Used 2021 GMC Yukon for Sale near Ontario

How much does the 2021 GMC Yukon cost?

Prices have softened 13.54% compared to this time last year, making it a favourable time to shop this model year.

There are 67 listings available, which suggests a modest amount of inventory for you to compare.

Is the 2021 GMC Yukon a good car?

Yes — the 2021 GMC Yukon earns a 5/5 user rating and a 7.67/10 expert rating. The model scores 9/10 across Look and feel, Technology, and Safety.

Owners consistently praise the luxurious feel, spacious interior, and impressive tech features. They also describe the ride as extremely comfortable, and many say it stands out in its class. That lines up well with the Yukon’s use case as a full-size SUV for buyers who want space, comfort, and a premium-feeling cabin.

With 29.9% of listings marked as good or great deals, you have a decent chance of finding a competitively priced example.

Is the 2021 GMC Yukon reliable?

Owners rate it 5/5, a strong signal of long-term satisfaction.

The owner feedback points to a dependable, trouble-free ownership experience, with people highlighting the Yukon’s strong overall appeal and comfort over time. The expert review also supports that impression by describing the SUV as a substantial, well-rounded redesign that improves the areas buyers care about most.

GMC also adds useful ownership-friendly technology and convenience features, which can help the Yukon feel easier to live with day to day. For used buyers, the main long-term risk is that a large, complex SUV can be costly to keep in top shape if it has been neglected.

What should I look for when buying a used 2021 GMC Yukon?

Key things to evaluate:

• Trim level: The SLE, SLT, AT4, and Denali each bring a different mix of equipment and character. The Denali stands apart with its exclusive dashboard design, real wood trim, leather-wrapped panels, unique stitching and piping, and available Ultimate Package features such as a panoramic sunroof. The AT4 is the off-road-focused choice with improved approach angle, skid plates, and all-terrain tires.
• Powertrain: You can find a standard 355-horsepower 5.3-litre V8 on most trims, a 420-horsepower 6.2-litre V8 standard on Denali, and an optional 3.0-litre inline six-cylinder turbo-diesel on every Yukon except the AT4. The 6.2-litre V8 delivers strong acceleration, but it is not the most efficient choice.
• Safety package: Standard equipment includes forward collision warning, daytime pedestrian detection, automatic emergency braking below 80 km/h, automatic high-beam headlights, Teen Driver, a rear-seat reminder, and automatic crash response and crisis assistance through OnStar. Starting with SLT, you also get blind-spot warning, rear cross-traffic warning, lane-departure warning, and lane-keeping assistance. Rear pedestrian alert is available on SLT and AT4 and standard on Denali, while adaptive cruise control and enhanced automatic emergency braking are reserved for Denali.
• Infotainment: All 2021 Yukons get a 10.2-inch touchscreen with wireless Apple CarPlay, wireless Android Auto, and over-the-air updates. Higher trims add wireless device charging, navigation, a 14-speaker Bose Performance Series audio system, and a rear-seat media system with dual 12.6-inch displays.
• Fuel efficiency: The 6.2-litre V8 with 4WD is rated at 16.8 L/100 km in the city, 12.4 on the highway, and 14.8 combined. In testing, the same setup returned 16.3 L/100 km on one loop and 14.5 L/100 km on another. The review also notes that some fuel-efficiency figures worsen versus the previous generation.

Which 2021 GMC Yukon trim should I buy?

The 2021 GMC Yukon is offered in 4 trim levels: SLE, SLT, AT4, and Denali.

Here's the short version:

• SLE: This is the entry point, so it makes sense if you want the Yukon’s space and core tech without paying for the more luxurious or specialised trims. It still gets the standard infotainment and safety basics, which makes it the value-minded starting point.
• SLT: This is the best-value trim for many shoppers because it adds a meaningful safety upgrade over SLE, including blind-spot warning, rear cross-traffic warning, lane-departure warning, and lane-keeping assistance. If you want a more complete daily-driver package, this is the trim to target.
• AT4: Choose this if you want the Yukon’s off-road-oriented setup. It adds improved approach angle, skid plates, and all-terrain tires, making it the right fit if rougher terrain matters to you.
• Denali: This is the luxury pick, with its exclusive interior design, real wood trim, leather-wrapped panels, unique stitching and piping, and the strongest engine choice. It also gets rear pedestrian alert standard, plus adaptive cruise control and enhanced automatic emergency braking.

The safety-package trim note is simple: the most advanced driver-assistance features are concentrated in SLT and above, with Denali getting the fullest set.

Is now a good time to buy a used 2021 GMC Yukon?

This looks like a moderate, selective buyer’s market, so you can shop carefully and still find worthwhile opportunities.

• Deal availability: 29.9% of listings are priced as good or great deals.
• Inventory: There are 67 listings available.
• Price trend: Prices have softened 13.54% compared with last year.

If you find a listing below $56,261 CAD, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2021 GMC Yukon's resale value?

The current average of $56,261 CAD sits slightly below last year's $65,075 CAD.

That price movement suggests the market has already adjusted downward, which can make the Yukon more attractive to used buyers today. For a future seller, it means you may need to price competitively if you want to move the vehicle quickly.

The Yukon’s strong equipment, premium feel, and broad appeal should help it remain desirable, especially in well-kept trims like SLT and Denali. Still, resale will depend heavily on condition, mileage, and how well the truck has been maintained.

Vehicles with strong owner satisfaction ratings, like this model year's 5/5, tend to retain buyer demand, which supports resale value over time.

Is the 2021 GMC Yukon safe?

The 2021 GMC Yukon earns a 9/10 safety score from our experts.

Standard features include forward collision warning, daytime pedestrian detection, automatic emergency braking below 80 km/h, automatic high-beam headlights, Teen Driver, a rear-seat reminder system, and automatic crash response and crisis assistance through OnStar. Starting with SLT trim, you also get blind-spot warning, rear cross-traffic warning, lane-departure warning, and lane-keeping assistance. Rear pedestrian alert is available on SLT and AT4 and comes standard on Denali, while adaptive cruise control and enhanced automatic emergency braking are reserved for Denali.

The safety package is strongest on higher trims, so if advanced driver assistance matters to you, you should focus on SLT or Denali. The review also notes that crash-test ratings were unavailable at the time it was written.

Should I buy a 2021 GMC Yukon or consider a different year?

If you're weighing the 2021 against nearby model years, here's how to think about it:

Choose the 2021 if:

• 29.9% of listings are priced as good or great deals.
• Price trend: Prices have softened 13.54% compared with last year.
• Owners rate it 5/5 — a strong satisfaction signal.
• The redesign brings more passenger space, more cargo space, and a major technology upgrade.

Consider the 2022 if:

• At $62,973 CAD, the 2022 costs more than the current year's $56,261 CAD average.
• It adds a standard 12-inch driver information centre and enhanced connectivity.

The bottom line: You should lean toward the 2021 if you want the redesigned Yukon at a lower average price and with strong owner satisfaction. If you are more price-sensitive, the 2021 is the smarter buy; if you want the newer-year updates and do not mind paying more, the 2022 is the alternative to compare.

These recommendations are based on CarGurus' proprietary market data from September 15, 2026, CarGurus experts' opinions, and generative AI.