2027 GMC Sierra HD Price, Engine, Configurations – In 2027, GMC reinvents the Sierra HD with a bolder presence, reshaping its front end with an aggressive, modernized grille. The two-tier design features a wider stance and layered chrome accents that frame redesigned LED headlights with C-shaped daytime running lights. The front bumper is reprofiled to incorporate larger air intakes and integrated tow hooks, giving the heavy-duty truck an imposing, utilitarian look. Under the hood, the hood itself gets stronger creases and a central air channel that enhances engine cooling and stylistic flair. 2027 GMC Sierra HD Price
2027 GMC Sierra HD Redesign and Update Plan
Exterior & Interior
Inside, the 2027 Sierra HD creates a workspace-meets-luxury environment. The dash layout now centers on a 13.4-inch portrait touchscreen with GMC’s new Intellilink system—complete with onboard voice assistant and wireless Apple CarPlay and Android Auto. A reduced number of physical buttons delivers a sleeker cabin feel, paired with knurled aluminum dials for audio and climate control. Materials include genuine wood trim, metal accents, and leather-wrapped surfaces on upper trims, plus a customizable digital gauge display that can show trailer metrics, engine performance, and off-road data.
Driver comfort is addressed with multi-adjustable 16-way front seats, available in perforated leather with heating, cooling, and massage functions. SLT and Denali trims also feature second-row captain’s chairs with split-folding and recline for easier access and improved passenger comfort. Overhead, an extended sunshade panorama roof floods the cab with natural light. The center console houses a wireless phone charger, dual USB-C ports, and a modular tray system that converts between tool and office storage.
Utility extends to the rear. A fold-flat load floor reveals under-seat compartments and a 120V power outlet capable of powering tools or electronics. Bedside compartments are weather-sealed and backlit for visibility inside the box. A proprietary bedliner offers extra abrasion resistance, and the tailgate integrates a work surface with built-in rulers and clamps for on-the-job versatility.
The silhouette has been upgraded to match its changed personality. The cab and bed dimensions remain true to spec, but new fender flares accommodate optional 20” and 22” wheels wrapped in heavy-duty all-terrain tires. Bedside storage compartments now feature stronger locks and a new multi-function tailgate that swings open sideways or folds down traditionally. The side view also benefits from power-running boards that deploy automatically when doors open, enhancing accessibility without adding bulk.
Chassis upgrades are vital in this redesign, driven by a reinforced frame and updated suspension. High-strength steel is deployed around load-bearing C- and D-pillars. The rear springs are deeper and include a stabilizer bar to handle heavy payloads. Adjustable-rate Fox shocks bring a smoother ride even under load. Choose the ZR2 Off-Road package and you’ll also get updated front and rear sway bars, a front skid plate, 2-inch suspension lift, and Goodyear 35-inch tires for enhanced capability. 2027 GMC Sierra HD Price
2027 GMC Sierra HD Specs
Engine & Performance
Under the hood, the 2027 Sierra HD offers multiple powertrain choices. The base 6.6L V8 gas engine now features direct injection and variable valve timing, delivering 420 horsepower and 460 lb-ft of torque. The 6.6L Duramax Turbo-Diesel inline-six continues but receives an upgraded turbo and intercooling, boosting output to 495 hp and a class-leading 1,070 lb-ft of torque. Both engines are mated to a new 10-speed automatic transmission with tow-haul and manual shift capabilities. Fuel stop adjustments and tow-optimized logic smoother shifts and more precise responses under load.
Performance-wise, the diesel variant tows up to 21,000 pounds with a fifth-wheel trailer, while the gas version can haul 18,500 pounds. Available features include integrated trailer brake control, auto-leveling rear air suspension, and trailer-depth view and cargo monitor via the interior touchscreen. The ZR2 Off-Road package adds locking rear differential, skid plates, and electronic hill descent control for serious off-road capability.
Ride quality under load has improved, with the new rear suspension isolating heavy payloads from the cab more effectively. Noise control upgrades—acoustic glass, enhanced body seals, and new door mounts—make for a quieter cruise. A selectable performance exhaust gives drivers a more assertive tone when desired or a quieter cruise for highway travel.
2027 GMC Sierra HD Fuel Economy
Despite its heavy-duty nature, the new Sierra HD makes strides in fuel efficiency. The gas V8 achieves EPA ratings of 14 mpg city and 20 mpg highway, while the Duramax diesel pulls in 17/23 mpg—league-leading figures in its segment. The key is cylinder deactivation, improved aerodynamics, and precise engine calibration.
2027 GMC Sierra HD Safety Features
The 2027 Sierra HD brings GMC ProSafety 360 across all trims, featuring automatic emergency braking, pedestrian and cyclist detection, lane-keeping assist and lane departure warning, blind-spot monitoring with trailer coverage, and rear cross-traffic alert. For highway use, ProPilot Assist 2.1 adds adaptive cruise, lane-centering, lane-change assist, and semi-autonomous lane transitions—ideal when towing long distances.
Safety extends to trail and tow use. A head-up display projects speed, torque, trailer information, and navigation prompts onto the windshield. The MultiPro trailer interface displays rear and tongue camera feeds, delivering hitch-alignment assistance. Enhanced airbags—including front center and front knee bags—provide protection across the cabin. The frame receives additional high-strength steel reinforcements around the passenger cell.
Nighttime driving also improves, thanks to automatic high-beams, LED headlights with active cornering, and digital rearview mirror that displays a live bed-mounted camera feed. OnStar integrates crash detection, automatic emergency response, stolen vehicle assistance, and remote commands like engine start, door unlock, and bed light activation for improved driver safety and peace of mind. 2027 GMC Sierra HD Price
2027 GMC Sierra HD Release Date & Price
Pricing begins at $53,800 for gas-powered Work Truck trim, while the diesel version starts at $61,200. The SLT runs $65,900 (gas) and $73,300 (diesel). Denali tops out at $79,800 (gas) and $87,200 (diesel). Option packages include the ZR2 Off-Road package ($7,500), luxury Nappa leather upgrade ($3,200), and Premium Tech package ($1,800) with head-up display, ProPilot, and trailer view features. Destination charges remain steady at $1,895 across the board.
GMC begins production in April 2026 at its Flint Assembly plant in Michigan. Dealers start taking preorders in August 2026, with first deliveries arriving Stateside in October. Canadian and Gulf-Coast markets follow in November, with select international markets in early 2027, once emissions and homologation targets are met.