Used 2021 GMC Yukon for Sale nearMilwaukee, WI

How much does the 2021 GMC Yukon cost?

Prices have softened 14.36% compared to this time last year, making it a favorable time to shop this model year.

There are 2,371 listings available, which gives you a solid pool of inventory 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. The ride is described as extremely comfortable, and many owners say it stands out in its class.

The trade-offs are that the Yukon can be expensive in Denali form, and the expert review notes that tow ratings trail the outgoing model while fuel economy can worsen in some cases.

For you, that means the Yukon makes the most sense if you want a large SUV with a refined cabin, strong presence, and family-friendly space rather than the cheapest full-size option. With 36.1% of listings marked as good or great deals, there is still room to shop selectively.

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-feeling SUV with a luxurious cabin, spacious interior, and tech that leaves a strong impression over time. That kind of repeat praise usually matters most when you’re trying to judge whether a used SUV will feel trustworthy after the first owner’s honeymoon period.

The expert review also describes the Yukon as a substantial, capable redesign with improved ride quality and handling, which supports the sense that it was built to be a long-term family hauler. The maintenance and ownership picture is helped by the model’s modern tech and broad feature set, though you should still expect higher running costs than a smaller SUV.

For used buyers, the main long-term risk is less about basic durability and more about finding one that has been maintained well and not worn hard by towing or heavy family use.

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

Accident-free inventory is solid at 78.2% — always verify the vehicle history report.

You should still run a history report on any candidate, because a clean listing percentage does not replace a vehicle-specific check. Prioritize a pre-purchase inspection if you’re looking at a higher-mileage example or one with towing use. Focus on seat condition, interior wear, and how well the tech and driver-assistance features operate, since those are the areas most likely to affect day-to-day satisfaction.

Key things to evaluate:

• Trim level: The Yukon is available in SLE, SLT, AT4, and Denali trim levels. The Denali stands apart with its exclusive dashboard design, real wood trim, leather-wrapped panels, unique stitching and piping, and available panoramic sunroof, while the AT4 is the off-road-focused choice with improved approach angle, skid plates, and all-terrain tires. The SLT is the first trim to add blind-spot warning, rear cross-traffic warning, lane-departure warning, and lane-keeping assistance, so base-trim shoppers should pay close attention to feature gaps.
• Powertrain: You get a standard 355-horsepower 5.3-liter V8 on all but the Denali, while the Denali uses a 420-horsepower 6.2-liter V8. A 3.0-liter turbo-diesel inline six-cylinder is also offered for most versions, and the expert review notes that the 6.2-liter delivers robust acceleration but not strong fuel economy.
• Safety package: Standard equipment includes forward collision warning, daytime pedestrian detection, automatic emergency braking below 50 mph, automatic high-beam headlights, Teen Driver, a rear-seat reminder, and OnStar-based crash response and crisis assistance. Starting with SLT, you also get blind-spot warning, rear cross-traffic warning, lane-departure warning, and lane-keeping assistance. Adaptive cruise control and enhanced automatic emergency braking are reserved for Denali.
• Infotainment: Every 2021 Yukon gets a 10.2-inch touchscreen with wireless Apple CarPlay, wireless Android Auto, Amazon Alexa integration, GMC Connected Services, and over-the-air updates. Higher trims can add wireless device charging, navigation, a 14-speaker Bose audio system, and rear-seat media with dual 12.6-inch screens.
• Fuel efficiency: The expert review says the 6.2-liter V8 in 4WD form is EPA-rated at 14 mpg city, 19 highway, and 16 combined, and testing returned 14.4 mpg on one loop and 16.2 mpg on another. The review also notes that fuel economy can 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, tech, and core capability without paying for luxury extras. It gives you the standard powertrain and infotainment setup, but you should expect the fewest convenience and safety upgrades.
• SLT: This is the best-value trim for many shoppers because it adds the first major safety upgrades, including blind-spot warning, rear cross-traffic warning, lane-departure warning, and lane-keeping assistance. If you want a more complete daily-driver package without jumping to Denali pricing, this is the trim to target.
• AT4: Choose this if you want the Yukon’s more adventurous character, since it adds improved approach angle, skid plates, and all-terrain tires. It is the trim to consider if your priorities lean toward rougher roads and a more rugged setup.
• Denali: This is the luxury pick, with the exclusive dashboard design, real wood trim, leather-wrapped panels, unique stitching and piping, and the available panoramic sunroof. It also gets the 420-horsepower 6.2-liter V8 and the most advanced safety content, including adaptive cruise control and enhanced automatic emergency braking.

The safety-package step-up starts with SLT, while Denali brings the most complete driver-assistance setup.

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 listings.

• Deal availability: 36.1% of listings are priced as good or great deals.
• Inventory: There are 2,371 listings available.
• Price trend: Prices have softened 14.36% compared with last year.
• Clean inventory: 78.2% of listings are accident-free.

If you find a listing below $41,907, 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 $41,907 sits slightly below last year's $48,936.

That price movement suggests the market has already adjusted downward, which can help you as a buyer but may pressure future resale if you overpay today. If you buy near the current average or below, you reduce the chance of taking an immediate depreciation hit.

For a future seller, the key is to keep the vehicle in strong condition and avoid examples with obvious wear, since buyers in this segment tend to reward clean, well-kept SUVs. The Yukon’s broad appeal and strong feature set should help demand stay healthy if the truck is presented well.

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 safety equipment includes forward collision warning, daytime pedestrian detection, automatic emergency braking below 50 mph, automatic high-beam headlights, Teen Driver, a rear-seat reminder, and OnStar-based crash response and crisis assistance. Starting with SLT trim, you also get blind-spot warning, rear cross-traffic warning, lane-departure warning, and lane-keeping assistance. Denali adds adaptive cruise control and enhanced automatic emergency braking that works above 50 mph.

The safety setup is broad and well layered, but the biggest trim-level gap is that the more advanced driver-assistance features are not standard on the lower trims. If you want the fullest safety package, Denali is the trim to target.

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:

• 36.1% of listings are priced as good or great deals.
• Accident-free inventory is solid at 78.2% — always verify the vehicle history report.
• Price trend: Prices have softened 14.36% compared with last year.
• Owners rate it 5/5 — a strong satisfaction signal.
• The redesign brings more space, better ride quality, and a major technology upgrade.

Consider the 2022 if:

• At $46,885, the 2022 costs more than the current year's $41,907 average.
• It adds a standard 12-inch driver information center and enhanced connectivity.

The 2021 is the better buy if you want the redesigned Yukon at a lower entry price and can live without the 2022’s added display and connectivity upgrades. If you’re price-sensitive, the 2021 gives you the stronger value play; if you want the newer tech touches and don’t mind paying more, the 2022 is the cleaner step up.

These recommendations are based on CarGurus' proprietary market data from September 29, 2026, CarGurus experts' opinions, and generative AI.