This 2023 GMC Sierra 2500HD AT4 is a diesel workhorse with real capability built in — white exterior over jet black and Kalahari accents inside. The 4WD and 10-speed automatic make it equally at home towing on the highway or handling rough terrain, and the AT4 trim means you get the good stuff without the price tag of a top-tier build. With diesel efficiency and a truck that's barely broken in, you're looking at serious longevity on the odometer. Head to us at Palm Beach Mitsubishi in West Palm Beach if you want to sit in it and get a real out-the-door number — I can walk you through the maintenance history and what this thing's capable of.
