This 2026 GMC Yukon AT4 Ultimate 4WD pairs Onyx Black paint with an Obsidian Rush interior with Red Accents. Power comes from the Duramax 3.0L Turbo-Diesel engine teamed with an electric 10-speed automatic transmission, rated at 20 MPG city and 24 highway, plus an engine block heater. Preferred Equipment Group 4SG adds a massaging front passenger seat with power lumbar, bright door sill plates and the AutoSense Hands-Free Power Liftgate. Heated front bucket seats, the 16.8-inch diagonal Premium GMC Infotainment System with integrated navigation and a built-in virtual assistant, and SiriusXM with 360L round out the cabin. In stock at Temecula Valley Buick GMC in Temecula, CA. Stock G261351.