2021 GMC Sierra 1500

Loaded inside the 2021 GMC Sierra 1500 is a host of awe-inspiring performance and off-road features, as well as advanced safety and tech systems, all wrapped up inside an elegant package, both inside and out. This light-duty pickup remains the crown jewel of the GMC lineup for a reason, from its base trim to the legendary Denali, it provides all you could ever want out of a modern pickup. Gus Brown Buick GMC here in Port Perry is your top new and pre-owned destination for the wonder and tough-working ability that every Sierra presents. Learn more about this iconic pickup truck now, then explore it in our inventory for sale, starting at a terrific base price.

Exterior Design

SLE & SLT Features

Even on the lower level Sierra 1500 trims, they represent the great heights that GM has reached with their pickup truck designs. Pushing forth an exterior that is both pleasing to the eye, but always hinting at its raw performance power. The SLE & SLT comes with these highlighted elements:

  • 20-inch black wheels
  • Monochromatic exterior
  • Black grille, body colour surrounds
  • Vertical recovery hooks
  • LED cargo box lighting

AT4’s Tough Look

If you’re one to lean toward a pickup’s rugged and adventurous side more than its sleek, modern profile, then the AT4 is the trim for you. This model is ready for action, and comes with these highlighted elements:

  • 2-inch factory-installed suspension lift
  • Dark, classy accents
  • Dual exhaust outlets
  • Vertical red recovery hooks
  • Exclusive off-road tires
  • CarbonPro Edition (available)

Denali High Premium Design

Like all of the GMC lineup, the Denali trim offers the height of what’s offered in your desired model, and the Sierra 1500 is the prime example of these illustrious design elements.

  • Signature grille
  • Chrome vertical recovery gooks, door handles, mirror caps
  • Premium LED lighting
  • MultiPro assist steps (available)
  • Denali CarbonPro Edition

Tailgate & Cargo Bed

Being a pickup means incredible work and effort has gone into perfecting the tailgate and cargo bed, ensuring a seamless experience no matter the job that needs to be done. The MultiPro tailgate is able to be set in six different positions to adapt to your needs, making loading and unloading easier than ever. The durable cargo bed comes with a spray-on bedliner, 12 tie-downs, available lighting, available audio system and a handy cornerstep rear bumper.

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

Interior Design

Style & Comfort

The interior of a 2021 GMC Sierra 1500 molds function with style and comfort, so you can do all you want to do, and do so in class. Sound-absorbing tech drowns out the outside noise, so you can really relax in the class-leading Crew Cab front head and leg room space. Balanced with driver-focus up front, from an available leather-wrapped steering wheel to honed lighting, and rear seat features like heated availability, copious space and large door openings will make anyone in your truck feel like riding in first-class.


Just as the cargo bed in the exterior can take on all your gear, don’t underestimate all of the versatile storage options inside of the pickup. Whether it be the front centre console storage with a lockable vault, the rear seatback storage or the under-seat options for tools and sports equipment alike. No matter the gear, your Sierra 1500 will welcome it aboard with safety and security.

AT4 Sporty Interior

As ready for fun as the AT4 is on the outside, so is it inside as well, with fine detail finishes and accents that truly round it out as a pickup ready for adventure.

  • Jet Black interior, Kalahari accents
  • Technical aluminum dark-finish detailing
  • Embroidered AT4 badging
  • Heated & ventilated front leather seats
  • 10-way power adjust bucket seats
  • Premium front and rear floor liners

Denali Luxurious Interior

The tops of elegance for your Sierra, the Denali trim provides a host of luxurious accents inside.

  • Jet Black, Denali Dark Walnut/Dark Ash Grey interior
  • Open-pore real ash wood trim
  • Premium Forge perforated leather seats
  • 10-way power adjust front seats
  • Premium headrests with Denali logo
  • Premium carpet floor mats
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

Engine Efficiency

There’s a host of engine options, depending on your trim, but what they all have in common is delivering exceptional efficiency along with their power. The Dynamic Fuel Management system on the 5.3L V8 and 6.2L V8 lets you engine have 17 different patterns it can utilize between 2 and 8 cylinders, getting you the best power or efficiency needed. Those with the 10-speed automatic transmission see it with closer gear spacing so the engine can much more accurately operate in its best range given what the conditions demand.

AT4 & Denali Capability

Want the most capability features and performance benefits that the Sierra 1500 can produce? The AT4 and Denali trims deliver top tier power and systems to make the toughest drive that much more easier.

  • AT4
    • Factory-installed 2-inch suspension lift
    • Automatic locking rear differential
    • Hill Descent Control
    • Skid plates
    • Available technology package
    • Standard all-terrain tires
    • Available mud terrain tires
  • Denali
    • Denali premium suspension
    • Available Duramax 3.0L Turbo-Diesel
    • Available 6.2L EcoTec V8
    • Automatic Locking Rear Differential

Diesel Technology

If you love driving a diesel, the 2021 Sierra welcomes you in with open arms. Powerful and incredibly efficient, familiarize yourself with all of the diesel tech and features found inside this truck.

  • Duramax 3.0L turbo engine
  • Active thermal management
  • Start/stop technology
  • A quiet engine for a seamless drive


Trailering Systems

If you’re interested in a 2021 GMC Sierra 1500, most likely you’re interested in towing with it as well. GM knows how important these functionalities are, from their performance to active safety, so with the ProGrade trailering system and the added trailering assist features present, you’ll enjoy a towing experience life few others in the past. From an in-vehicle trailering app to smart trailer integration, alongside bed and trailer views, with an available Jack-Knife Alert, you’re always covered from all angles.


Connect with those who matter to you and your vehicle, all with the helpful technology on board. From the GMC infotainment system, allowing you to easily link up your phone through Apple CarPlay and Android Auto, to the 8-inch digital driver information centre that keeps you apprised of the Sierra’s most important info. You’ll be driving with a better connection to your truck, and the outside world.

15 Camera Views

Get a full picture of your truck and trailer thanks to the HD Surround Vision, Rear Camera Mirror and Bed View camera. Up to 15 different camera views are available through these systems, allowing you to keep tabs on every aspect of your cargo.


Adaptive Cruise Control

A camera sensor in your pickup will monitor the space in front of you and keep you at a specific gap distance from the vehicle in front of you. All you have to do is steer, eliminating those constant needs to brake and accelerate when you’re out on the highway on a long trip.

Front & Rear Park Assist

Even veteran truck drivers can sympathize with fitting the big body of your pickup into a parking spot, and doing so avoiding obstacles at the same time. The front and rear park assist gives you distance alerts when you might be close to hitting an object, and helps you avoid the potential for any low-speed parking lot collisions.

Forward Collision Alert

This available safety technology is always monitoring ahead of your truck, alerting you of a potential front-end collision so you can take swift action to avoid it. A tailgating alert is also featured, letting you know if you’re following the ahead vehicle just a bit too closely.

2020 GMC Sierra 1500 Model Changes

The big additions in 2021 for the Sierra 1500 over the 2020 include a host of trailer system add-ons that serve to make your next towing trip that much more convenient. Added is the Trailer Length Indicator, Jack-Knife Alert, Cargo Bed View with zoom, Hitch Guidance and with upgrades on both the Rear Trailer and Rear Side views. This is all in addition to the Sierra’s already robust lineup of towing features, cementing it as your top pickup choice for trailering.

2021 Sierra 1500 Model Trims

Front side view of GMC Sierra 1500 in red

Sierra (Base)

Starting at $44,298*

Highlighted features:

  • Front/rear chrome bumper
  • StabiliTrak, with traction control
  • Vertical recovery hooks
  • Duralife brake rotors
View Sierra (Base) Inventory
Front side view of GMC Sierra 1500 SLE, Elevation, SLT


Starting at $52,398*

Highlighted features:

  • Best-in-class crew cab front head/leg room
  • Six-Function MultiPro tailgate
  • ProGrade trailering system
  • LED headlights
View SLE Inventory
Front side view of GMC Sierra 1500 SLE, Elevation, SLT


Starting at $55,698*

Highlighted features:

  • Six-Function MultiPro tailgate
  • ProGrade trailering system
  • Large cargo bed area
  • LED headlights
View Elevation Inventory
Front side view of GMC Sierra 1500 SLE, Elevation, SLT


Starting at $60,298*

Highlighted features:

  • Six-Function MultiPro tailgate
  • 15 available camera views
  • Premium, heated leather-appointed outboard seating
  • ProGrade trailering system
View SLT Inventory
Front side view of GMC Sierra 1500 AT4


Starting at $66,998*

Highlighted features:

  • Unique exterior design, black chrome accents
  • Sporty interior, premium interior
  • 2-inch factory-installed suspension lift
  • CarbonPro Edition (available)
View AT4 Inventory
Front side view of GMC Sierra 1500 Denali


Starting at $69,998*

Highlighted features:

  • 2L V8 (available)
  • Six-Function Multi-Pro tailgate
  • Continuous Damping Adaptive Ride Control
  • CarbonPro Edition (available)
View Denali Inventory

For 13+ years, we’ve been happy to serve the Durham region with the best in GM vehicles. Whether you’re shopping for a new or pre-owned truck like this Sierra 1500, need quality service, parts or collision repair, we’re always here for you. If you have any questions about this pickup, or our dealership, please don’t hesitate to contact us!


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