exterior

You are currently viewing GMC.com (United States). Close this window to stay here or choose another country to see vehicles and services specific to your location.

Continue
CLOSE
Back to Menu
2021 SIERRA HEAVY DUTY 2021 SIERRA HEAVY DUTY

EXTERIOR

tbd

MOVE MOUNTAINS

Engineered to be large and in charge, the monstrous exterior of the Sierra Heavy Duty was built big so you can tow big.

HEAVY DUTY HIGHLIGHTS

TRAILERING MIRRORS
tbd
  • All Sierra Heavy Duty models are equipped with trailering mirrors
  • Sierra HD offers available trailering mirrors that power fold or manually extend and retract, LED rear guidance lamps that help enhance visibility when backing up with a trailer, lower convex mirrors, as well as amber auxiliary clearance lamps
  • Power-adjustable trailering mirrors power extend, fold and retract at the touch of a button. Available features include:
    • Heated and auto-dimming upper glass (driver and passenger)
    • LED turn-signal indicators/clearance lamps
    • LED perimeter lighting
    • LED forward auxiliary task lighting
SIDE BED STEP
tbd

The standard Side Bed Step conveniently located just in front of the rear wheel arches complements the large CornerStep rear bumper to help provide easy access when grabbing equipment from the cargo bed.

DUAL PATH AIR INDUCTION SYSTEM
tbd

The available 6.6L Duramax® Turbo-Diesel engine includes the Dual Path Air Induction System, which draws dense, cool air through both the hood scoop and the large front grille to provide cooler induction air temperatures to maximize horsepower and help optimize trailering performance.

ADVANCED LIGHTING
tbd
  • LED headlamps (high-intensity on SLT, AT4 and Denali)
  • LED taillamps
  • LED daytime running lamps
  • Available LED fog lamps (available on SLE/standard on SLT, AT4 and Denali)
  • Available LED cargo bed lighting (available on SLE/standard on SLT, AT4 and Denali)
  • Wheel molding amber arch lamps over each wheel (Only on SRW models. Available on SLE, SLT, AT4. Standard on Denali)
  • Available Roof Marker Lamps (Standard on DRW and Denali. Available on SRW)
2021 GMC Sierra HD Heavy Duty Truck trailering mirrors

TRAILERING MIRRORS

TRAILERING MIRRORS

  • All Sierra Heavy Duty models are equipped with trailering mirrors
  • Sierra HD offers available trailering mirrors that power fold and manually extend and retract, LED rear guidance lamps that help enhance visibility when backing up with a trailer, lower convex mirrors, as well as amber auxiliary clearance lamps
  • Power-adjustable trailering mirrors power extend, fold and retract at the touch of a button Available features include:
    • Heated and auto-dimming upper glass (driver and passenger)
    • LED turn-signal indicators/clearance lamps
    • LED perimeter lighting
    • LED forward auxiliary task lighting
2021 GMC Sierra HD Heavy Duty Truck side bed step

SIDE BED STEP

SIDE BED STEP

The standard Side Bed Step conveniently located just in front of the rear wheel arches complements the large CornerStep rear bumper to help provide easy access when grabbing equipment from the cargo bed.

2021 GMC Sierra HD Heavy Duty Truck Dual Path Air Induction System

DUAL PATH AIR INDUCTION SYSTEM

DUAL PATH AIR INDUCTION SYSTEM

The available 6.6L Duramax® Turbo-Diesel engine includes the Dual Path Air Induction System, which draws dense, cool air through both the hood scoop and the large front grille to provide cooler induction air temperatures to maximize horsepower and help optimize trailering performance.

2021 GMC Sierra HD Heavy Duty Truck LED Lighting

ADVANCED LIGHTING

ADVANCED LIGHTING

  • LED headlamps (high-intensity on SLT, AT4 and Denali)
  • LED taillamps
  • LED daytime running lamps
  • Available LED fog lamps (available on SLE/standard on SLT, AT4 and Denali)
  • Available LED cargo bed lighting (available on SLE/standard on SLT, AT4 and Denali)
  • Wheel molding amber arch lamps over each wheel (Only on SRW models. Available on SLE, SLT, AT4. Standard on Denali)
  • Available Roof Markers  

MADE FOR ADVENTURE

Video of 2021 GMC Sierra HD AT4 Heavy Duty Off-Road Truck MultiPro Tailgate

AT4 HIGHLIGHTS

The Sierra AT4 pairs its powerful capabilities with a bold, athletic look, delivered by way of distinctive finishes and modern, precise detailing.

AVAILABLE AT4 HIGH CLEARANCE STEP 

tbd

EXCLUSIVE EXTERIOR STYLINGS 

tbd

VERTICAL RED RECOVERY HOOKS* 

tbd

*To avoid the risk of injury, never use Recovery Hooks to tow a vehicle. For more information, see the Recovery Hooks section of your Owner's Manual.

PREMIUM DENALI FEATURES

SIGNATURE DENALI GRILLE WITH CHROME INSERTS 

tbd

 CHROME 6” ASSIST STEPS 

tbd

 CHROME VERTICAL FRONT RECOVERY HOOKS*, CHROME HANDLES AND CHROME MIRROR CAPS 

tbd

DUAL-PATH AIR INDUCTION SYSTEM WITH 6.6 DURAMAX® DIESEL V8 ENGINE 

tbd

STANDARD 20” MULTI-DIMENSIONAL POLISHED ALUMINUM WHEELS 

tbd

MULTIPRO TAILGATE WITH PUSH BUTTON PANEL AND HITCH AREA LIGHT 

tbd

*To avoid the risk of injury, never use Recovery Hooks to tow a vehicle. For more information, see the Recovery Hooks section of your Owner's Manual.

NEW DENALI BLACK DIAMOND EDITION

2021 GMC Sierra HD Heavy Duty Truck rear angle low view

FEATURED EDITION:

  • 6.6L Duramax® Turbo-Diesel V8 Engine with Allison® 10-Speed Automatic Transmission
  • Power sunroof
  • Power-retractable assist steps with LED perimeter lighting 
  • Auxiliary Trailer Camera†
  • MultiPro Audio System by KICKER®†
  • Premium all-weather floor liners with removable carpet inserts
  • Trailer Tire Pressure Monitor Sensors†
  • Unique 20" high-gloss black painted aluminum wheels 
  • Ebony Twilight Metallic exterior paint†
  • Available with 2500 and 3500 single rear wheel models

AVAILABLE GMC MULTIPRO TAILGATE

The available GMC MultiPro Tailgate offers six distinct functions designed to help improve loading, unloading and accessing the cargo box. Standard on SLE through Denali.

PRIMARY GATE
tbd

PRIMARY GATE

Open the primary gate using the key fob’s power release from inside the truck or from a button on the gate.

PRIMARY GATE LOAD STOP
tbd

PRIMARY GATE LOAD STOP

With the primary gate open, the load stop can help prevent items from sliding out of the bed.

EASY ACCESS
tbd

EASY ACCESS

The inner gate folds down for easy access when loading and unloading the bed.

FULL-WIDTH STEP
tbd

FULL-WIDTH STEP

After removing the conventional hitch, the inner gate folds into a large step for easy entry and exit from the bed (step holds up to 375 lbs).

INNER GATE LOAD STOP
tbd

INNER GATE LOAD STOP

The inner gate also includes a load stop to help prevent second-tier items from sliding out of the bed.

INNER GATE WITH WORK SURFACE
tbd

INNER GATE WITH WORK SURFACE

The opened inner gate provides a work surface as well as second-tier loading.

2021 GMC Sierra HD Heavy Duty Truck primary gate

PRIMARY GATE

PRIMARY GATE

Open the primary gate using the key fob’s power release from inside the truck or from a button on the gate.

2021 GMC Sierra HD Heavy Duty Truck primary gate load stop

PRIMARY GATE LOAD STOP

PRIMARY GATE LOAD STOP

With the primary gate open, the load stop can help prevent items from sliding out of the bed.

2021 GMC Sierra HD Heavy Duty Truck easy access

EASY ACCESS

EASY ACCESS

The inner gate folds down for easy access when loading and unloading the bed.

2021 GMC Sierra HD Heavy Duty Truck full-width step

FULL-WIDTH STEP

FULL-WIDTH STEP

After removing the conventional hitch, the inner gate folds into a large step for easy entry and exit from the bed (step holds up to 375 lbs).

2021 GMC Sierra HD Heavy Duty Truck inner gate load stop

INNER GATE LOAD STOP

INNER GATE LOAD STOP

The inner gate also includes a load stop to help prevent second-tier items from sliding out of the bed.

2021 GMC Sierra HD Heavy Duty Truck inner gate with work surface

INNER GATE WITH WORK SURFACE

INNER GATE WITH WORK SURFACE

The opened inner gate provides a work surface as well as second-tier loading.

TAILGATE LIKE A PRO

tbd

CARGO BED INNOVATIONS

2021 GMC Sierra HD Heavy Duty Truck Best-in-Class Cargo Bed Volume

BEST-IN-CLASS HEAVY DUTY CARGO BED VOLUME

  • Roll-formed high-strength steel bed
  • Best-in-class heavy-duty cargo box volume†
    • Standard Bed: 69.6 cu. ft.†
    • Long Bed: 83.5 cu. ft.†
  • 12 cargo tie-downs (500-lb. rating per corner)
  • LED Lighting
  • Available durable spray-on bedliner
2021 GMC Sierra HD Heavy Duty Truck cornerstep rear bumper

CORNERSTEP REAR BUMPER

In both corners of the rear bumper, large footwells, lined with an anti-slip texture and sized for large boots, helps make access to the cargo bed easier than ever. Standard on all Heavy-Duty models.
TECHNOLOGY & SAFETY TECHNOLOGY & SAFETY hover
TECHNOLOGY & SAFETY
INTERIOR INTERIOR hover
INTERIOR

NEXT STEPS

BUILD & PRICE BUILD & PRICE hover
BUILD & PRICE
BUILD & PRICE BUILD & PRICE hover
BUILD & PRICE
SPEC DETAILS SPEC DETAILS hover
SPEC DETAILS
SPEC DETAILS SPEC DETAILS hover
SPEC DETAILS
VIEW INVENTORY VIEW INVENTORY hover
VIEW INVENTORY
VIEW INVENTORY VIEW INVENTORY hover
VIEW INVENTORY
CLOSE
CLOSE

  • Not compatible with all trailers. See your dealer for details.

  • Non-GM warranty. Limited warranty by KICKER®, 3 years/36,000 miles, whichever comes first. For more information, contact your dealer.

  • Available on properly equipped vehicles. Required customer or third party installation. Does not monitor spare tire. Mobile app feature requires paid plan.

  • Additional charge; premium paint

  • Excludes other GM vehicles

  • Cargo and load capacity limited by weight and distribution

  • Late availability. Cargo and load capacity limited by weight and distribution

  • 7,700-lb rating requires a properly equipped 2WD Canyon Elevation Crew Cab short bed model with available Duramax 2.8L I4 Diesel engine and Trailering Package (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.

  • The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. See your GMC dealer for details. Click here to see all GMC destination freight charges.

  • Requires 4WD Double Cab with available 6.2L V8 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 properly equipped 3500 Regular Cab DRW Long Box 2WD model with available 6.6L Duramax Turbo Diesel engine 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.

  • SLE models only.

  • 7,550-lb rating requires a properly equipped 4WD Canyon Denali model with 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 oraccessories may reduce the amount you can tow.

  • Requires 2WD Denali Short Box model with 5.3L V-8 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 3500 Crew Cab DRW Long Box 4WD model with available 6.6L Duramax Turbo Diesel 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 Passenger's 9,600-lb rating requires a 2500 or 3500 Regular wheelbase model with available 6.0L V8 engine and trailering equipment 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 Cargo’s 10,000-lb rating requires  the available 6.0L V8 engine and trailering equipment 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 Cutaway’s 8,940-lb rating requires a 4500 Series 159" Wheelbase model with available 6.0L V8 engine. These maximum payload ratings are intended for comparison purposes only. Before you buy a vehicle or use it to haul people or cargo, carefully review the vehicle loading section of the Owner’s Manual and check the carrying capacity of your specific vehicle on the label on the inside of the driver’s door jamb.

  • Gross Combination Weight Rating (GCWR). 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.

  • Maximum Gross Vehicle Weight Rating (GVWR). When properly equipped; includes weight of vehicle, passengers, cargo and equipment.

  • Canyon’s 7000-lb rating requires available trailering package and 3.6L V-6 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.

  • Sierra's 12,500-lb rating requires Sierra Double Cab or Crew Cab Short box 2wd with 6.2L EcoTec3 V8 engine and NHT 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.

  • Trailer weight ratings are calculated assuming properly equipped vehicle, plus driver and one passenger. The weight of other optional equipment, passengers and cargo will reduce the trailer weight your vehicle can tow. See dealer for details.

  • Sierra Denali's 9,300-lb rating requires 2wd. 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 Passenger's 10,000-lb rating requires 2500 Wheel Base with 6.0L 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.

  • Savana Cargo's 10,000-lb rating requires 6.0L 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.

  • These maximum payload ratings are intended for comparison purposes only. Before you buy a vehicle or use it to haul people or cargo, carefully review the vehicle loading section of the Owner’s Manual and check the carrying capacity of your specific vehicle on the label on the inside of the driver’s door jamb.

  • Gross Combination Weight Rating (GCWR). When properly equipped, includes weight of vehicle, passengers, cargo and equipment.

  • Canyon’s 7700-lb rating requires 2WD Crew Cab model with available Duramax 2.8L I-4 Diesel 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 2WD Crew Cab DRW equipped with 6.6L Duramax Diesel and fifth-wheel or gooseneck hitch. Trailer weight ratings are calculated assuming properly equipped vehicle, plus driver and one passenger. The weight of other optional equipment, passengers and cargo will reduce the trailer weight your vehicle can tow. See dealer for details.

  • Starting at price for base Sierra HD. The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. See your GMC dealer for details. Click here to see all GMC destination freight charges.

  • Requires properly equipped 3500 Regular Cab DRW Long Box 2WD model with available 6.6L Duramax Turbo Diesel engine 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.

  • 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.

  • The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. See your GMC dealer for details. Click here to see all GMC destination freight charges. Bed/Roof-Mounted Bicycle Carriers shown. Requires crossbars or Thule Rack Solution. Non-GM warranty. Warranty by Thule®. See dealer for more information.

  • These maximum payload ratings are intended for comparison purposes only. Before you buy a vehicle or use it to haul people or cargo, carefully review the vehicle loading section of the Owner’s Manual and check the carrying capacity of your specific vehicle on the label on the inside of the driver’s door jamb.

  • Available. Requires 2.0L Turbocharged gas engine.

  • Terrain's 3,500-lb rating requires available 2.0L Turbocharged gas engine and available trailering equipment. 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 3.6L V6 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.

  • Yukon’s 8,500-lb rating requires short wheelbase 2wd with 5.3L EcoTec3 V8 engine and HD 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 2WD Denali Short Box model with 5.3L V-8 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.

  • Savana Cutaway’s 9,006-lb rating requires a 4500 Series 159" Wheelbase model with available 6.0L V8 engine. These maximum payload ratings are intended for comparison purposes only. Before you buy a vehicle or use it to haul people or cargo, carefully review the vehicle loading section of the Owner’s Manual and check the carrying capacity of your specific vehicle on the label on the inside of the driver’s door jamb.
close
|