The 2026 GMC Sierra 1500 gives drivers in Helena multiple engine options. The 5.3-liter V8 generates 355 horsepower along with 383 pound-feet of torque. For those wanting even more, the 6.2-liter V8 creates 420 horsepower and 460 pound-feet of torque. A 2.7-liter TurboMax engine is also available, making 310 horsepower and 430 pound-feet of torque. The 3.0-liter Duramax Diesel option provides 305 horsepower with 495 pound-feet of torque for better fuel efficiency.
This truck comes with either an 8-speed or 10-speed automatic transmission. Features like Tow/Haul Mode, Cruise Grade Braking, and Powertrain Grade Braking are included. Montana drivers can select rear-wheel drive (RWD) or 4-wheel drive (4WD) configurations. The X31 Off-Road Package offers off-road suspension, Hill Descent Control, and protective skid plates.
Many trims feature a standard auto-locking rear differential for improved traction on various surfaces. Stop by Lithia GMC of Helena at 1501 Cedar St, Helena, MT to see the 2026 GMC Sierra 1500 for yourself.