2021 GMC Sierra 1500 Denali in Alliston, ON

The height of all GMC pickups in the most popular model trim in the truck lineup, the 2021 GMC Sierra 1500 Denali represents the ultimate in capability, functionality, tech and sumptuous luxury. In its spacious Crew Cab form, with a short or standard box, the Sierra 1500 Denali is the model for all light-duty pickup trucks, representing premium qualities from its engine choices to interior trim. Ernie Dean Chevrolet Buick GMC is your one-stop education and buying destination for the GMC Sierra 1500, new or used, and coming on a variety of trims like this top-of-the-line Sierra Denali model. Read on and explore to buy a 2021 GMC Sierra 1500 Denali for yourself at an excellent starting price.

Click here to explore the trim differences and to view popular packages.

Browse against other models here: 2021 Chevrolet Silverado 1500 High Country

Browse more trim pages here: Elevation

Exterior Design

MultiPro Tailgate

The GMC MultiPro tailgate is versatile to six different positions that allow for simple loading, unloading and access to your truck’s cargo bed. Utilize your Sierra Denali’s cargo box with the primary gate, primary gate load stop, easy access, full-width step, inner gate load stop and inner gate with work surface functions.

Signature Denali Features & Elements

The Sierra 1500 Denali is a luxury truck after all, and so does its elegant exterior present this. Its signature Denali grille is finished with a sparkling chrome. The chrome theme continues with chrome vertical recovery hooks, door handles and mirror caps. Even the bright dual exhaust outlets present a sophisticated finish on the Denali’s imposing rear.

Denali CarbonPro Edition

The CarbonPro Edition is available to make your Sierra Denali pickup even more unique. Its pickup bed is made from a carbon fibre composite (an industry first), also featuring 22-inch high-gloss black or chrome wheels, Head-up display, Rear Camera Mirror, 3.0L Duramax Turbo-Diesel and the MultiPro tailgate.

Denali Ultimate Package

The Denali Ultimate Package is one of the most popular packages available to be added to your Sierra Denali. Included in the package is:

  • Driver Alert Package II
  • Technology Package
  • 22-inch Multi-Dimensional Polished Aluminum wheels
  • GMC MultiPro Power Steps
  • Sunroof
  • Wheel locks
Dimensions:Sierra 1500 Denali (Crew Cab, Short Box)Sierra 1500 Denali (Crew Cab, Standard Box)
Length (mm/in)5,886 / 231.76,128 / 241.3
Width (without mirrors) (mm/in)2,063 / 81.22,063 / 81.2
Height (mm/in)1,918 / 75.51,915 / 75.4
Wheelbase (mm/in)3,745 / 147.43,987 / 157.0
Cargo Box Length (on floor) (mm/in)1,776 / 69.92,018 / 79.4
Cargo Box Width (on floor) (mm/in)1,814 / 71.41,814 / 71.4
Tailgate Width (mm/in)1,814 / 71.41,814 / 71.4
Ground Clearance (mm/in)205 / 8.1205 / 8.1
Cargo Volume (L)1,7812,030
Curb Weight (kg/lbs)2,184 / 4,8152,208 / 4,867

Wheel Options

RTL20"Multi-Dimensional Polished AluminumStandard
SMF22"Multi-Dimensional Polished Aluminum--
SF022"6 Split-Spoke Chrome Wheels$4,165
SEV22"6-Spoke Low Gloss Black (with Machined Accents$4,165
SEW22"5-Spoke Dark Silver Aluminum Wheels (with Machined Accents)$4,165
SGM22"High Gloss Black Wheels$4,165
SHD22"Black Gloss Wheels (with Chrome Accents)$4,165
SEU22"6-Split-Spoke Polished Wheels$4,165
SEZ22"Carbon Flash Metallic Wheels$4,165
SF122"Multi-Spoke Chrome Wheels$4,165
SES22"Multi-Spoke Polished Wheels$4,165

Interior Design

Unique Interior Colours & Trim

A premium luxury pickup on the outside means the same inside when it comes to your Sierra Denali, with exclusive Denali Dark Walnut/Dark Grey interiors, alongside Jet Black accents. The open-pore real ash wood trim invites even more subtle luxury elements across the cabin.

10-Way Power Adjust Front Seats & Material

The front seats present the most in comfortability, with 10-way power-adjustable features and heated and ventilated functionality, for supreme comfort during the winter or summer. Premium Forge perforated leather surfaces ensure you’re always sitting on elegant fabric. Finishing everything off is the embroidered Denali logo in the headrests.

Premium Carpet Floor Mats

Even everything down to the floor mats is of the best premium quality possible inside this GMC Sierra Denali. Along with the premium floor mats is available front and rear floor liners with removable inserts, so you can always keep your truck clean no matter the conditions you find yourself in.

Dimensions:Sierra 1500 Denali Crew Cab
Front Headroom (mm/in)1,093 / 43.0
Rear Headroom (mm/in)1,019 / 40.1
Front Legroom (mm/in)1,131 / 44.5
Rear Legroom (mm/in)1,102 / 43.4
Front Shoulder Room (mm/in)1,677 / 66.0
Rear Shoulder Room (mm/in)1,655 / 65.2
Front Hip Room (mm/in)1,554 / 61.2
Rear Hip Room (mm/in)1,530 / 60.2
Passenger Capacity5

Performance & Capability

High-Powered Powetrains

Premium engines are at your disposal, and up for you to choose from, headlined by the available 6.2L V8 and the 3.0L Duramax Turbo-Diesel as prime Sierra Denali options, both supplemented with a seamless 10-speed automatic transmission.

Sierra Denali Premium Suspension

Conquer Ontario with ease, whether the snow and ice has made winter driving a nightmare, or you’re exploring the off road in the summer on less than stable ground, your Sierra Denali 4×4 is fit to provide a confident ride. The Sierra Denali Premium suspension ensures a smooth drive no matter the terrain under your tires.

Adaptive Ride Control

Further deepening your Sierra 1500 Denali’s connection to the road, and the changing conditions that may arise, is the Adaptive Ride Control. This sensor system monitors both the road and vehicle, responding on a dime to any changes and adapting to best suit your ride.

Automatic Locking Rear Differential

When you’re on ground that you may not trust, the Automatic Locking Rear Differential on the Denali is here to come up clutch. You’ll get improved traction through the locking of the rear wheels, focusing the power where you truly need it, perfect on slippery roads or rocky terrain.

Engines:5.3L EcoTec3 V86.2L EcoTec3 V83.0L Duramax Turbo-Diesel I-6
Transmission10-speed automatic10-speed automatic10-speed automatic
Torque (lb-ft)383460460


Premium GMC Infotainment System

It’s never been simpler and easier to engage with your truck than through the Premium GMC Infotainment system. Apple CarPlay and Android Auto connectivity allow you to easily link your phone, for entertainment, navigation and more.

Head-up Display

Focus on the road but still be apprised of everything going on inside your Sierra thanks to the available 15-inch diagonal Head-up display tech. Projected in your windshield is important vehicle info like speed, audio, navigation, fuel warnings and more.

Trailer Assist Features

The Sierra 1500 has been even more enhanced for its 2021 model year with exceptional towing tech that helps support the power of the engine. Camera angles like bed view, rear trailer view and rear side view give you a one-of-a-kind look at your cargo, so you can keep tabs on your precious trailer at all times


Front & Rear Park Assist

Even experienced drivers may sometimes find it hard to perfectly position the large body of your Denali in your desired parking spot, but that’s where Front & Rear Park Assist comes into play. It’ll alert you of objects in front or behind you, so you can perfectly situate your truck without bumping into anything.

Adaptive Cruise Control

Thanks to the camera sensor on board, you can set a gap distance from the vehicle in front of you and have your pickup maintain the distance, all you have to do is steer when required. This Adaptive Cruise Control means less braking and less accelerating when you’re on a long highway trip.

Teen Driver

What better way for your kid to learn how to drive than in a Sierra Denali! The truck is specifically made for such a thing, with the Teen Driver system that promotes safe driving through automatic safety features and set limits. A report card is even produced so your new driver can be coached on exactly what they need to work on.

2021 Sierra 1500 Denali Model Trim

Front side view of 2021 GMC Sierra 1500 Denali


Starting at $69,398*

Highlighted features:

  • 2L V8, 3.0L Duramax Turbo Diesel (available)
  • MultiPro tailgate
  • 15 available camera views
  • Adaptive Cruise Control (available)
  • Head-up display (available)
  • Standard Continuous Damping Adaptive Ride Control
  • CarbonPro Edition
View Denali Inventory

Ernie Dean is here for you in Alliston for all of your truck needs. We consider ourselves Truckville in Ontario, where we’re not just here to sell you a truck, but to help educate you and answer any questions you may have on our wide inventory of new and used pickups. For all your truck needs, from learning to buying to service to parts and more, reach out to us and we’d be happy to assist!

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