2021 GMC Sierra HD | Capability Features | GMC Canada

CAPABILITY

ENGINEERED TO DOMINATE

The 2021 Sierra Heavy Duty pickup truck offers up to 16,329 KG (36,000 LB.) of available max. towing. It’s built strong so you can tow strong. Its large drive shaft and rear axle will give you durability and strength. And its brakes and steering offer excellent control.

ADVANCED ENGINES & TRANSMISSIONS

The 2021 Sierra Heavy Duty truck features advanced engines and transmissions that power a confident driving and trailering experience:

  • 6.6L V8 Gas Engine
  • Available 6.6L Duramax® Turbo-Diesel V8 Engine with Allison®† 10-Speed Automatic Transmission

AT4 & DENALI’S HEAVY DUTY CAPABILITY

RESPONSIVE SUSPENSIONS

  • AT4 & Denali’s independent front suspensions provide excellent wheel alignment, ride comfort and turnability
  • Live-axle suspension includes two-stage, semielliptic multileaf rear springs to balance payload management and ride quality

OPTIMUM ENGINE PERFORMANCE

To help maintain optimal operating temperatures of the available 6.6L Duramax® Turbo Diesel V8 engine, a massive 28" variable-speed cooling fan is used. Dense, cool air from the Dual Path Air Induction System is drawn through both the hood scoop and the large grille to maximize horsepower and help optimize trailering performance. The factory-installed Diesel After-Run feature is designed to help cool down the engine following heavy usage.

STOPPING & GOING POWER

AVAILABLE AUTO ELECTRIC PARKING BRAKE ASSIST

To help with positioning, after backing up to a trailer hitch using available Hitch View, Sierra Heavy Duty will automatically apply the parking brake upon shifting into park to avoid unintentional rolling.

PARK GRADE HOLD ASSIST

Prevents movement when shifting out of park on a hill and moving a foot from brake to accelerator pedal by automatically applying brakes at each wheel for an extended period of time while trailering.

AVAILABLE DIGITAL VARIABLE STEERING ASSIST

U.S. MODEL SHOWN

Eases driver’s steering effort when manoeuvering at low speeds, reduces the steering effort needed to return the heavy-duty truck to centre, and adapts to crowned road surfaces, reducing the need to correct steering over long stretches of uneven road. It includes new enhancements to help with driving response, especially when trailering or when carrying a heavy load.

AVAILABLE 2-SPEED AUTOTRAC TRANSFER CASE

Sierra is the first heavy-duty truck in its class to offer a 2-speed AutoTrac™ transfer case with an active automatic 4WD setting, which provides seamless shifting between two- and four-wheel drive based on road conditions.

AVAILABLE TRACTION SELECT SYSTEM WITH TOW/HAUL MODE AND OFF-ROAD MODE

U.S. MODEL SHOWN

  • Allows you to quickly switch between multiple traction configurations, including Off-Road mode and Tow/Haul mode, to optimize powertrain calibrations, traction control settings and stability control system calibrations for a variety of terrain and driving conditions
  • The system will retain the Tow/Haul setting configurations for up to 4 hours after the vehicle is turned off, eliminating the need to reengage the system when returning from a brief stop on a long journey

AVAILABLE AUTO ELECTRIC PARKING BRAKE ASSIST

To help with positioning, after backing up to a trailer hitch using available Hitch View, Sierra Heavy Duty will automatically apply the parking brake upon shifting into park to avoid unintentional rolling.

PARK GRADE HOLD ASSIST

Prevents movement when shifting out of park on a hill and moving a foot from brake to accelerator pedal by automatically applying brakes at each wheel for an extended period of time while trailering.

U.S. MODEL SHOWN

DIGITAL VARIABLE STEERING ASSIST

Eases driver’s steering effort when manoeuvering at low speeds, reduces the steering effort needed to return the heavy-duty truck to centre, and adapts to crowned road surfaces, reducing the need to correct steering over long stretches of uneven road. It includes new enhancements to help with driving response, especially when trailering or when carrying a heavy load.

AVAILABLE 2-SPEED AUTOTRAC TRANSFER CASE

Sierra is the first heavy-duty truck in its class to offer a 2-speed AutoTrac™ transfer case with an active automatic 4WD setting, which provides seamless shifting between two- and four-wheel drive based on road conditions.

U.S. MODEL SHOWN

AVAILABLE TRACTION SELECT SYSTEM WITH TOW/HAUL MODE AND OFF-ROAD MODE

  • Allows you to quickly switch between multiple traction configurations, including Off-Road mode and Tow/Haul mode, to optimize powertrain calibrations, traction control settings and stability control system calibrations for a variety of terrain and driving conditions
  • The system will retain the Tow/Haul setting configurations for up to 4 hours after the vehicle is turned off, eliminating the need to reengage the system when returning from a brief stop on a long journey

ADVENTUROUS PACKAGES

X31 OFF ROAD PACKAGE

  • Off-road suspension
  • Twin-Tube Rancho®† shocks
  • Eaton®† automatic locking rear differential
  • Underbody skid plates

GOOSENECK/5TH WHEEL HITCH PACKAGE

  • Hitch platform to accept gooseneck or fifth-wheel hitch
  • Hitch platform with tray to accept ball and stamped bed holes with removable caps installed
  • Bed-mounted 7-pin trailer harness
  • Available Bed View Camera

NEXT STEPS

  • Requires Sierra 3500 HD Regular Cab Long Bed 2WD DRW with available Duramax 6.6L Turbo-Diesel V8, Max Trailering Package and gooseneck hitch. 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.

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

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

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

  • Eaton is a registered trademark of Eaton Corporation.

  • Manufacturer's Suggested Retail Price does not include freight, air conditioning charge or tire fee (if applicable). License, insurance, registration, fees associated with filing at movable property registry/PPSA, administration fees, duties and taxes extra. U.S. model shown. Dealers are free to set individual prices. See dealer for details.

  • Manufacturer's Suggested Retail Price, includes freight, $100 air conditioning tax and dealer fees. 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.

  • Requires 2WD Canyon Elevation Crew Cab short bed model with available Duramax 2.8L I4 Diesel engine, Driver Alert Package and Trailering Package. 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.

  • 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.

  • Requires 4WD SLT Crew Cab Standard Bed with available 6.2L V8 engine and Max Trailering Package. 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.

  • Requires Pro 3500 HD Regular Cab Long Bed 2WD DRW with available Duramax 6.6L Turbo-Diesel V8, Max Trailering Package and gooseneck hitch. 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.

  • Requires available Duramax® 2.8L I4 Diesel engine (late availability). 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.

  • Requires Crew Cab short box with 5.3L V8 engine. 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.

  • Requires properly equipped Sierra 3500 HD Crew Cab Long Box 4WD DRW with available Duramax 6.6L Turbo-Diesel V8 engine and fifth wheel or gooseneck hitch. 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.

  • Requires Canyon AT4 Crew Cab short bed model with cloth seats, available Duramax 2.8L I4 Diesel engine and Trailering Package. 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.

  • Requires Crew Cab short bed with 5.3L V8 engine. 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.

  • Requires properly equipped 2500 Crew Cab Standard Bed model with available 6.6L Duramax Turbo Diesel engine and fifth wheel/gooseneck hitch. 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.

  • Savana’s 4536 kg (10,000 lb.) rating requires the available 6.6L V8 engine and trailering package. 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.

  • Savana’s 4354 kg (9,600lb.) rating requires a Regular Wheelbase model, available 6.0L V8 engine and trailering package. 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.

  • Requires Sierra 3500 HD Regular Cab Long Bed 2WD DRW with available Duramax 6.6L Turbo-Diesel V8, Max Trailering Package and gooseneck hitch. 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.

  • Requires properly equipped Sierra 3500HD Crew Cab Long Box 4WD DRW with available Duramax 6.6L Turbo-Diesel V8 engine and fifth wheel or gooseneck hitch. 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.

  • Savana’s 4536 kg (10,000 lb.) rating requires the available 6.0L V8 engine and trailering package. 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.