As is the case with its corporate twin from Chevy, the redesigned 2007 GMC Yukon’s more powerful base 4.8-liter V8 is now rated at 290 horsepower, up from 285 last year, while the 5.3-liter V8’s horsepower is up from 295 to 320. That small-block V8 features GM’s Active Fuel Management cylinder deactivation system, and with the redesigned Yukon’s improved drag coefficient, EPA combined fuel economy is expected to rate 20.5 mpg on two-wheel-drive trucks and 20.1 mpg on four-wheel-drive units. On paper, that’s up from combined ratings of 16-17 mpg for 2006 models, though our experience so far shows the technology to be ineffective. The upscale Denali model continues on for 2007 and can be equipped with a new 6.2-liter V8 that features variable valve timing and 380 horsepower complemented by 415 lb.-ft. of torque. The Yukon XL, also known as a warmed-over and rebadged Chevrolet Suburban, draws power from the 5.3-liter small block or a 6.0-liter V8 with 355 horsepower and 365 lb.-ft. of torque. Prices range from about $34,000 for the 2007 GMC Yukon to about $37,000 for the 2007 Yukon XL.