Used 2021 GMC Yukon XL for Sale nearPhiladelphia, PA

Compare 2021 GMC Yukon XL Trims in Philadelphia, PA

The 2021 GMC Yukon XL offers a range of trims from budget-friendly options to luxury models, all featuring 4WD for versatile driving.

• Starting at $34,999
• Best MPG/MPGe: 15 city / 19 hwy
• Most Popular: Denali 4WD

Trim Overview

Prices updated weekly from CarGurus listings.

Quick Compare Table

Listing prices sourced from CarGurus — updated weekly. OEM specs from manufacturer data.

Missing data displayed as "—".

Trim Deep Dives

SLE 4WD — "Who It's For"

The SLE 4WD is the pick for shoppers who want essential features without paying for luxury upgrades.

• Avg. market price: $34,999 (updated weekly)
• MPG/MPGe: 15 city / 19 hwy
• Inventory: 6 listings — lower availability; may limit negotiating room
• View SLE 4WD listings

SLT 4WD — "Who It's For"

The SLT 4WD is the pick for shoppers who want a blend of comfort and capability without stepping up to the Denali.

• Avg. market price: $40,697 (updated weekly)
• MPG/MPGe: 15 city / 19 hwy
• Inventory: 20 listings
• View SLT 4WD listings

AT4 4WD — "Who It's For"

The AT4 4WD is the pick for shoppers who want off-road capability with added luxury features.

• Avg. market price: $41,462 (updated weekly)
• MPG/MPGe: 15 city / 19 hwy
• Inventory: 11 listings — lower availability; may limit negotiating room
• View AT4 4WD listings

Denali 4WD — "Who It's For"

The Denali 4WD is the pick for shoppers who want the ultimate luxury experience in a full-size SUV.

• Avg. market price: $37,180 (updated weekly)
• MPG/MPGe: 13 city / 19 hwy
• Inventory: 44 listings
• View Denali 4WD listings

Trim Recommendations

Most Popular — Denali 4WD

With 44 active listings, the Denali 4WD is the clear volume leader in the lineup.

Browse Denali 4WD listings

Best Budget Option — SLE 4WD

At $34,999 avg market price — below the lineup median of $38,938 — it's the most accessible entry point.

Browse SLE 4WD listings

Best for Fuel Economy — SLE 4WD

The SLE 4WD offers the best fuel economy in the lineup at 15/19 MPG.

Browse SLE 4WD listings

These recommendations are based on CarGurus' proprietary market data from November 5, 2026, CarGurus experts' opinions, and generative AI.

How much does the 2021 GMC Yukon XL cost?

Prices have softened 14.78% compared to this time last year, making it a favorable time to shop this model year.

There are 1,585 listings available, which gives you a solid amount of inventory to compare before you buy.

Is the 2021 GMC Yukon XL a good car?

Yes — owners rate it 5/5, which is a strong signal that it delivers on what shoppers want in a large SUV. The review summary repeatedly points to its luxury feel, spacious interior, and comfort on long trips, and it also highlights the powerful engine and surprising agility for something this size. That lines up well with its role as a full-size SUV built for family duty, towing, and long-distance comfort. With 35.6% of listings marked as good or great deals, you have a decent chance of finding a value-oriented example.

Is the 2021 GMC Yukon XL reliable?

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

The review summary also emphasizes that owners see it as dependable and trouble-free enough to trust for long trips, with many feeling confident in its long-term ownership experience. The main caution for used buyers is that a large, complex SUV can become expensive if prior maintenance was skipped, so condition and service history matter a lot.

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

At 72.7% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.

You should start with a vehicle history report and confirm whether any reported damage was repaired properly. Then prioritize a pre-purchase inspection, especially for brakes, suspension, and any signs of uneven wear or poor repair work. Because this is a large SUV, you should also focus on how it drives under braking, at highway speeds, and with a full load of passengers or cargo.

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

This looks like a moderate, selective buyer’s market, so you can shop patiently but still move quickly when a strong listing appears.

• Deal availability: 35.6% of listings are priced as good or great deals.
• Inventory: There are 1,585 listings available.
• Price trend: Prices have softened 14.78% compared with last year.
• Clean inventory: 72.7% of listings are accident-free.

If you find a listing below $39,200, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2021 GMC Yukon XL's resale value?

The current average of $39,200 sits slightly below last year's $45,999.

That drop suggests the market has already adjusted downward, which can help you buy at a more favorable entry point today. For a future seller, that also means resale value will depend heavily on how well your vehicle is maintained, how clean its history is, and whether it stands out with desirable equipment and condition. Strong presentation matters more when the broader market has softened.

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

Should I buy a 2021 GMC Yukon XL 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:

• 35.6% of listings are priced as good or great deals.
• At 72.7% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 14.78% compared with last year.
• Owners rate it 5/5 — a strong satisfaction signal.

The bottom line: You should lean toward the 2021 if you want the newer redesign, the added space from the independent rear suspension, and a strong owner satisfaction signal. If your main goal is to spend less, a nearby older year may be worth considering, but you’ll want to balance that against the 2021’s improved packaging and comfort.

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

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