2020 GMC Sierra AT4 HD | Capability Features | GMC Canada

POWER TO GO BEYOND THE PAVEMENT

The First Ever Sierra HD AT4 allows you to confidently travel beyond the beaten path by combining powerful engine options with advanced off-road capability.

OFF-ROAD SUSPENSION WITH RANCHO®† SHOCKS AND SKID PLATES

IMPRESSIVE GROUND CLEARANCE 

TRACTION SELECT SYSTEM WITH OFF-ROAD MODE 

ALLISON®† 10-SPEED AUTOMATIC TRANSMISSION

ADVANCED POWER

The First Ever Sierra HD AT4 offers advanced engines that help power a confident driving and trailering experience.

Available 6.6L Duramax® Turbo Diesel V8

  • 445 hp
  • 910 lb-ft of torque
  • Compression Ratio of 16:1
  • Diesel Exhaust Brake System
  • Valve Train: overhead-valve, four valves per cylinder

All-New 6.6L V8 Gas Engine

  • 401 hp
  • 464 lb.-ft. of torque
  • Compression Ratio of 10.75:1
  • Valve Train: overhead-valve, two valves per cylinder, variable valve timing

DENALI MODEL SHOWN

PROGRADE™ TRAILERING SYSTEM

AUTO ELECTRIC PARKING BRAKE

PARK GRADE HOLD ASSIST

U.S. MODEL SHOWN

DIGITAL VARIABLE STEERING ASSIST 

2-SPEED AUTOTRAC TRANSFER CASE

Available Gooseneck/Fifth-Wheel Prep Package

Strong Foundations

NEXT STEPS

  • Rancho is a registered trademark of Tenneco Automotive Operating Company Inc.

  • Eaton is a registered trademark of Eaton Corporation.

  • Requires 3500 Long Box 4WD model with 6.6L Gas Engine and 20 in. Wheels.

  • Allison is a registered trademark of Allison Transmission, Inc.

  • App functionality and features vary with vehicle equipment and trim level. Data connection may be required. Some features require active service plan and working electrical system. Terms and limitations apply.

  • Device data connection required. Available on select Apple and Android devices. Some features require active service plan and working electrical system. Service availability, features and functionality vary by vehicle. Terms and limitations apply.

  • Comparison based on wardsauto.com 2019 Large Pickup segment and latest competitive information available at the time of posting. Excludes other GM vehicles. Read the vehicle Owner’s Manual for important feature limitations and information. Some camera views require available accessory camera and installation. Not compatible with all trailers. See your dealer for details.

  • Read the vehicle Owner’s Manual for important feature limitations and information. Some camera views require available accessory camera and installation. Not compatible with all trailers. See your dealer for details.

  • Comparison based on wardsauto.com 2019 Large Pickup segment and latest competitive information available at the time of posting. Excludes other GM vehicles.

  • Read the vehicle Owner’s Manual for important feature limitations and information.

  • Compared to the previous-year-model Sierra Heavy Duty.

  • Image shown with available 6.6L Duramax Turbo Diesel V8 engine.

  • Manufacturer's Suggested Retail Price, includes freight and $100 air conditioning tax if applicable. License, insurance, registration, fees associated with filing at movable property registry/PPSA, administration fees, duties and taxes extra. Dealers are free to set individual prices. See dealer for details. U.S. model shown. Image may not show the configurable options selected or available on the vehicle. Some colour options are available at extra cost and may only be available on select trims.

  • Manufacturer's Suggested Retail Price, does not include freight, air conditioning charge and Tire fee if applicable. License, insurance, registration, fees associated with filing at movable property registry/PPSA, administration fees, duties and taxes extra. Dealers are free to set individual prices. See dealer for details. U.S. model shown. Image may not show the configurable options selected or available on the vehicle. Some colour options are available at extra cost and may only be available on select trims. On Locate a Vehicle shopping tool, Manufacturer's Suggested Retail Price includes freight, $100 air conditioning tax and Tire fee if applicable. License, insurance, registration, fees associated with filing at movable property registry/PPSA, administration fees, duties and taxes extra. Dealers are free to set individual prices. See dealer for details. U.S. model shown. Image may not show the configurable options selected or available on the vehicle. Some colour options are available at extra cost and may only be available on select trims.

  • Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual.  The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • For comparison purposes only.  See the Owner’s Manual and the label on the vehicle door jamb for the carrying capacity of a specific vehicle.

  • When properly equipped, includes weight of vehicle and trailer combination, including the weight of driver, passengers, fuel, optional equipment and cargo in the vehicle and trailer.

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