INTRODUCING THE 2027 HEAVY DUTY LINEUP
The new Chevrolet Silverado HD and GMC Sierra HD. More pulling power. More precise control. Built for what comes next.
THE BIGGEST CHANGES FOR 2027
ALL-NEW 8.3L Duramax Diesel—the most powerful diesel engine EVER in a GM HD truck.
The biggest upgrades are the ones you feel with a trailer behind you. For 2027, new engine capability joins electric power steering and eBoost braking to help you pull harder, manoeuvre more easily and manage demanding downhill grades with greater confidence.
| What changed | Previous HD lineup | 2027 HD lineup |
|---|---|---|
| Available Duramax diesel | 6.6L V8 | All-new 8.3L V8 |
| Diesel horsepower / torque | 470 hp / 975 lb.-ft. | 555 hp / 1,230 lb.-ft. |
| Standard gas V8 output | 401 hp / 464 lb.-ft. | 412 hp / 472 lb.-ft. |
| Steering assistance | Hydraulic | Electric power steering |
| Brake assistance | Hydraulic boost | New electronic eBoost |
| ZR2 / AT4X off-road control | Existing off-road hardware | New Terrain Mode + larger DSSV dampers |
Comparison with the outgoing 2026 Silverado HD / Sierra HD powertrains. Features and equipment vary by model and trim.
01 / POWER
The available all-new 8.3L Duramax brings 85 more horsepower and 255 more lb.-ft. of torque than the outgoing diesel. Serious pulling strength for equipment trailers, large RVs and demanding work.
Want diesel pulling power? Explore the 555-hp Duramax with Allison® 10-speed automatic transmission.
Prefer a gas-powered HD? The enhanced 6.6L V8 delivers 412 hp and 472 lb.-ft. of torque.
02 / STEERING & BRAKING
New electric power steering helps make tight job sites, parking and low-speed manoeuvres easier. New eBoost braking delivers more predictable pedal feel and responsive stopping under load.
At the campsite: Easier manoeuvring when positioning your truck and trailer.
On the descent: Braking improvements designed for demanding downhill grades and repeated stops while towing.
03 / TRAILERING TECHNOLOGY
Available camera views and integrated trailering tools help you see around the truck and trailer when hitching, reversing or changing lanes.
Up to 14 available camera views for a more informed view of your surroundings.
A reason to buy: Pair new mechanical control with useful towing technology for the trips you make every week.
TWO IDENTITIES. SERIOUS HD CAPABILITY.
CHEVROLET
Purposeful strength for the workday. Choose the capability you need, from hardworking WT to premium High Country, with ZR2 for rugged off-road use.
2027 highlights: new powertrains, electric steering, eBoost braking and new ZR2 Terrain Mode.
GMC
Commanding capability with a premium edge. Explore Denali craftsmanship or AT4X off-road hardware alongside the new generation of HD power and control.
2027 highlights: new powertrains, electric steering, eBoost braking and new AT4X Terrain Mode.
WHY MAKE YOUR NEXT TRUCK A 2027 HD?
WORK & EQUIPMENT
New diesel output and upgraded control make a compelling case for drivers moving machinery, materials and heavy trailers.
RV & RECREATION
Pulling strength, improved braking and available camera views support confident travel with a properly matched fifth-wheel or travel trailer.
OFF-ROAD & BACKCOUNTRY
New Terrain Mode on Silverado HD ZR2 and Sierra HD AT4X adds low-speed control, while larger Multimatic® DSSV dampers help manage rough terrain.
BEFORE YOU CHOOSE
The exterior looks familiar. The major changes for 2027 focus on engine power, steering, braking and off-road control. That is where this update makes its strongest case.
No. Maximum available towing applies to a properly equipped configuration. Cab, bed, drivetrain, axle ratio, hitch and equipment affect towing and payload. Ask our team to match the truck to your actual loaded trailer and hitch weight.
The new available Duramax diesel offers the strongest output for demanding towing. The enhanced gas V8 is another option for HD work. Your trailer weight, driving patterns and ownership priorities will help determine the right fit.
Use the update request on this dealership page or call Harris Oceanside. Our team can provide current Canadian ordering, pricing and availability information.
BE FIRST TO KNOW
Tell us which truck you want to learn more about and our team will keep you informed as more details become available.
