Duallys are just as good in the snow if not better than single tires. I may not drive my current dually in the snow but I drove two 6.5's from 1993 to 2001.With the right tires and rear I hardly needed 4x4. The added weight and the 4 narrow tires made for MORE contact on the road surface. Four-Wheel Drive (4WD) When a car has four-wheel Drive, the engine sends power to all four wheels. Most 4WD vehicles run in RWD mode until they need all four wheels to grip the ground. A four-wheel drive system sends power equally to all four wheels and locks two drive shafts together. 4WD works best in deep snow and when you’re not on a Four-Wheel Drive (4WD) Available on all trims, The Yukon’s 4WD system can be switched from 2WD to 4WD Auto. 4WD is the most important feature to have in the Yukon if you plan on driving it in places with lots of snow and ice. It gives you more traction and improves the vehicle’s handling on slippery surfaces by sending power to all four wheels. This reduces traction. (It’s also why FWD cars – which have the weight of the drivetrain over the drive wheels – are generally better in snow than RWD vehicles.) Now add to the mix that all the engine’s power is flowing to just two rather than four wheels. If those two lose traction . . . The most basic definition of an all-wheel-drive vehicle is one that can send some percentage of engine power to the non-primarily powered wheels when needed. (Today, this is an oversimplification for most new cars driving off of the lot, but we’ll go with it for clarity’s sake.) AWD systems were originally made popular by European sports This feature gives you both advantages of a large and small vehicle. 1. Accurate Steering and Firm Brakes. The Chevy Tahoe has accurate steering and frim breaks to give you confidence on even the iciest of roads. All Tahoe’s can be manufactured with the 4-wheel drive system and antilock disc brakes for ultimate safety. High Range 4wd, or 4-high, allows you to drive full speed, if needed. The high range 4wd ratios are the same gear ratios that the vehicle has in 2wd. The best time to use 4 high is when additional traction is needed on terrain that is not very steep. 4 high is good to use on snow, ice, and muddy roads. Or even when your not operating on paved All-Wheel Drive (AWD) is a transmission system that allows power to be distributed to all four wheels (as opposed to rear wheel drive and front wheel drive, which only provide power to two wheels). AWD helps to provide traction, and when one wheel begins to slip, it is able to compensate to help keep your vehicle on its intended path. EzANR.