4WD, Black Leather.GMC Dealership Serving Boulder, CO Drivers – Mike Maroone GMC GMC Sales, Service, and Parts in Boulder, CO If you have been longing to get into a new GMC close to Boulder, CO, then right now is an ideal opportunity to find your next auto at a low cost, here at Mike Maroone GMC. Enjoy Free Delivery anywhere in Colorado. Our GMC Truck line is headed by the Sierra 1500, 2500 and 3500, each new GMC model can be found here at our Boulder, CO dealership. Discover your new GMC in Boulder now for a test spin of your dream car.Awards: * 2015 KBB.com 10 Best Luxury SUVsReviews: * Available seating for up to eight passengers; strong V8 power; stout towing capacity; quiet interior. Source: Edmunds * Shop here if you need your SUV to carry up to eight passengers, all of their stuff, and tow up to 8,300 pounds. Not only can you do all that, but you’ll look good while doing it. Source: KBB.com