Cadillac's smallest sedan gets a new base model for 2005. It uses a 210-hp 2.8-liter V6 and slots in below the 255-hp 3.8-liter V6 version. The high-performance CTS-V returns with a 400-hp 5.7-liter V8. A 6-speed manual transmission is standard for all. V6s offer an optional 5-speed automatic with Sport and Winter modes but no manual shift gate. Also standard are antilock 4-wheel disc brakes, front side airbags, head-protecting curtain side airbags, and OnStar assistance.

Leather upholstery is optional for the 2.8, standard elsewhere. CTS-V includes xenon headlamps and an antiskid system, both optional for V6 models. An available Sport Package upgrades V6s with speed-variable steering assist, performance brakes, rear load-leveling suspension, and 17-inch wheels vs. 16s. CTS-V features unique exterior and interior touches, sport suspension, and 18-inch wheels with run-flat tires. A navigation system with voice activation is optional for V6 models. Satellite radio and a sunroof are available for all.