Used 2021 Cadillac XT6 for SaleNationwide

How much does the 2021 Cadillac XT6 cost?

Prices have softened 14.85% compared to this time last year, making it a favorable time to shop this model year.

There are 919 listings available, which gives you a solid amount of inventory to compare.

Is the 2021 Cadillac XT6 a good car?

The 2021 Cadillac XT6 is a mixed but appealing choice if you want a premium-feeling three-row SUV with a practical layout and strong feature content. It earns 3.67/5 from users and 7.5/10 from experts.

The model scores 8/10 across Look and feel, Form and function, Technology, and Safety.

It stands out as a crossover-style alternative to the larger Escalade, with high levels of refinement, broad appeal among premium SUV shoppers, a spacious third row, impressive technology, and great handling. The trade-offs are clear: advanced safety features are not standard, the stereo is lacking, and performance is fairly pedestrian.

Good and great deals account for 37.2% of listings, which suggests you have some room to shop selectively.

Is the 2021 Cadillac XT6 reliable?

The 2021 Cadillac XT6 is presented as a mostly unchanged model year, which can be reassuring if you want a familiar package rather than a fresh redesign. The expert review also describes it as a premium-feeling three-row crossover with refinement and driving confidence.

Its performance notes point to a smooth-shifting nine-speed automatic and powertrains that are adequate for everyday use, while the cost-effectiveness commentary suggests the XT6 asks a lot of money for what it delivers. Cadillac also includes a first scheduled maintenance visit at no charge.

For used buyers, the main long-term ownership risk is that a high-priced luxury SUV can become expensive to live with if you need repairs, options, or upkeep beyond the basics.

What should I look for when buying a used 2021 Cadillac XT6?

At 72.6% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.

You should run a vehicle history report before you commit, then prioritize a pre-purchase inspection that checks bodywork, electronics, and driver-assistance operation. Focus on condition and equipment consistency, especially if the listing includes expensive packages or higher-mileage use.

Key things to evaluate:

• Trim level: The Luxury trim is the entry point, while Premium Luxury and Sport add more upscale equipment and, on the higher trims, blind-spot monitoring and rear cross-traffic alert as standard. The base trim is the one most likely to leave you wanting more standard safety content.
• Powertrain: The base model uses a 2.0-liter turbo-four with 237 horsepower and 258 pound-feet of torque, while Premium Luxury and Sport use a 3.6-liter V6 with 310 horsepower and 271 pound-feet of torque. Front-wheel drive is standard, with all-wheel drive available on Luxury and Premium Luxury and standard on Sport.
• Safety package: All models include automatic emergency braking, forward-collision alert, lane-keep assist with lane-departure warning, a high-definition rearview camera, Safety Alert Seat, IntelliBeam headlights, and rear park assist. The Driver Assist Package adds adaptive cruise control, automatic seat belt tightening, enhanced automatic emergency braking, and reverse automatic braking.
• Infotainment: You get an 8.0-inch touchscreen, wireless Apple CarPlay and Android Auto, infotainment user profiles, a WiFi hot spot, six USB ports, and an eight-speaker Bose audio system. Upgrades include navigation, a 14-speaker Bose system, and upgraded wireless charging capability.
• Fuel efficiency: The 2.0-liter turbo-four is rated at 21 mpg city, 26 mpg highway, and 23 mpg combined with AWD, or 27 mpg highway with FWD. The 3.6-liter V6 with FWD returns 19 mpg city, 26 mpg highway, and 21 mpg combined, while AWD lowers city and highway figures by one mpg each and keeps the combined rating at 21 mpg.

Which 2021 Cadillac XT6 trim should I buy?

The 2021 Cadillac XT6 is offered in 3 trim levels: Luxury, Premium Luxury, and Sport.

Here's the short version:

• Luxury: This is the value play if you want the XT6’s core three-row layout, standard sunroof, wireless smartphone integration, and full base safety suite without paying for the higher-trim extras. It makes the most sense if you care more about the XT6’s space and premium feel than about added luxury content.
• Premium Luxury: This is the best-value trim for most shoppers because it adds the stronger 3.6-liter V6 and brings more upscale equipment while keeping the XT6’s broad appeal intact. It also adds standard blind-spot monitoring and rear cross-traffic alert.
• Sport: This is the trim to choose if you want the V6 plus the darker exterior treatment and the most distinctive appearance. It also comes standard with all-wheel drive and the same added safety equipment as Premium Luxury.

Premium Luxury and Sport both include lane change alert with blind-spot monitoring and rear cross-traffic alert as standard.

Is now a good time to buy a used 2021 Cadillac XT6?

This is a moderate market for selective buyers, with enough inventory and enough pricing softness to reward comparison shopping.

• Deal availability: 37.2% of listings are priced as good or great deals.
• Inventory: There are 919 listings available.
• Price trend: Prices have softened 14.85% compared with last year.
• Clean inventory: 72.6% of listings are accident-free.

If you find a listing below $26,061, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2021 Cadillac XT6's resale value?

The current average of $26,061 sits slightly below last year's $30,606.

That decline suggests the XT6 has already absorbed a meaningful amount of depreciation, which can help you as a buyer today. If you plan to resell later, the same trend means you should expect a softer exit price than an owner would have seen a year ago.

For a future seller, the upside is that the XT6 is already priced below its prior average, so the steepest early depreciation may be behind it. The downside is that luxury SUVs with heavy option content can still lose value quickly if demand softens or mileage climbs.

Is the 2021 Cadillac XT6 safe?

The 2021 Cadillac XT6 earns a five-star frontal crash test rating and a four-star rollover crash test rating from NHTSA.

It earns an 8/10 safety score from our experts.

All XT6 models come with automatic emergency braking, forward-collision alert, following-distance indicator, lane-keep assist with lane-departure warning, a high-definition rearview camera, Safety Alert Seat, IntelliBeam headlights, and rear park assist. Premium Luxury and Sport add lane change alert with blind-spot monitoring and rear cross-traffic alert as standard.

A key caveat is that the lane-keep assist and lane-departure warning systems can struggle to read lane markings until the vehicle is already over them, which weakens confidence in that part of the safety suite. Buyers who want more advanced driver assistance should pay close attention to package content.

Should I buy a 2021 Cadillac XT6 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:

• 37.2% of listings are priced as good or great deals.
• At 72.6% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 14.85% compared with last year.
• It keeps the same premium feel, spacious third row, and strong handling while staying mostly unchanged.

Consider the 2020 if:

• At $24,618, the 2020 costs less than the current year's $26,061 average.
• It offers a more approachable price and easy-to-use technology.

Consider the 2022 if:

• At $29,224, the 2022 costs more than the current year's $26,061 average.
• It brings better ride quality, stronger execution, and great safety ratings.

The bottom line: The 2021 is the right pick if you want the XT6’s premium feel, strong handling, and current-year pricing that has already softened. If you’re more price-sensitive, the 2020 is the better value path; if you want the most polished version, the 2022 is the upgrade to target.

These recommendations are based on CarGurus' proprietary market data from October 6, 2026, CarGurus experts' opinions, and generative AI.