2021 GMC Sierra 1500

2021 GMC Sierra 1500 at Gus Brown Buick GMC in Whitby, Ontario

Don’t let the light-duty tag fool you, the 2021 GMC Sierra 1500 offers up heavy duty performance thanks to a number of best-in-class and first-in-class attributes. From its rugged aesthetic appeal to its range of powertrains and advanced features, the 2021 Sierra 1500 conquers tough terrain from the jobsite to the campsite—and every road in between. Learn more about this exceptionally capable truck with your source for all things automotive in Whitby, Ontario: Gus Brown Buick GMC!

Exterior Design

The 2021 GMC Sierra 1500 sets the stage, thanks to its rugged and intimidating exterior design. Starting with a set of bright, signature C-shaped LED headlamps flanking a bold grille, the Sierra combines utility with style to great effect—while small details like the chrome accents on the SLE and SLT trims help this pickup shine even brighter. For those looking to spend their time on tough, off-road terrain, the Sierra 1500 Elevation both looks and acts the part thanks to vertical recovery hooks, 20” wheels, as well as the available X31 Off-Road package offering an integrated dual exhaust and all-terrain tires. The black chrome grille of the AT4 trim ramps up the off-road style of the 2021 Sierra courtesy of its fog lamp surrounds and body-colour bumpers, along with a factory-installed 2-inch suspension lift kit. However, none of these models can match the luxury of the 2021 Sierra 1500 Denali, or its bright chrome grille insert, recovery hooks, and mirror caps. No matter which trim you choose, the available industry-first GMC MultiPro™ Tailgate and its six different functions make loading and unloading the Sierra easier than ever.

Interior Design

Thanks to incredibly thoughtful design, the 2021 GMC Sierra 1500 offers up a wealth of interior space and comfort—not to mention a highly intuitive driving experience. Choose the Sierra 1500 Crew Cab and you’ll be treated to class-leading head and leg room up front, while the sound-absorption technology found in the 2021 Sierra’s dash, carpet, and triple-sealed doors provide an exceptionally quiet ride no matter what’s going on outside. There’s no shortage of comfort for your passengers in the rear seats, thanks to large door openings, tons of rear-seat leg room, an almost flat floor, and available heated rear outboard seats. Of course, GMC saves the best for the driver, which is why controls are laid out in an efficient and clever manner, and extras like an available leather-wrapped steering wheel add both comfort and luxury. Smart storage options like the available rear under-seat storage or available rear seatback storage provide a home for your smaller personal goods, making the 2021 GMC Sierra more than just a pretty face.


Not only does the 2021 GMC Sierra 1500 offer an incredible blend of ruggedness and luxury, it also offers some seriously advanced technology features—starting with the available and intuitive GMC Infotainment System on a multicolour 8-inch diagonal touch-screen. Compatible with Apple CarPlay® and Android Auto, and featuring Advanced Navigation as well as doubling as an available 4G LTE Wi-Fi® Hotspot, this system turns your Sierra into a command centre on wheels! Add in the available, first-in-class 15-inch diagonal multicolour Head-Up Display and you’ll get all the most pertinent information superimposed right on your windshield, allowing you to keep your eyes on the road at all times. For those using their 2021 Sierra to tow, the available ProGrade™ Trailering System is composed of an array of intelligent trailering tech, allowing you to hitch and tow with unparalleled ease. An in-vehicle Trailering App allows you to create custom trailer profiles and statuses so you can monitor things like tire pressure and temperature, along with the available trailering assist features like Bed View with Zoom and Hitch Guidance, Jack-Knife Alert, Rear Trailer View, and Rear Side View.

Performance & Efficiency

Performance is a huge part of what separates the 2021 GMC Sierra from other light-duty trucks, and that begins with a choice of five different, powerful—and efficient—engines. It all starts with the 4.3L EcoTec3 engine found at the base level, capable of producing 285 horses and 305 lb-ft of torque, with each engine becoming more powerful than the one before it. A 2.7L Turbo with Active Fuel Management gives the Sierra 1500 310 horsepower and 348 lb-ft of torque to work with, while the 5.3L EcoTec3 V8 takes that performance even further with 355 horses and 383 lb-ft of torque. The two top engine choices, a 6.2L EcoTec3 V8 and Duramax® 3.0L Turbo-diesel, both provide exceptional torque at 460 lb-ft—with the former offering a hefty 420 horsepower, and the latter providing exceptional efficient towing.

Three different automatic transmissions—ranging from 6-, 8-, or 10-speeds—allow the 2021 Sierra to harness all that engine power in an incredibly efficient manner, with the 2WD diesel offering posting an astounding estimated fuel efficiency number of just 7.8 L/100 km on the highway.


Keeping you safe behind the wheel of the 2021 GMC Sierra 1500 is an array of standard and available advanced driver assistance and safety technology, providing you with the confidence to handle whatever the road throws your way. Available Adaptive Cruise Control allows you to set a gap time from the vehicle ahead of you, maintaining that gap so you can brake and accelerate less while on the highway, while the available Following Distance Indicator displays the difference in time between you and the vehicle ahead. The available IntelliBeam® Auto High Beams automatically turn your high-beam headlamps on and off according to the other vehicles on the road, while the available Automatic Emergency Braking works with the Forward Collision Alert system to help avoid front-end collisions by either assisting the driver’s braking or braking for you.

2021 GMC Sierra 1500 Trim Levels


GMC Sierra 1500 SLE & SLT:

Starting at $32,498
  • Best-in-class crew cab front head and legroom (max)
  • LED headlamps
  • Available six-function MultiPro™ Tailgate
  • Available ProGrade™ Trailering System w/ in-vehicle Trailering App
Build & Price a GMC Sierra 1500

GMC Sierra 1500 Elevation:

Starting at $46,798
  • Monochromatic look w/ black grille and vertical recovery hooks
  • 20” gloss black painted-aluminum wheels
  • Keyless open and start
  • LED cargo box lighting
Build & Price a GMC Sierra 1500

GMC Sierra 1500 Sierra AT4

Starting at $60,898
  • 2-inch factory-installed suspension lift
  • Standard six-function MultiPro™ Tailgate
  • Exclusive interior
  • Black chrome accents
Build & Price a GMC Sierra 1500

GMC Sierra 1500 Denali

Starting at $62,298
  • Standard six-function MultiPro™ Tailgate
  • Continuous damping Adaptive Ride Control
  • Available first-in-class 15-in. diagonal Head-Up Display & Rear Camera Mirror
  • Available CarbonPro Edition w/ carbon fibre bed
Build & Price a GMC Sierra 1500

Thanks to a laundry list of both best- and first-in-class attributes, a choice of several high-performance powertrains, and a ton of standard and available advanced safety and technology systems, it’s no wonder the 2021 GMC Sierra 1500 is at the head of its class—its rugged good looks and spacious interior is just a bonus! Find the right GMC Sierra 1500 for your needs today at Gus Brown Buick GMC in Whitby, Ontario.