Most significant changes: A new, more rugged model joins the lineup

Price change: TBA

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On sale: October

Jeep adds a new off-road-oriented model to the Grand Cherokee roster for 2013. The Grand Cherokee Trailhawk adds capability-enhancing gear and specific exterior styling cues for a more rugged look. Also for 2013, Overland Summit models get more standard features and a new interior color choice.

Jeep's largest SUV returns for model-year 2013 in Laredo, Limited, Overland and Overland Summit trims. The Trailhawk model uses the 290-horsepower, 3.6-liter V-6 or the 360-hp, 5.7-liter V-8. Five- and six-speed automatic transmissions also return. No word yet on the eight-speed automatic transmission or diesel engine expected to debut this year.

Standard features on the Trailhawk version include the Quadra-Lift air suspension, Selec-Terrain system with hill descent control, 18-inch Goodyear Silent Armor tires with Kevlar reinforcement and rock rail and underbody protection. V-8 models can add a rear electronic limited-slip differential. The air suspension system, also available on other models, features five driver-selectable height settings and offers up to 4.1 inches of lift. The Selec-Terrain system has five settings that tailor the SUV?s response to five different driving conditions: sand/mud, sport, auto, snow and rock.

Trailhawk-specific styling updates distinguish the model from the lineup, such as red Trailhawk and Trail Rated badges and tow hooks; a hood decal and accent stripe; five-spoke 18-inch aluminum wheels; black-surround headlamps; and gray-painted grille surround with matching side mirrors. Inside, the new model gets black suede and leather performance seats with red contrast stitching, the Trailhawk logo and Mopar floormats.

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For 2013, Jeep is also adding more standard features to the Overland Summit trim, including the Front Park Assist system, power-folding outside mirrors and headlight washers. The model is also now available with black or saddle-colored Nappa leather seats. There's no word yet on pricing, but the Trailhawk model will go on sale in October.