Used 2021 GMC Yukon for Sale nearSumter, SC

How much does the 2021 GMC Yukon cost?

Prices have softened 15.23% compared to this time last year, making it a favorable time to shop this model year.

There are 2,494 listings available, which gives you a meaningful amount 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 7.7/10 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.

On the other hand, the expert review notes that tow ratings do not match the outgoing Yukon, and fuel economy can be poor. The overview also frames this Yukon as a better fit if you want a large SUV that feels more accommodating inside and more polished on the road.

With 36.4% of listings marked as good or great deals, you have some 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, trouble-free ownership experience, with language centered on the Yukon feeling luxurious, spacious, and impressive over time. That kind of response suggests buyers see it as a vehicle they can count on.

The expert review also emphasizes that the redesign improves passenger space, cargo space, ride quality, and handling, which supports the case for long-term usability. If you buy used, your main risk is choosing a poorly maintained example, so condition and service history matter.

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

Accident-free inventory is solid at 78% — always verify the vehicle history report.

You should still run a history report on every candidate and prioritize a pre-purchase inspection, especially on higher-mileage or heavily optioned examples. Focus on seat condition, cabin wear, and whether the vehicle’s equipment matches the trim level you expect.

Key things to evaluate:

• Trim level: The Yukon is offered in SLE, SLT, AT4, and Denali trims, and the base setup is the least equipped. The Denali stands apart with its exclusive dashboard design, real wood trim, leather-wrapped panels, unique stitching and piping, and available Ultimate Package, while the AT4 adds improved approach angle, skid plates, and all-terrain tires for buyers who want a more adventurous setup.
• Powertrain: Three engines are available, including a standard 355-horsepower 5.3-liter V8 on most trims, a 420-horsepower 6.2-liter V8 standard in and exclusive to Denali, and an optional 3.0-liter turbo-diesel inline six-cylinder for every Yukon except the AT4. The 6.2-liter V8 delivers robust acceleration, but fuel economy is not its strong suit.
• 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 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, while rear pedestrian alert is standard on Denali and available on SLT and AT4.
• 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 rear-seat entertainment with dual 12.6-inch displays.
• Fuel efficiency: The expert review says fuel economy can be poor, and the 6.2-liter V8 with 4WD is EPA-rated at 14 mpg city, 19 highway, and 16 combined.

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 the most sense if you want the Yukon’s space, tech, and core safety features without paying for the more upscale or specialized trims.
• SLT: This is the best-value trim for many shoppers because it adds blind-spot warning, rear cross-traffic warning, lane-departure warning, and lane-keeping assistance, making it a smarter everyday choice than the base trim.
• AT4: Choose this if you want the Yukon’s off-road-oriented hardware, including the 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 for the most upscale experience.

Rear pedestrian alert is standard on Denali and available on SLT and AT4.

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: 36.4% of listings are priced as good or great deals.
• Inventory: There are 2,494 listings available.
• Price trend: Prices have softened 15.23% compared with last year.
• Clean inventory: 78.0% of listings are accident-free.

If you find a listing below $40,604, 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 $40,604 sits slightly below last year's $47,900.

That decline suggests the market has already adjusted downward, which can help future buyers but may pressure sellers who are trying to hold firm on price. If you own one, the current trend means you may need to price competitively to move it quickly.

The Yukon’s strong owner satisfaction helps support demand, especially among shoppers who value space, comfort, and tech. 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 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, while rear pedestrian alert is standard on Denali and available on SLT and AT4.

You’ll need Denali for adaptive cruise control and enhanced automatic emergency braking that works above 50 mph. The expert review also notes that the ADAS works smoothly and subtly, which is a strong sign if you want driver assistance that stays in the background.

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:

• 36.4% of listings are priced as good or great deals.
• Accident-free inventory is solid at 78% — always verify the vehicle history report.
• Price trend: Prices have softened 15.23% compared with last year.
• Owners rate it 5/5 — a strong satisfaction signal.
• The redesign brings more passenger space, more cargo space, improved ride quality, and a significant technology upgrade.

Consider the 2022 if:

• At $45,462, the 2022 costs more than the current year's $40,604 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 stronger buy because it already delivers the redesign’s major space and tech gains at a lower average price. If you’re willing to pay more for a newer model year with a few added convenience upgrades, the 2022 is the cleaner alternative.

How does the 2021 GMC Yukon compare to the 2021 Chevrolet Tahoe?

Expert Pros & Cons (per CarGurus review team)

2021 GMC Yukon:

• Pros: Spacious third row, Powerful engine, Plenty of cargo space.
• Cons: Poor fuel economy, Uncomfortable seats, Interior materials feel cheap.

2021 Chevrolet Tahoe:

• Pros: Powerful engine, Spacious, Spacious third row.
• Cons: Poor fuel economy, Uncomfortable seats, Advanced safety features are not standard.

Our experts score the 2021 GMC Yukon 7.7/10 and the 2021 Chevrolet Tahoe 8.5/10. Both SUVs share the same basic strengths: a powerful engine, lots of space, and a roomy third row. The Tahoe gets the higher expert score, while the Yukon’s appeal leans more toward its upscale presentation and strong cargo utility.

Read our full side-by-side expert comparison here.

These recommendations are based on CarGurus' proprietary market data from November 10, 2026, CarGurus experts' opinions, and generative AI.