2026 GMC Sierra 1500 AT4

The Sierra 1500 is GMC's full-size pickup, offered in trims from the work-oriented Pro to the luxury Denali Ultimate. It competes head-to-head with the Ford F-150, Ram 1500, and Chevrolet Silverado 1500. The Sierra drives with a composed, planted feel, and the available adaptive suspension smooths out rough pavement nicely. Cabin space is generous, with a roomy crew cab and a bed that handles serious hauling duties. A large touchscreen with wireless Apple CarPlay and Android Auto comes standard, along with a full suite of driver assists. The AT4 is GMC's off-road-ready Sierra, above the Elevation and below the Denali in the lineup, gaining a factory lift, Rancho shocks, and underbody skid plates. The optional Performance Upgrade Package adds an auto-locking rear differential and enhanced cooling for sustained towing, though the standard setup already handles serious dirt work.