Used 2021 GMC Yukon for Sale nearSumter, SC

How much does the 2021 GMC Yukon cost?

Prices have softened 14.56% compared to this time last year, making it a favorable time to shop this model year.

With 2,332 listings available, you have a solid amount of inventory to compare before you buy.

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 also described as extremely comfortable, and many owners say it stands out in its class.

The trade-offs are that the expert test drive data calls out poor fuel economy and notes that the seats can be uncomfortable, while the interior materials can feel cheap.

If you want a large SUV with a more refined and capable feel, the Yukon’s redesign gives you more passenger space, more cargo space, and a stronger technology story than before. Even so, the market still shows 36.2% good or great deals, which suggests there are opportunities if you shop carefully.

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 buyers especially appreciating the Yukon’s long-term appeal, luxurious feel, and spacious cabin. The expert test drive data also describes the SUV as capable and refined in everyday use, which supports the sense that it’s built to be counted on.

The redesign’s improved ride quality and technology help the Yukon feel more modern, and the available maintenance perk of the first scheduled maintenance visit being on the house adds a little ownership value. For used buyers, the main long-term risk is that a large, complex SUV can become expensive if prior maintenance was skipped.

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

Accident-free inventory is solid at 77.9% — always verify the vehicle history report.

You should still check the history report carefully, because a clean listing percentage does not replace a proper records review. Prioritize a pre-purchase inspection that focuses on ride quality, seat comfort, and interior condition, since those are the areas most likely to affect your day-to-day satisfaction. It also makes sense to compare trims closely, because equipment changes meaningfully across the lineup.

Key things to evaluate:

• Trim level: The SLE, SLT, AT4, and Denali each bring a different mix of refinement and equipment. The Denali stands out 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 gets a standard 420-horsepower 6.2-liter V8. A 3.0-liter turbo-diesel inline six-cylinder is also available for most versions, and the expert data says the 6.2-liter delivers robust acceleration with a ten-speed automatic.
• Safety package: Standard driver assistance 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 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. 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: Every 2021 Yukon gets a 10.2-inch touchscreen with wireless Apple CarPlay, wireless Android Auto, Amazon Alexa integration, over-the-air updates, and access to connected services. Available upgrades include 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 expert data says the 6.2-liter V8 with 4WD is EPA-rated at 14 mpg city, 19 highway, and 16 combined. Real-world testing returned 14.4 mpg on one loop and 16.2 mpg on another, so fuel costs are worth factoring into your budget.

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 if you want the redesigned Yukon’s space, tech, and core safety equipment without paying for luxury extras. It gives you the standard 10.2-inch touchscreen, wireless smartphone integration, and the Yukon’s roomy cabin, but you should expect fewer convenience and driver-assistance features than the higher trims.
• SLT: This is the best-value trim for many shoppers because it adds a meaningful safety upgrade, including blind-spot warning, rear cross-traffic warning, lane-departure warning, and lane-keeping assistance. It’s the trim to target if you want a more complete daily-driver package without jumping all the way to Denali pricing.
• AT4: Choose this if you want the Yukon’s more adventurous character. It adds the off-road-oriented hardware called out in the test-drive data, including improved approach angle, skid plates, and all-terrain tires.
• Denali: This is the luxury pick, with the exclusive dashboard design, real wood trim, leather-wrapped panels, unique stitching and piping, and the available Ultimate Package. It also gets the standard 6.2-liter V8 and the most advanced safety and convenience content.

Rear pedestrian alert is available on SLT and AT4 and comes standard on Denali, while adaptive cruise control and enhanced automatic emergency braking are Denali-only.

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 with some leverage if you’re patient.

• Deal availability: 36.2% of listings are priced as good or great deals.
• Inventory: There are 2,332 listings available.
• Price trend: Prices have softened 14.56% compared with last year.
• Clean inventory: 77.9% of listings are accident-free.

If you find a listing below $42,006, 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 $42,006 sits slightly below last year's $49,164.

That drop suggests the market has already adjusted downward, which can help you as a buyer today but may limit upside if you plan to resell soon. If you buy at the right price and keep the SUV in strong condition, you may be better positioned than someone who paid closer to last year’s average. The Yukon’s broad appeal, spacious cabin, and strong owner satisfaction should help support demand over time.

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 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. 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.

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:

• 36.2% of listings are priced as good or great deals.
• Accident-free inventory is solid at 77.9% — always verify the vehicle history report.
• Price trend: Prices have softened 14.56% 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 $46,976, the 2022 costs more than the current year's $42,006 average.
• It adds a standard 12-inch driver information center and enhanced connectivity.

The bottom line: If you want the better value, the 2021 is the smarter buy because it delivers the redesign benefits at a lower average price. If you’re willing to spend more for a slightly newer model with added connectivity and a larger driver display, the 2022 is the cleaner upgrade path. For price-sensitive shoppers, the 2021’s softer pricing and strong deal availability make it the one to target first.

These recommendations are based on CarGurus' proprietary market data from September 22, 2026, CarGurus experts' opinions, and generative AI.