1991 Seville
The Seville sedan and Seville Touring Sedan (STS) again comprised the Series 6K lineup.
Updates and revisions mirrored those charges listed for the Eldorado, with the exception of the following: The STS received new blue-tinted outside rearview mirrors as standard equipment and its seating area was revised.
In addition to redesigned seats, new full Beechwood leather front bucket seats included six-way power seat adjusters, power recliners and power lumbar support for driver and passenger. There was also a full-width rear leather seat with integral headrests. The previously seen rear console was eliminated to accommodate a third center rear seat passenger.
Final drive ratio for the Seville sedan was 2.97:1 while the SLS's was 3.33:1.
The STS was equipped with the firmer ride and handling of a touring suspension package. It included 23mm front and 16mm rear stabilizer bars, special 16-inch forged aluminum wheels with Goodyear Eagle GT4 P215/60R16 tires. A touring package with 15-inch cast aluminum wheels and Goodyear Eagle GT4 P215/65R15 tires was optional on the Seville sedan.
High-gloss birdseye maple wood was used to accent the Seville's instrument panel and console, while the STS exclusively featured elm burl high-gloss wood in all door panels, instrument panel and console.
The 1991 Sevilles also received a new taillamp treatment and neutral density back-up lamps.
| The 1991 Cadillac had a 17-symbol vehicle identification number (VIN) stamped on a metal tag attached to the upper left surface of the cowl visible through the windshield. |
| The code was as follows: |
| The first digit "1," represented the manufacturing country (United States) |
| The second, "G" represented General Motors. |
| The third, "6," represented Cadillac |
| The fourth and fifth represented the car line/series, K/S=Seville, K/Y=Seville Touring Sedan |
| Digit six represents the body style: 5=four-door sedan |
| Digit seven identities the restraint code: 1=active (manual) belts, 3=active (manual) belts w/driver's side airbag, and 4=passive (automatic) belts. |
| The eighth digit identifies the engine: "B"=L26 4.9L V-8 |
| A check digit follows. |
| The 10th digit represents the model year, "M" for 1991. |
| The eleventh digit represents the assembly plant. |
| The remaining six digits identify the production sequence number. |
| Model | Series | Body/Style | Body Type | Factory Price | Shipping Weight | Production Total |
| Seville | KS5 | S69 | 4-dr. Sedan | $33935 | 3513 lb | Seville production totaled 26,431 with no further breakout available. |
| Seville | KY5 | Y69 | 4-dr. Sedan | $33935 | 3565 lb | Seville production totaled 26,431 with no further breakout available. |
1991 Seville
| Type | 90-degree overhead valve V-8 |
| Block | Aluminum block |
| Cylinders | cast iron cylinder liners |
| Head | cast iron cylinder heads |
| Displacement | 300 cu. in. (4.9 liters) |
| Bore & Stroke | 3.62 x 3.62 in. |
| Compression ratio | 9.5:1 |
| Bhp | 200@4100 rpm |
| Torque | 275 lb.-ft. @ 3000 rpm |
| Lifters | Roller hydraulic valve lifters |
| Injection | Sequential port fuel injection |
| Feature | Standard | Touring | STS with 16" wheels |
| Wheelbase | 108.0 in. (2743 mm) | 108.0 in. (2743 mm) | 108.0 in. (2743 mm) |
| Overall Length | 190.8 in. (4846 mm) | 190.8 in. (4846 mm) | 190.8 in. (4846 mm) |
| Height | 53.2 in. (1351 mm) | 53.2 in. (1351 mm) | 53.2 in. (1351 mm) |
| Width | 72.0 in. (1829 mm) | 72.0 in. (1829 mm) | 72.0 in. (1829 mm) |
| Front Tread | 59.9 in. (1521 mm) | 59.9 in. (1521 mm) | 59.9 in. (1521 mm) |
| Rear Tread | 59.9 in. (1521 mm) | 59.9 in. (1521 mm) | 59.9 in. (1521 mm) |
| Standard Tires | P205/70R15 | Goodyear Eagle GT4 P215/65R15 | 215/60R16 |
| Transmission | 4T60-E electronically controlled four-speed automatic with overdrive (includes viscous converter clutch) |
| Steering | Power-assisted rack-and-pinion |
| Front Suspension | independent Macpherson strut with coil springs, strut-type shock absorbers integral in-strut and Computer Command Ride and stabilizer bar |
| Rear Suspension | Fully independent transverse monoleaf with automatic level control and Computer Command Ride. no rear stabilizer |
| Brakes | Power assisted front disc/rear drum w/Teves anti-lock braking system. Seville used Bosch Il ABS |
| Body Construction | integral body-frame |
| Fuel Tank | 18.8 gal. |
1990