Take a quick look around the 2026 GMC Sierra HD Pro and see the exterior, interior, truck bed and key features of GMC’s heavy-duty work-focused pickup. The Sierra HD lineup is built for drivers who need more capability than a light-duty pickup, with configurations available for towing, hauling, work and everyday use. Shop our GMC Sierra HD inventory: shorturl.at/dEkyP Questions about this Sierra HD or another truck in our inventory? Call Dave Sinclair Buick-GMC at (314) 842-4200. Dave Sinclair Buick-GMC serves truck shoppers throughout St. Louis, South County and the surrounding Missouri and Illinois area. #GMCSierraHD #SierraHD #GMCSierra #HeavyDutyTruck #GMCTrucks New Buick & GMC Inventory: bit.ly/4dUguGq Used Cars & Trucks: bit.ly/4bV3cXD Custom Trucks & SUVs: bit.ly/4s3tKfn Contact our team: davesinclairbuickgmc.com/contactus.aspx Dave Sinclair Buick GMC is located in St. Louis, Missouri and specializes in new Buick and GMC vehi...