The 2023 GMC Sierra 1500 has a turbocharged four-cylinder engine, which produces 310 horsepower and delivers solid acceleration. Depending on your preference, you can also choose a V6 or V8 engine that can deliver between 355 and 420 horsepower. The engines are paired with a smooth-shifting 10-speed automatic transmission, which ensures maximum efficiency and durability. The 2023 GMC Sierra 1500 has a redesigned exhaust system that improves engine breathability and performance. The system enables the truck to produce a more aggressive exhaust note, which amplifies the truck's assertive and confident icon. The 2023 GMC Sierra 1500 is equipped with Dynamic Fuel Management Technology for maximum fuel efficiency. The system actively switches between different cylinder patterns for optimal fuel economy. The truck also has an integrated trailer brake controller and a trailering app that assists you in gauging fuel economy and tire pressure. With adaptive air suspension, the GMC Sierra eases the hitching process with the truck self-leveling as the trailer is hooked up. Test drive it at O'Fallon Buick GMC today.