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. We've got it for $40 920. Other dealers are asking for at least $42 170. Looking to buy a safer double cab 4x4? Look no further! This one passed the crash test with 5 out of 5 stars. Flaunting a classic black exterior and a dark ash/jet black interior. Interested? Call today and schedule a test drive! Customer and VIN# must qualify for GM rebates and discounts. Take delivery by 2-28-2018 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: firstname.lastname@example.org.