Trim: Base This Onyx Black 2018 GMC Sierra 1500 Base might be just the double cab 4x4 for you. It comes with a 5.3 liter 8 Cylinder engine. This one's on the market for $42 170. With an unbeatable 5-star crash test rating this double cab 4x4 puts safety first. Drivers love the charming black exterior with a dark ash/jet black interior. This is the vehicle for you! Give us a call today and don't let it slip away! Customer and VIN# must qualify for GM rebates and discounts. Take delivery by the end of this month to take advantage of the GM rebates and discounts. Some rebates require a trade-in vehicle. If a deal has not trade you will have to give up the trade assistance rebate. Contact Information: Harry Robinson Buick GMC 6000 S. 36th Street Fort Smith AR 72908 Phone: (479) 646-8600 E-mail: email@example.com.