The on-demand 4WD system in this full-size pickup comes with low-range gearing, a rear locking differential, and mechanical and locking center differentials. Combined with the standard skid plates, 20-inch wheels (18-inch available), the automatic rear load leveling and adaptive suspension, the 2008 Chevrolet Avalanche LTZ 4WD marries functionality and heft with interior comfort and luxury. Power is supplied by a 320-hp, 5.3-liter flex-fuel V8 and 4-speed automatic, which can tow around 8,000 pounds. A 6.3-liter, 366-hp V8 can be substituted.

Utility comes in the form of a 5-foot pickup bed that features tie-downs, a hard cover, a power outlet, and lockbox. A bed extension can be added. For extra space, remove the midgate wall and window and fold down the rear seats for an 8-foot-long bed. The cabin offers 39 inches of rear legroom, nearly matching the 41 in the front, and passengers get four cupholders, a power outlet, and audio controls. On the outside sit a roof rack, chrome moldings and side steprails, and a rear step. Safety features include 4-wheel ABS brakes, dual front and side impact airbags, stability control, rollover sensors, parking assist, and a rearview camera. A tire monitor, first aid kit, OnStar, auto-dimming rearview mirror, folding side mirrors, halogen lamps, foglights, automatic headlights, and rain-sensing wipers are also standard.

The luxury part is supplied by leather upholstery, heated front seats, 10-way power front seats with driver's side power lumbar and memory settings, and dual-zone climate control. The 6-CD changer comes with satellite radio and an MP3 jack, with audio controls on the steering wheel next to the cruise control. A trip computer, temperature display and compass, remote start, remote entry, a garage door opener, security system, and intermittent wipers round out the equipment list of the 2008 Avalanche LTZ 4WD. A DVD player, navigation system, and tilt sunroof are optional, along with powered sidesteps.