The full-size 2009 GMC Yukon SUV offers seating arrangements for five to nine passengers, and is available in three primary trim levels: basic SLE, upscale SLT and the ultra-luxurious Denali. The base SLE1 is well outfitted with 17-inch alloy wheels, heated power outside mirrors, a three-passenger 40/20/40-split bench front seat with built-in storage compartments, three-passenger second- and third-row seats, custom cloth trim, power driver seat, dual-zone air-conditioning, steering-wheel-mounted audio and cruise controls, OnStar communications, Bluetooth and an eight-speaker sound system with satellite radio and MP3-compatible CD player. The SLE2 adds foglamps, a luggage rack, front bucket seats with power adjusters, floor console, auxiliary power outlets and rear audio controls. For significantly more luxury, there is the SLT trim level: the SLT1 adds leather seating, triple-zone automatic climate control, power-adjustable pedals, remote vehicle starter, rear parking assist, universal home remote, a six-disc CD changer with premium Bose sound and Turn-by-Turn navigation for the OnStar system. Even more convenience and comfort is found on the SLT2 with its power-folding turn signal mirrors, 10-way power/heated front seats and heated second-row captain's chairs. If you want all this plus more distinctive styling and amenities, the top-of-the-line Yukon Denali also features a unique grille and trim, 18-inch alloy wheels, adaptive suspension with rear load-leveling, heated and cooled seats and a power-adjustable and heated steering wheel.