Nuts and Bolts Every 2006 Cadillac DTS is equipped with larger antilock brakes with brake assist and traction control. StabiliTrak stability control is standard on all but the base-level DTS, and when equipped with the Performance package a magnetic ride control suspension is included.

Mainly because they’re sitting in the parts bin so GM might as well use them, two versions of the 4.6-liter Northstar V8 are available in the 2006 Cadillac DTS. The standard motor makes 275 horsepower and employs an electronic throttle control that is calibrated for the quick off-the-line and part-throttle response that Cadillac believes the traditional customer likes, while the optional version that’s included in the Performance package generates 291 horsepower at higher revs but whips up less peak torque, resulting in better mid-range response for highway passing. Both engines are mounted to a new front engine cradle, which itself is attached to the front frame rails for greater strength and a reduction in vibration. Cadillac says this revised engine mounting setup results in a quieter, smoother, more refined ride quality.

Not surprisingly given the identical displacement and negligible differences in power ratings, the EPA gives each engine a fuel economy rating of 18 mpg in the city and 27 mpg on the highway. Between both motors, we managed an average of 18.8 mpg in a mix of city, highway, and country driving. Cadillac recommends the use of premium fuel for optimum performance, but doesn’t require it.

Every 2006 Cadillac DTS is equipped with larger antilock brakes and traction control. StabiliTrak stability control and brake assist technology come standard on the Luxury 2, Luxury 3 and Performance packages, and when equipped with the Performance package the DTS gets a magnetic ride control suspension. Luxury models have a revised suspension that aims to quell body roll in corners and float over larger swells and dips in the pavement. Cadillac also includes a load-leveling rear suspension on every DTS to ensure predictable, stable handling.

Standard equipment includes 17-inch wheels and tires, with 18-inch rims and rubber a part of the Performance package. Magnasteer magnetic variable assist steering is standard, but has been recalibrated for more linear off-center response and less tug back to center in long, sweeping curves. Minor structural modifications help stiffen up the structure to give the DTS nominal improvements in ride, handling, refinement, and safety.