GMC Sierra 2026 Automatic Detailed Specifications for GMC Sierra 2026 SLE Engine and Performance: 5.3L V8 EcoTec3 Engine: Generates (approx. 355 hp) with Active Fuel Management system. 10-speed electronic precision automatic transmission. Standard 4-wheel drive (4WD) system. Exterior Design: 20-inch aluminum wheels (in gray or polished). Distinctive chrome grille for SLT/SLE models. C-shaped LED headlights. MultiPro tailgate with 6 functions (open, close, step, barrier, work surface). Rear sensors and rearview camera. Interior and Technology: 13.4-inch touchscreen infotainment display (latest GMC system). 12.3-inch digital driver information center display. Perforated leather front seats, electrically adjustable (10-way) with heating and ventilation. Wireless Apple CarPlay and Android Auto support. Audio system (available with Bose or Kicker MultiPro system). Sales Representative 0506985208