The 2021 GMC Sierra 1500 SLT X31 4WD is powered by a 5.3L V8 Engine with an 8-Speed Automatic Transmission. Comes equipped with heated seats and more. For more details call us at 843-528-3301 or 843 528-3100 or send us an email. Parker's Used Cars is a family owned and operated independent used car dealer that carries only the highest quality used cars, trucks, SUV's and motorcycles available. We proudly serve and sell to customers from Florence, SC, Myrtle Beach, SC, Columbia, SC, Lumberton, NC, Wilmington, NC and even Charlotte, NC..