cm) |
| Front Hip Room | 55.6 in. (141 cm) |
| Front Leg Room | 42.5 in. (108 cm) |
| Rear Head Room | 38.0 in. (97 cm) |
| Rear Hip Room | 57.5 in. (146 cm) |
| Rear Leg Room | 38.2 in. (97 cm) |
| Trunk Volume | 15.7 cu. ft. (445 liters) |
| Transmission | 4T80-E electronically controlled four-speed automatic (includes viscous converter clutch) |
| Steering | Power-assisted rack-and-pinion, Magnasteer |
| Front Suspension | Independent MacPherson strut with coil springs, stabilizer bar and electronic continuously variable road sensing suspension. |
| Rear Suspension | Independent multi-link, aluminum control arms, lateral toe links, coil springs, stabilizer bar w/automatic level control and electronic continuously variable rood sensing suspension. |
| Brakes | power front and rear disc w/four-channel anti-lock braking system and StabiliTrak |
| Body Construction | Integral body-frame. |
| Fuel Tank | 18.5 US gal. (70 liters) |
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1998