Cadillac STS 1998-2004 Specifications

The 1998-2004 Cadillac STS offered two engine options: a 4.6L Northstar V8 producing 300 hp and 295 lb-ft of torque, and a 3.5L V8 producing 200 hp and 215 lb-ft of torque. The 4.6L engine provided superior acceleration and higher top speeds, while the 3.5L engine offered better fuel efficiency.

All models of the 1998-2004 Cadillac STS were equipped with a 4-speed automatic transmission, featuring adaptive shift control and optional performance mode for enhanced driving dynamics.

Standard safety features included dual front airbags, anti-lock brakes (ABS), traction control, and OnStar emergency communication. Optional features included side airbags, stability control, and a tire pressure monitoring system.

The 1998-2004 Cadillac STS achieved an EPA-estimated 17 mpg city and 26 mpg highway with the 3.5L engine, and 16 mpg city and 24 mpg highway with the 4.6L engine. This was competitive with luxury sedans of the era, such as the BMW 5 Series and Mercedes-Benz E-Class.

Recommended maintenance includes oil changes every 3,000-5,000 miles, tire rotation every 7,500 miles, and a comprehensive inspection every 15,000 miles. Regular fluid checks and brake inspections are also advised.

Standard features included leather upholstery, power-adjustable seats, automatic climate control, and a premium sound system. Optional features included a sunroof, heated seats, a navigation system, and a Bose premium audio system.

The Cadillac STS offered 13.4 cubic feet of trunk space and seating for up to five passengers. This was comparable to competitors like the Lexus GS and Audi A6, though slightly smaller than the Mercedes-Benz E-Class.

The 1998-2004 Cadillac STS was not designed for towing and does not have a specified towing capacity. Payload capacity was limited to passengers and cargo within the vehicle's weight limits.